Considering the Charles' law and STP conditions, the volume at 100°C is 30.60 L.
Charles' lawCharles' law establishes the relationship between the volume and the temperature of a sample of gas at constant pressure and establishes that when the temperature is increased the volume of the gas also increases and that when cooling the volume decreases.
Mathematically, Charles's law is expressed as:
V÷T=k
where:
V is the volume.
T is the temperature.
k is a constant.
Analyzing an initial state 1 and a final state 2, it is fulfilled:
V₁÷T₁= V₂÷T₂
STP conditionsThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
Volume at 100°CIn this case, you know:
V₁= 22. 4 LT₁= 0°C= 273 KV₂= ?T₂= 100 °C= 373 KReplacing in Charles' law:
22.4 L÷ 273 K= V₂÷ 373 K
Solving:
(22.4 L÷ 273 K)× 373 K= V₂
30.60 L= V₂
Finally, the final volume is 30.60 L.
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is the specific heat capacity of gaseous ethanl greater than. less thean or equal to the speciifc heat captity of liquid ethanol
The specific heat capacity of the gaseous ethanol is less than the specific heat capacity liquid ethanol.
The specific heat capacity is given as :
Q = mc ΔT
where ,
Q = heat
m = mass
c = specific heat capacity
ΔT = temperature change
The heating curve represented the temperature , T in the y axis and the heat added at the x - axis. the slope is given as :
T / Q = 1 / C
T is the temperature and the c is the specific heat capacity.
Thus, the heat capacity of the gaseous ethanol is low as compared to the liquid ethanol.
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Which of the following geometries for the complex ion [Fe(en)Cl4]? are possible?
O linear
O trigonal bipyramidal or square pyramidal
O octahedral
O trigonal planar
O tetrahedral or square planar
The following geometry for the complex ion [Fe(en)Cl4] is : octahedral.
What is meant by molecular geometries?The arrangement of atoms in a molecule in three dimensions is known as molecular geometry, commonly referred to as the molecular structure. A compound's polarity, reactivity, phase of matter, color, magnetism, and biological activity can be determined by knowing its molecular structure.
Tetrahedral molecular geometry is present here (e.g. CH4). Trigonal pyramidal molecular geometry results from having three bond pairs and one lone pair of electrons (e.g. NH3). The geometry of the molecule is angular or curved if there are two bond pairs and two lone pairs of electrons (e.g. H2O).
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How did the pressure in the left intrapleural cavity change when the valve was opened?
O The pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a positive number to a negative number.
O It went from a positive number to a negative number and the pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a negative number to zero and the pressure in the intrapleural cavity equalized with the atmospheric pressure.
O It went from a negative number to zero.
The pressure in the left intrapleural cavity changes when the valve was opened as : It went from negative number to zero and the pressure in intrapleural cavity equalized with the atmospheric pressure.
What is meant by intrapleural cavity?The pressure inside the pleural cavity is called as intrapleural pressure. It is characterized as negative pressure when the pressure inside the pleural cavity is typically only a little bit lower than the ambient pressure.
The external intercostal muscles and diaphragm contract during inspiration, expanding the thoracic cavity. As a result, the intrapleural pressure decreases, increasing the transpulmonary pressure and expanding the lungs.
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At 161 K, SiH4 boils but SiO2 remains as a solid. Using principles of interparticle forces, explain the difference in boiling points.
The boiling point of a substance is determined by the strength of the interparticle forces between molecules.
What is boiling point?Boiling point is the temperature at which a liquid changes state from liquid to gas, also known as its vaporization point. The boiling point of water at sea level is 100°C (212°F).
In the case of SiH4, the boiling point is higher than that of SiO2 due to the stronger nature of the intermolecular forces. This is because SiH4 is held together by stronger hydrogen bonds, resulting in more energy needed to break apart the molecules. On the other hand, SiO2 is held together by weaker dipole-dipole interactions and London dispersion forces, meaning it requires less energy to break apart the molecules and thus has a lower boiling point.
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9. Convert 17.92 L of CO to grams:
C- 12.011
0-15.999
Answer in FOUR Sig Figs with Units
Answer:
its correct answer is 22.4 grams
write the oxidation number of the oxygen atoms in h2o2 and the oxidation number of the oxygen atoms in o2
the oxidation number of the oxygen atoms in h2o2 and the oxidation number of the oxygen atoms in o2 is -1 and 0
An atom's oxidation number (also known as oxidation state) in a chemical is an amount that represents the amount of electron density gained or lost by the atom during in the formation of the compound. In general, the oxidising number of an element in a compound can be determined using the following rules: n element's oxidising number is null whenever it is unrestricted (uncombined). The oxidation number of a polyatomic ion is equivalent towards the ion's charge. We can use these rules to calculate the oxidation number of the oxygen atoms in H2O2 and O2: In H2O2, the oxidation number of the oxygen atoms is -1. This is because the compound is neutral and the hydrogen atoms have an oxidation number of +1, so the oxygen atoms must have an oxidation number of -1 in order for the sum of all the oxidation numbers to be zero. In O2, the oxidation number of the oxygen atoms is 0. This is because the compound is a diatomic molecule and the oxidation number of the free element oxygen is 0.
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What does the World Skin Cancer Map tell you about how the skin cancer rates of Australia and Brazil differ?
The World Skin Cancer Map shows that Australia has much higher skin cancer rates than Brazil. In Australia, an estimated 5.4 out of 100 people will develop melanoma in their lifetime, compared to 0.4 out of 100 in Brazil.
What is Skin Cancer?Skin cancer is a type of cancer that affects the skin cells. It is caused by over-exposure to ultraviolet (UV) radiation from the sun and sun beds. It is the most common type of cancer in the United States, and can affect anyone, regardless of age, gender, or skin color. It is very important to protect your skin from the sun by using sunscreen.
Australia also has higher rates of non-melanoma skin cancer, with estimated rates of 24.3 out of 100 people in Australia, compared to 5.3 out of 100 people in Brazil.
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The boiling point of acetone is 50.5°C, while the boiling point of water is 100°C. Bringing a solution made of water and acetone to which of the following temperatures would allow the separation of these two liquids?
The temperature must be greater than 50.5°C and less than 100°C.
What is temperature ?
Temperature is a physical property that is used to measure the average kinetic energy of particles in a system, such as a gas, liquid, or solid. It is measured in units of degrees on the Celsius, Fahrenheit, or Kelvin scales.
Temperature is related to the average kinetic energy of particles in the system, and is affected by the number of particles, their mass, and the strength of their interactions.
Which temperature range is typical?
Core temperature is 98.6 F on average (37 C). However, the average body temperature might be anywhere from 97 F (36.1 C) to 99 F (37.2 C) or higher. Depending on the period of year or how busy you are, your body temperature may change. In general, elderly people's temperature are lower than those of younger people.
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Hello can you please help me?
here is my big question:
considering that in any part of the periodic Table of the Elements, if the element's position is higher and more to the right, its atomic radius is smaller. So our element has more metallic character. According to this point, if we consider the elements from iron to zinc, zinc is more reactive than iron and copper. So why is the reactivity of copper less than iron?
Answer:
because I'm the reactivity table of metals it shows that iron is indeed more reactive than copper
Explanation:
potassium (most reactive)
sodium
lithium
calcium
magnesium
aluminum
zinc
iron
tin
lead
hydrogen
copper
mercury
silver
gold( least reactive)
A compound has the following percentage composition: 40.0% carbon, 6.72% hydrogen, 53.28% oxygen. How many moles of hydrogen are present in 100 g of the compound described above
The compound is Glucose.
C: 40 g divided by 12 g per mol equals 3.333 mol
H: 6.72 g/mol (1 g) = 6.72 mol
O: 53.28 g/mol (16 g) = 3.33 mol
Subtract the lesser amount of moles.
C: 3.333 / 3.33 = 1.00
H: 6.72 / 3.33 = 2.02 ≈ 2
O: 3.33/3.33 = 1.00
Statistical method
The empirical formula's molar mass is 12 g/mol + 2*1 g/mol + 16 g/mol = 30 g/,ol.
180 g/mol / 30 g/mol = 6 times the mass of the empirical formula is contained in the molar mass.
The empirical formula of compound is six times the molecular formula.
=>[tex]C_{6} H_{12} O_{6}[/tex]
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How many grams are in 0.89 moles of CaCI2
0.0080 grams are in 0.89 moles of CaCI₂.
What is mole ?
The mole (M) is defined as it contain exactly 6.023 × 10²³ elementary entities present in it. 1 mole is exactly equal to the 6.023 × 10²³ elementary entities.
We can solve the above problem as follows;
So,
1 Mole of substance = Molar mass of the substance.
The given compound named is Calcium Chloride.
Then,
Molar mass of Calcium chloride = 1 mole
Molar mass of CaCl₂ = 40 + 2 × 35.4
= 110.9g/mol
Therefore,
110.9 grams of CaCl₂ = 1 mole
1 gram of CaCl₂ = 1 / 110.9
0.89 grams of CaCl₂
= 1 / 110 × 0.89
= 0.0080 grams
Thus, 0.0080 grams are in 0.89 moles of CaCI₂.
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Which molecular geometry, of an ABn molecule, results in a polar molecule?
O tetrahedral
O trigonal pyramidal
O square planar
O linear
Answer:
trigonal pyramidal
Explanation:
In the case of water.
what is the difference between sigma and pi bonds
In chemistry, a sigma bond (σ bond) is a chemical bond formed by the overlap of two atomic orbitals. On the other hand, a pi bond (π bond) is a chemical bond formed by the overlap of two p orbitals.
Sigma bonds are the strongest type of covalent bond, with a bond strength of about 280-350 kJ/mol. They are also the shortest bond, with an average length of about 0.15 nanometers (nm).
Sigma bonds are characterized by their short bond length and high bond energy. They are also directional, meaning that they are stronger in certain orientations than in others.
Pi bonds are weaker than sigma bonds, with a bond strength of about 70-100 kJ/mol. They are also longer than sigma bonds, with an average length of about 0.2nm.
Pi bonds are characterized by their longer bond length and lower bond energy compared to sigma bonds. They are also less directional than sigma bonds, meaning that they are relatively equally strong in all orientations.
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Covalent bonds has two types which are a sigma bond is a chemical bond formed by the overlap of two atomic orbitals and a pi bond (π bond) is a chemical bond formed by the overlap of two p orbitals.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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What is the mass of 10 g?
The amount of matter contained within an object is commonly referred to as mass. The most typical way to measure it is as inertial mass, which refers to an object's resistance to acceleration under the influence of a net force.
Although the size of an object and its mass are frequently associated, larger objects do not always have more mass. For instance, an inflated balloon would have substantially less mass than a silver golf ball. Although there are numerous alternative units used to describe mass around the world, the kilogram is the accepted unit of mass according to the International System of Units (SI) (kg).
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How do you measure distance?
We measure distance by using a ruler to measure the distance between the two places.
Distance is defined as the amount of the space between the two place or the things.
Short distances can be measured in centimeters (cm), and the long distances may be measured in kilometers (km). SI unit of the distance is meter (m). Distance is the length of the route between the two points. For example: Distance of a race; it is the length of the track between the starting line and the finishing line.
Maps can also be used to measure the distance. The name of the scale is map's bar scale.
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LPG consists of mainly
A. methane, ethane and hexane
B. ethane, hexane and nonane
C. methane, hexane and nonane
D. methane, butane and propane
D. methane, butane and propane
Propane and butane are both types of alkane hydrocarbons with relatively low boiling points, which allows them to be easily converted to a liquid form at relatively low pressures. This makes them easy to transport and store. Methane, ethane, and hexane are also alkane hydrocarbons, but they are not typically found in large amounts in LPG.
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a scientist oserves a chemical reaction as it takes place. how can the scientist so in order to tell if the reaction has acheived equilibrium
A chemical reaction reaches equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in no net change in the concentrations of the reactants and products.
A scientist observing a chemical reaction can tell if the reaction has achieved equilibrium by monitoring the following: Concentration of reactants and products: The concentrations of reactants and products should no longer change over time if the reaction has reached equilibrium. Temperature: If the reaction has reached equilibrium, the temperature of the system should remain constant. Pressure: If the reaction is taking place in a closed container, the pressure of the system should also remain constant if the reaction has reached equilibrium. It's worth noting that the equilibrium is a dynamic process, meaning that the concentrations of reactants and products will remain constant over time, but the chemical reaction is still taking place.
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Which term is best described as an organic compound containing a carbonyl group bound to two hydrogen atoms or to a hydrogen atom and an alkyl substituent
A carbonyl group is bound to hydrogen bond or to a hydrogen ion and an alkoxy substituent in an organic compound known as an aldehyde.
What is Aldehyde?Aldehyde is an organic compound containing a functional group with the structure −CHO, in which a carbon atom is double-bonded to an oxygen atom and single-bonded to a hydrogen atom. Aldehydes are the simplest type of carbonyl group and the most common type of organic compound. Aldehydes are found in many natural and manufactured products, including perfumes and food products. The most common example of a natural aldehyde is formaldehyde, which is produced by plants and animals.
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A 13.1-g sample of ice at −17.9°C is mixed with 103.5 g of water at 73.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.03 and 4.18 J/g·°C, respectively, and the enthalpy of fusion for ice is 6.02 kJ/mol.
The final temperature of the mixture when no heat loss to the surroundings is equal to 69.57 °C
What is the specific heat capacity?The specific heat capacity can be defined as the amount of heat required to increase the temperature in 1 unit of substance by 1° Celcius.
The specific heat capacity can be expressed in the form of the mentioned formula below:
Q = mSΔT
The specific heat capacity of the water, S = 4.184 J/g°C
The heat lost by water = heat gained by the ice
Heat lost by water = heat gained by the ice + heat increased by the water
m₁S₁ (T₂ - T₁) = m₂L + m₂S₂ (T₂ - T₁)
103.5 × 4.18 × (73- T) = 13.1 × (2.03) + 5 × 4.18 × (T-0)
31582 - 432.63 T = 26.59 + 20.9 T
453.53 T = 31555
T = 69.57 °C
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There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks:
Mass (amu) Relative Size
157. 836 0. 2569
159. 834 0. 4999
161. 832 0. 2431
(a) What is the origin of each peak (of what isotopes does each consist)?
(b) What is the mass of each isotope?
(c) Determine the average molecular mass of a Br2 molecule.
(d) Determine the average atomic mass of a bromine atom.
(e) Calculate the abundances of the two isotopes
There are two isotopes of bromine atom⁷⁹Br, ⁸¹Br.
a) Each peak originates from a different isotope of bromine. Each peak is composed of a different isotope of bromine. The mass of each isotope is the sum of the masses of the two atoms in the molecule. The average molecular weight of Br_ molecules is 36.184 g/mol.
b) The isotope of bromine has an atomic weight of 78.92 amu and a relative abundance of 50.69. The other major isotope of bromine has an atomic mass of 80.92 amu and a relative abundance of 49.31.
c) The average molecular mass of a [tex]Br_{2}[/tex] = 159.8066274.
d) The average atomic mass of Bromine is found to be. 9 u or 79.9 g mol⁻¹.
e) Bromine has two stable isotopes, ⁷⁹Br and ⁸¹Br, having relative mass abundances of 50.686% and 49.314%
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Estimate how much heat in joules is released when 25. 0 g of water (C = 4. 184 J/g°C) is cooled from 80. 0°C to 30. 0°C?
The heat in joules is released when 25. 0 g of water (C = 4. 184 J/g°C) is cooled from 80. 0°C to 30. 0°C is -5210 J
To find the amount of heat released when a substance is cooled, we can use the equation:
q = mcΔT
where q is the amount of heat (in joules), m is the mass of the substance (in grams), c is the specific heat capacity of the substance (in joules per gram per degree Celsius), and ΔT is the change in temperature (in degrees Celsius).
Given the information in the question, we have:
m = 25.0 g
c = 4.184 J/g°C
ΔT = 30.0°C - 80.0°C = -50.0°C
So, we can substitute these values into the equation and get:
q = (25.0 g)(4.184 J/g°C)(-50.0°C)
q = -5210 J
Therefore, the amount of heat released when 25.0 g of water is cooled from 80.0°C to 30.0°C is -5210 J.
A negative sign means the heat is absorbed during the cooling process, it is an endothermic process.
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Which of these are involved in creating
new technologies?
A. engineering only
B. science only
C. math only
D. science, engineering, and math
In general, which of the following ranks the repulsions indicated from weakest to strongest? O Lone pair-bonding pair, lone pair-lone pair, bonding pair---bonding pair O Bonding pair-bonding pair, lone pair-bonding pair, lone pair-one pair O Lone pair-lone pair, lone pair-bonding pair, bonding pair-bonding pair O Lone pair-bonding pair, bonding pair-bonding pair, lone pair-one pair
Option B, Bonding pair-bonding pair, lone pair-bonding pair, lone pair-lone pair. The electrons in bonding pairs are repulsion held relatively closely together, and are involved in the formation of a chemical bond.
The repulsion between two bonding pairs is relatively weak, as they are attracted to the positively charged nuclei of the atoms they are bonding. The repulsion between a lone pair of electrons and a bonding pair of electrons is generally stronger than that between two bonding pairs because the lone pair is not involved in bonding and tends to be held further away from the nucleus, causing the electron cloud to be larger and thus a stronger repulsion because the two lone pairs are not involved in bonding, and are held relatively far away from the nuclei, causing the electron clouds to be larger and thus a stronger repulsion
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Calcium oxide reacts with water to form calcium hydroxide. Type of reaction ____________________________ Balanced chemical equation:
Calcium oxide reacts with water to form calcium hydroxide which is a type of combination reaction. Therefore, the balanced chemical equation is: CaO+H2O→Ca(OH)2+Δ
The symbolic representation of a chemical reaction is a chemical equation. In this, the formulas and symbols for the reactants and products are used to depict them. Since the Middle Ages, quicklime, also known as calcium oxide, has been utilized as an alkaline substance. One of the oldest substances that humans have ever discovered is quicklime. Other names for it include lime or burned lime. Lime, or calcium oxide, is a chemical substance with the formula CaO. When calcium oxide, also referred to as quick lime, and water combine, calcium hydroxide is created (commonly known as slaked lime). This reaction is an example of a combination reaction.
Calcium oxide + Water → Calcium hydroxide
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A chemistry student needs of glycerol for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of glycerol is . Calculate the volume of glycerol the student should pour out. Round your answer to significant digit
The student is to weigh out 94.5g of glycerol in accordance with the provided statement.
Glycerol: Is it simply sugar?Glycerin is a kind of carbohydrate known as a polyol, along with other sugar alcohols including sorbitol and erythritol. Glycerin has a complex taste, but unlike sugar I've already discussed—it is not absorbed by the body as sugar and does not raise blood sugar levels. Glycerol may be safe for short-term treatment when taken orally. Headaches, lightheadedness, bloat, nausea, and diarrhea are possible side effects. Glycerol appears to be safe when used topically. It might result in burning, itching, and redness.
1mL = 1cm³
Quantity = 75mL = 75cm³
1.26 g/cm³ is the density.
Mass = ?
Mass is equal to the product of volume and density.
Mass = 1.26 * 75 = 94.5g
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The complete question is-
A chemistry student needs 75.0 mL of glycerol for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of glycerol is 1.26 g.cm⁻³. Calculate the mass of glycerol the student should weigh out. Be sure your answer has the correct number of significant digits.
absorbance is directly proportional to ___________________________.
The concentration which determines how much radiation is absorbed, increases together with the absorbance.
One factor that influences a sample's absorbance is concentration (c). It would be reasonable to suppose that more radiation will be absorbed as the concentration rises, raising the absorbance. As a result, the relationship between concentration and absorbance is straightforward.
Another component is the path length (b). The absorbance rises as the length of the radiation beam and the number of molecules in its path do as well. As a result, the concentration is inversely related to the distance traveled. As you are undoubtedly already aware from earlier experiences, a particular chemical species absorbs some wavelengths of radiation but not others.
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The complete question as follows
Why is absorbance directly proportional to concentration?
When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is
An alpha particle bombardment of aluminum with an atomic number of 27 results in the production of a neutron and phosphorus 15. The particular isotope formed is aluminum-28.
Fundamental alterations take place at the level of the atomic nucleus during nuclear reactions. Analyze the properties of the neutron, which has a mass similar to that of a proton but no electric charge. As a result, when it interacts with the aluminum core, the atomic number should remain constant but the atomic mass should rise by one unit. The newly produced atom is in an excited state when it transitions to the base state with the emission of a high-energy radiation called a gamma ray. Aluminum-28 isotope is formed. ⁷A₂₇ + ⁰n₁ → ⁷Al₂₈ˣ
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In the equation 2K(s) + 2H2O(l) → 2K(OH)(aq) + H2(g), identify the physical state of each reactant and product
K can be found in solid form. Water exists as a liquid. KOH can be found in aqueous form. Hydrogen exists as a gas.
What is reactant and product?Reactants are chemical compounds that engage in chemical reactions, resulting in the formation of new chemicals known as products. Products are the new compounds created as a result of the chemical reaction between reactants.
Reactant- The substances which participate in a chemical reaction, are called reactants. A chemical reaction describes the process by which atoms, the fundamental building blocks of matter, rearrange themselves to form new combinations. Reactants are raw materials that react with one another.
Product- A product is a substance that is present at the end of a chemical reaction. In the equation above, the zinc and sulfur are the reactants that chemically combine to form the zinc sulfide product.
Here,
K=solid
H₂O=liquid
KOH=aqueous
H₂=gas
K exist in solid form. H₂O exist in liquid form. KOH exist in aqueous form. H₂ exist in gas form.
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First, once in the simulation, click on “solution values”. Move the blue levers (solute amount) and (solution volume) to the required amounts and find the molarity of the following:
1. Using Drink Mix mode:
a. What is the molarity when .772 moles are dissolved in .500 Liters of water?
b. What is the molarity when .453 moles are dissolved in .450 Liters of water?
The molarity when .772 moles are dissolved in .500 Liters of water is 0.0015M. The molarity when .453 moles are dissolved in .450 Liters of water is 0.001M.
What is molarity ?The term molarity is defined as the number of moles of solute dissolved in per litre of solution. The unit of molarity is mole, which is denoted by the symbol "M".
M = Number of moles of solute / litre in solution
1. Number of moles of solute = .772 moles
so, 0.772 / 500
= 0.0015 M
2. Number of moles of solute = .453 moles
so, .453 / 450
= 0.001 M
Thus, The molarity when .772 moles are dissolved in .500 Liters of water is 0.0015M. The molarity when .453 moles are dissolved in .450 Liters of water is 0.001M.
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How many gram i hydrogen ga (H2) are in 2600 ml comtainer at 35 degree celiu and a preure of 165 mmHg
108gm of hydrogen gas is present in2600ml container at 35-degree Celsius and at pressure of 165mm Hg.
Given data:
water = 2600ml
temp = 35°C & 95k
pressure = 165mm Hg & 0.162atm
From given information we apply ideal das equation to get moles.
PV = nRT
0.162atm * 2600ml = n 0.0821 * 95k
n = 54
Now we know 1 mole of hydrogen contain 2.016gm hydrogen.
In 54 moles we have 108gm hydrogen.
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