Answer: The new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 10.0 mL, [tex]M_{1}[/tex] = 2.0 M
[tex]V_{2}[/tex] = 100 mL, [tex]M_{2}[/tex] = ?
Formula used to calculate the new concentration is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\10.0 mL \times 2.0 M = M_{2} \times 100 mL\\M_{2} = 0.2 M[/tex]
Thus, we can conclude that the new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
What is the molarity when 25.0 g of the compound NaClO3 is placed in 85.0 mL of solution?
Answer: Molarity when 25.0 g of the compound [tex]NaClO_{3}[/tex]is placed in 85.0 mL of solution is 294.12 M.
Explanation:
Given: Mass = 25.0 g
Volume = 85.0 mL (1 mL = 0.001 L) = 0.085 L
Molarity is the number of moles of a substance divided by volume in liter.
Hence, molarity of given solution is calculated as follows.
[tex]Molarity = \frac{mass}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{mass}{volume (in L)}\\= \frac{25.0 g}{0.085 L}\\= 294.12 M[/tex]
Thus, we can conclude that molarity when 25.0 g of the compound [tex]NaClO_{3}[/tex]is placed in 85.0 mL of solution is 294.12 M.
Can someone please explain this to me t,t
I could do the second part if i just understood the first-
Answer:
Theoretical 32.04 g
The precent yeild 87. 39 %
Explanation:
Mole of H2 = m/mw = 4/2 = 2 mol
From the equation
1 mol H2 --> 1/2 mol CH3OH
2 mol H2 -->??
So we have 1 mol Ch3oh
Mass of Ch3oh = mole *Mw = 1* 32.04
= 32.04g >>> the theoretically
For percent yeild = actual / theoretical * 100%
( 28.0/32.04) *100% =
87.93%
A physics experiment is conducted at a pressure of 14.0 kPa. What is this pressure in mmHg?
Answer:
18.4 mmHg. The answer is 18.4 mmHg.
Why chemical industry important for the nation with its examples.
Explanation:
employment in the country.
economic boom n latest techonology.
less poverty.
more development.
more jobs for people.
increase in exports which will make large profits n will be utilized in the development of country.
GDP per capita will increase.
high standard of living.
Ions Types of Ions Cation Anion 1. H+ 2.O-2 3.Ba2+ 4.Br- 5.Hg2+ 6.Li+ 7.Ca2+ 8.F- 9.S-2 10.Fe3+
Explanation:
The species with a positive charge over it, which means lack of electrons are called cations. Whereas the species with negative over it, meaning it has an excess of electrons with it are called anions.
From the list given the cations are
H+, Ba2+, Hg2+, Li+, Ca2+ and Fe2+
Whereas anions from the list are
O-2, Br-5, F-, S-2.
A Combination of cation and anions make an ionic compound in which cation is written first and then anion.
6. Changes in the rate of chemical reactions depend on what conditions?
Answer:
temperature, concentration, pressure
Harim placed 5mL of ethanol into a container that weighs 1 gram using a dropper. He already knew the density of ethanol is 0.78 g/mL.
What is the mass of the ethanol, not including the container?
Answer:
there it is fella tried on ma own consciousness
How many miles are in 27.4 g of NO2
Answer:
0.59 moles
Explanation:
Given mass = 27.4 g
Molar mass of NO₂ = 46 g/mol
We need to find the number of moles. We know that,
No of moles = given mass/molar mass
Put all the values,
[tex]n=\dfrac{27.4}{46}\\\\n=0.59[/tex]
Hence, there are 0.59 moles of NO₂ .
(2-2) Looking at the chemical formula CaF2 (calcium fluoride), what do you think this substance is made of? (Choose ALL that apply)
Metal
Metalloid
Non-metal
Answer:
Metal
Non-metal
Explanation:
CaF2 is an ionic compound. Ionic compounds are mostly composed of a metal and a non metal. Metals donate electrons to non-metals to form ionic compounds.
Calcium is a divalent ion of group two in the periodic table while F is a univalent nonmetal of group 17 in the periodic table. Hence the compound CaF2 is composed of a metal and a nonmetal.
Why would the acidic water that erupts from
geysers burn your skin?
Answer:
They're sometimes acidic
Microorganisms also break off pieces of surrounding rocks, which adds sulfuric acid to the pools. This highly acidic water bubbles to the surface, where it can burn anyone who is exposed to it
Explanation:
thank me later
What is the mass of a sample of NH3 containing 3.80 x 1024 molecules of NH3? (5 points)
74.8 grams
107 grams
89.4 grams
101 grams
Answer: 107 grams
Explanation: got it right on the test
The mass of a sample of f NH₃ containing 3.80 x 10²⁴ molecules of NH₃ is 107.27 grams.
What is a molecule?A molecule is a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
6.02214076 × 10²³ molecules constitute 1 mole of NH₃
3.80 x 10²⁴ molecules constitutes of = 6.31 moles
1 mole of NH₃ = 17 gm
11.19 mole will be = 17 X 6.31
= 107.27 grams
Therefore the mass of a sample of NH₃ containing 3.80 x 10²⁴ molecules of NH₃ is 107.27 grams.
Learn more about molecules here:
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How many atoms of Neon are in 65.0 L of Neon gas?
Answer:
65.0 g NH3 x
mol NH3
17.04 g NH3
x
6.02x1023 NH3 molecules
mol NH3
= 2.30x1024 NH3 molecules
(have uh good day)
Answer:
mole of Neon = 65L/22.4L
=2.901moles of Neon
1 mole of a substance contains 6.022x10^23atoms
So 2.901moles will contains
2.901 x 6.022x10^23atoms
=1.747 x 10^24atoms
HELP ME PLEASE
IM LITERALLY FAILING
Which of the following is not a component of cell theory?
a. Cells can be generated by element condensation in water vapor.
b. All organisms are made of one or more cells.
c. Cells are basic building blocks of all life.
d. Cells must come from pre-existing cells.
Answer:
A
Explanation:
Definitely not in the cell theory
the molar mass of CCI2F2
Answer:
The molar mass and molecular weight of CCI2F2 is 315.8271.
Explanation:
Hamood backwards is hamood
Answer:
dang bro, thats deep
Explanation:
so deep imma cry
If I have 4.4 moles of nitrous oxide (laughing gas) that is kept at 32.9 °C in a container under 1.6 atm, what is the volume of the container? (R = 0.0821 (L*atm)/(mol*K))
Round your answer to 1 decimal place.
Answer:
Explanation:
Using the ideal gas equation as follows:
PV = nRT
Where:
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
Based on the information provided in this question;
P = 1.6atm
n = 4.4 moles
R = 0.0821 L*atm/mol*K
T = 32.9°C = 32.9 + 273 = 305.9K
V = ?
How many moles of Chlorine gas are required to produce 5.35 moles of NaCl in this
reaction?
Answer:
2.675 moles of Chlorine gas are required
Explanation:
Chlorine gas, Cl2, reacts with NaBr to produce NaCl and Br2 as follows:
Cl2 + 2NaBr → 2NaCl + Br2
Where 1 mole of chlorine gas produce 2 moles of NaCl
Thus, to produce 5.35 moles of NaCl are required:
5.35mol NaCl * (1mol Cl2 / 2mol NaCl) =
2.675 moles of Chlorine gas are requiredI need help on dis chem shi if y’all can answer fa me I would appreciate dat
At which position in its orbit was the Moon located during the 2015 supermoon total lunar eclipse?
The moon was located at position C in its orbit during the 2015 supermoon total lunar eclipse.
What is a supermoon lunar eclipse?A supermoon can be described as a full moon that nearly coincides with perigee which is the closest that the Moon comes to the Earth in its elliptic orbit as results in a slightly larger-than-usual apparent size of the lunar disk can be viewed from the earth.
Perigee syzygy is the technical name of the Earth-Moon-Sun system or a full Moon around perigee. The association of the Moon with oceanic and crustal tides claims that the supermoon phenomenon can be associated with an increased risk of events such as volcanic eruptions and earthquakes, but no such connection has been found.
In the 21st century, there are 87 lunar eclipses in total, of which 6 are micro moons and 28 are supermoons. A supermoon lunar eclipse was seen in the September 2015 lunar eclipse.
Learn more about lunar eclipse, here:
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How can autoimmune diseases be dangerous?
Base your answer on the information below. Some carbonated beverages are made by forcing carbon dioxide gas into a beverage solution. When a bottle of one kind of carbonated beverage is first opened, the beverage has a pH value of 3. After the beverage bottle is left open for an hour, the hydronium ion concentration in the beverage solution decreases by 10 times of the original concentration. Determine the new pH of the beverage solution.
The question is incomplete, the complete question is;
Some carbonated beverages are made by forcing carbon dioxide gas into a beverage solution. When a bottle
of one kind of carbonated beverage is first opened, the beverage has a pH value of 3.
After the beverage bottle is left open for several hours, the hydronium ion concentration in the beverage
solution decreases to 1/1000 of the original concentration. Determine the new pH of the beverage solution.
Answer:
6
Explanation:
Recall that
pH= -log[H3O^+]
Hence, [H^+] when the drink was first opened;
3 = -log[H^3O+]
[H^+] = Antilog(-3)
[H30^+] = 1 * 10^-3
Since [H3O^+] decreases to 1/1000 times its original value;
New [H3O^+] = 1 * 10^-3 * 1/1000 = 1 * 10^-6
Hence,
New pH = -log[1 * 10^-6]
New pH = 6
what is the method use to separate sand and water
Sand and water can be separated by any of the following methods:
1. Sedimentation and decantation: This method involves the mixture being kept undisturbed for some time. After some time, sand being heavier and insoluble in water, settles down at the bottom of container. Now, water is poured into another container to separate it from sand.
2. Filtration: This method involves the mixture being passed through a filter paper (a filter with very fine pores). Sand particles being larger in size are retained by the filter paper and get separated from water.
I hope this helps! :D
In what sense are photons quantized?
A. Each photon emits more energy than its absorbs
B. Each photon can have multiple frequencies
C. Each photon travels exactly at the same speed of light
D. Each photon has a specific amount of energy
Answer:
Each photon has a specific amount of energy
Explanation:
Plss Guyss I need ur helpp ?? Ill give u brainilist and 35 points ...
A chemical reaction is taking place between two reactants dissolved in a liter of water. If an additional liter of pure water is added to the reaction mixture, what will be the effect on the reaction rate? Explain
Answer:
The chemical reaction rate will have a effect that which two reactants disolve in liter so if pure water is added it will still have the same reaction but lighter
Explanation:
#keep on learning
A gas at 200 K occupies a volume of 350 ml. What temperature is needed to increase the volume
to 500 mL?
Answer: Temperature in constant pressure is 286 K
Explanation: If pressure remains constant, then V/T = constant.
V1 = 350 ml and T1 = 200 K and V2 = 500 ml. V1/T1 = V2/T2
and T2 = T1· V2 / V1 = 200 K · 500 ml / 300 ml = 285,7 K
HELPPP
4) The picture below shows information about the element Gold. How many protons does an atom of Gold have?
Answer:
79 protons.
Explanation:
Nitrogen-13 emits beta radiation and decays to carbon-13 with a half life of 10
minutes. Assume a starting mass of 2.00 g of nitrogen-13.
(Use to answer the questions below.)
How long is three half-lives in the example above? *
Answer:
From the Question....
A half life is 10minutes...
3half lives would be a total of 30minutes.
This unknown element could most likely be a part of which of the following
familles?
A Alkall metals
B Alkaline earth metals
C Halogens
D Noble Gases
Answer:
halogen
Explanation:
because the lewis dot structure shows 7 dots which means 7 valence electron. halohe falls on group 17 or7A having 7 valence electron
____is the degree of hotness or coldness of a body or place
How many moles of hypomanganous acid, H3MnO4, are contained in 22.912 g?
Answer:
0.188mol
Explanation:
Using the formula as follows:
mole = mass/molar mass
Molar mass of hypomanganous acid, H3MnO4 = 1(3) + 55 + 16(4)
= 3 + 55 + 64
= 122g/mol
Mass of H3MnO4 is given as 22.912 g
Hence;
moles = 22.912 ÷ 122
number of moles = 0.188mol