Answer:
m=621.54g
Explanation:
number of moles= mass of H2O/molar mass of H2O
n=m/mm
make mass the subject of the formula
m=n*mm
find molar mass of water
H2O=1(16)+2(1)
mm= 18.0g/mol. n=34.53mol
hence, m=34.53mol*18.0g/mol
m=621.54g
Match the correct atom to its electronic configuration. please help!!thanks
Neon is the tenth element with a total of 10 electrons. So, the correct atom is neon.
Circle the element with the LOWER IONIZATION ENERGY.
11. B or C
12. Ga or B
13. K or Ca
14.P or S
15. Co or Cr
Answer:
Answers with detail given below.
Explanation:
Ionization trend along period:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases.
Ionization trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases.
Elements with lower ionization energy:
11) B
12) Ga
13) K
14) P
15) Cr
What could possibly happen if we mix plan old powdered sugar with colorless,odorless sulfuric acid?PLEASE HELP
The volume of 2.050 M copper(II) nitrate that must be diluted with water to prepare 750.0 mL of a 0.8543 M solution is equal to mL. Report your answer to 4 significant figures in decimal notation (not scientific or exponential notation).
Answer:
312.5
Explanation:
The volume of 2.050 M copper(II) nitrate that must be diluted with water to prepare 750.0 mL of a 0.8543 M solution is equal to 312.5 ml.
What is volume?Volume is defined as a three dimensional quantity that is used to measure the capacity of a solid shape.
It is also defined as the measure of the capacity that an object holds.
M1V1 = M2V2
Here M1 = 2.050 M
M2 = 0.8543 M
V2 = 750 ml
So, V1 = M2V2 / V1
= 0.8546 M x 750 ml / 2.050
= 312.5 ml
Thus, the volume of 2.050 M copper(II) nitrate that must be diluted with water to prepare 750.0 mL of a 0.8543 M solution is equal to 312.5 ml.
To learn more about volume ,refer to the link below:
https://brainly.com/question/13338592
#SPJ5
Which of the following is a compound?
Gold
Silver
Carbon Dioxide
Lead
Answer:
Carbon dioxide
Explanation:
Because CO2
Which is the weakest type of intramolecular force/bond?
a. Polar covalent b. Ionic c. Metallic d. Nonpolar covalent
Answer:
Non polar covlant
Explanation:
All the radioactive elements are found in the last group of the Periodic Table.
True
False
Answer:
False
Explanation:
Calculate the Tidal Range
1 point
High
Tide
Level
(m)
0.66
Low
Tide
Level
(m)
-0.55
Tidal
Range
(m)
June 28
Explanation:
Tidal range is the difference of the mean high tide level and the mean low tide level.
=> Tide range = 0.66m - (-0.55m) = 1.21m.
Answer:
Tidal Change=0.66-(-0.55)=0.66+0.55 = 1.21 meters
1.21 m is the right answer.Explanation:
Tidal Change is the change in the mean high tide level and mean low tide level.
Tidal Change(m) =High tide level(m) - Low tide level(m)
A deer is running across a meadow at a speed of 15 m/s. Katie is riding in a car that is traveling at 25 m/s in the opposite direction as
the deer. To Katie, the deer appears to be moving at a speed of 35 m/s.
Joan is standing still beside the meadow. To Joan, the deer appears to be moving at a speed of 15 ms.
Why do Katie and Joan believe the deer is traveling at different speeds?
A. Joan is not able to see clearly.
B. They are not the same height and weight.
C. They have different frames of reference.
D.Katie's car is going too fast.
Answer:
D
Explanation:
Answer:
C they have different frames of reference
Explanation:
which factors cause earth to experience seasons? Check all that apply.
the speed of earth's rotation
the tilt of earth's axis
the directness of Sun's rays
the distance from the Sun
the distance from the equator
the altitude of an area
Answer:
B, C
Explanation:
Answer:
the tilt of Earth’s axis
the directness of the Sun’s rays
Explanation:
got it right on edge on 12-13-22
A compound is found to contain 25.24 % sulfur and 74.76 % fluorine by weight. To answer the questions, enter the elements in the order presented above. 1. What is the empirical formula for this compound
Answer:
[tex]SF_5[/tex]
Explanation:
Hello!
In this case, when determining empirical formulas by knowing the by-mass percent, we can first assume we have 25.24 g of sulfur and 74.76 g of fluorine, so we compute the moles:
[tex]n_S=25.24g*\frac{1mol}{32.07g} =0.787mol\\\\n_F=74.76g*\frac{1mol}{19.00g}= 3.935mol[/tex]
Now, we divide the moles of both S and F by the fewest moles, in this case, those of S in order to determine the subscripts in the empirical formula:
[tex]S=\frac{0.787}{0.797}=1 \\\\F=\frac{3.935}{0.797}=5[/tex]
Therefore, the empirical formula is:
[tex]SF_5[/tex]
Best regards!
Iron forms both 2+ and 3+ cations. Write formulas for the oxide, sulfide, and chloride compounds of the 3+ iron cation.
Answer:
Fe2O3, Fe2S3 and FeCl3
Explanation:
The formular shows the number of atoms of element present in the compound. The number of atoms in turn depends on the charges. The goal is to have a neutral compound with oxidation number of zero.
Oxide:
Iron(Fe) has oxidation number (O.N) of +3, oxygen has O.N of -2. The formular with a balanced (Charge = 0) O.N number is; Fe2O3
Sulphide:
Iron(Fe) has oxidation number (O.N) of +3, sulphur has O.N of -2. The formular with a balanced (Charge = 0) O.N number is; Fe2S3
Chloride:
Iron(Fe) has oxidation number (O.N) of +3, chlorine has O.N of -1. The formular with a balanced (Charge = 0) O.N number is; FeCl3
3. What do you notice about the temperature of the substance in the test tube after it is placed in the beaker of water?
A)The temperature of the substance remains the same as it sits in the beaker of water.
B) The temperature of the substance decreases as it sits in the beaker of water.
C) The temperature of the substance increases as it sits in the beaker of water.
Answer:
C: The temperature of the substance increases as it sits in the beaker of water
Explanation:
This question was taken from a video where an attempt was made to investigate the changes in temperature when a substance undergoes change from it's solid phase to its liquid phase.
To do this, as seen in the video online, it shows a solid substance in a test tube being placed in a beaker of water.
From observation, the water in the beaker has a warmer temperature than the solid substance present in the test tube and this in turn makes the test tube gradually increase in temperature.
Thus, the solid substance will as well increase increase in temperature when it is placed in the beaker of water.
I will go to the app and give you brainly Est if u answer correctly ASAPPPPP
Answer:
C
Explanation:
I think it is C
Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients. FE2O3(s) Fe(s) O2(g)
Answer:
2Fe₂O₃(s) → 4Fe(s) + 3O₂(g)
Explanation:
The unbalanced reaction is:
Fe₂O₃(s) → Fe(s) + O₂(g)To balance the oxygen atoms, we put a 2 before Fe₂O₃ and a 3 before O₂(g) - so as to make the total of O atoms in both sides 6 -:
2Fe₂O₃(s) → Fe(s) + 3O₂(g)There are four Fe atoms on the left side and only one on the right side, so we put a 4 before Fe(s):
2Fe₂O₃(s) → 4Fe(s) + 3O₂(g)Now the equation is balanced: there is an equal number of both Fe and O atoms in both sides of the equation.
Which animal is a primary consumer in the Ethiopian Highlands?
Answer:
I believe it is the Ethiopian ibex
Explanation:
Answer:
I think it the Ethiopian ibex
Explanation:
im srry if it wrong.
hope this helps tho
Endothermic change is when energy enters a system. True or false?
Answer:
I think its false im not sure
Explanation:
1. inspiration meaning
Answer:
inspiration means
the process of being mentally stimulated to do or feel something, especially to do something creative.
Answer:
The process of being mentally stimulated to do or feel something, especially to do something creative.
Chemistry conversion:
Convert 3.0099 dumps to wigs.
6375.23 dumps = 1 wig
Round your answer to 5 sig figs.
dumps and wigs are made up units for this question.
Answer:
0.00047212
Explanation:
Given parameters:
Quantity of dumps = 3.0099 dumps
Unknown:
Amount of wigs in this dumps = ?
Solution:
Since it is given that;
6375.23 dumps = 1 wig
To find 3.0099dumps;
3.0099 dumps = x wigs
6375.23x = 3.0099
x = [tex]\frac{3.0099}{6375.23}[/tex] = 0.00047212 wig
The building blocks of DNA are like alphabet letters,
because they:
А: Are each associated with a particular sound
B: Can be used in a variety of languages
C: Each have an uppercase and a lowercase form
D: Spell out different instructions depending on their order
Help please
water H2O is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to share ___, and known as covalent bonds.
How is it possible that we have deserts if the water cycle provides water to earth's surface
Answer:
Even in a dry desert environment, the water cycle is taking place. The winds here blow up snow from the land and put it into the atmosphere, which is part of the water cycle. And the sun helps out, too, causing sublimation to occur, which causes snow to evaporate directly into water vapor gas
Explanation:
The gas in the discharge cell of a laser contains (in mole percent) 11% CO2, 5.3% N2, and 84% He. (a) What is the molar mass of this mixture
Answer:
[tex]MM_{mixture}=9.68g/mol[/tex]
Explanation:
Hello!
In this case, since the molar mass of gaseous mixtures can be determined via a weighted average containing the molar mass of each gas and the mole fraction (mole percent divided by 100) as shown below:
[tex]MM_{mixture}=x_{CO_2}M_{CO_2}+x_{N_2}M_{N_2}+x_{He}M_{He}[/tex]
Now, we plug in to obtain:
[tex]MM_{mixture}=0.11*44g/mol+0.053*28+0.84*4\\\\MM_{mixture}=9.68g/mol[/tex]
Best regards!
A local FM radio station broadcasts at an energy of 6.04E-29 kJ/photon. Calculate the frequency at which it is broadcasting.
Answer:
9.11×10⁷ Hz
Explanation:
From the question given above the following data were obtained:
Energy (E) = 6.04×10¯²⁹ KJ
Frequency (f) =?
Next, we shall convert 6.04×10¯²⁹ KJ to joule (J). This can be obtained as follow:
1 KJ = 1000 J
Therefore,
6.04×10¯²⁹ KJ = 6.04×10¯²⁹ KJ × 1000 J / 1 KJ
6.04×10¯²⁹ KJ = 6.04×10¯²⁶ J
Thus, 6.04×10¯²⁹ KJ is equivalent to 6.04×10¯²⁶ J.
Finally, we shall determine the frequency at which the FM radio station is broadcasting as follow:
Energy (E) = 6.04×10¯²⁶ J
Planck's constant (h) = 6.63×10¯³⁴ Js
Frequency (f) =?
E = hf
6.04×10¯²⁶ = 6.63×10¯³⁴ × f
Divide both side by 6.63×10¯³⁴
f = 6.04×10¯²⁶ / 6.63×10¯³⁴
f = 9.11×10⁷ Hz
Therefore, the frequency at which the FM radio station is broadcasting is 9.11×10⁷ Hz
2. If an object is buoyant, then it will
(3 Points)
fioat
sink
Answer: If an object is buoyant, then it will float
Explanation:
Buoyancy is the term which describes a type of force which is also known as the upthrust force. This is an upward force upward force exerted by a fluid that opposes the weight of an immersed object.
The objects which are lighter than water easily float on the water due to the existence of this force and the objects which are heavier than water sink in the water due to the existence of this force.
Thus if an object is buoyant, then it will float.
PLEASE HELP ASAPPPP I WILL VENMO YOU MONEY IF YOU DO THIS CORRECTLY Write the name for the following compounds.
1. N2O (Covalent)
2. Cu2S (Ionic)
Write the Chemical Formula for the following compounds.
3. Dichlorine heptoxide (Covalent)
4. Magnesium bromide (lonic)
Answer:
Dichlorine heptoxide=Cl₂O₇
magnesium bromide=MgBr2
Explanation:
A sample of g of pure aluminum metal is added to mL of M hydrochloric acid. The volume of hydrogen gas produced at standard temperature and pressure is
Answer:
V = 11.2L are produced
Explanation:
... Sample of 27g of pure aluminium, 3added to 333 mL of 3.0 M HCl..
Based on the chemical reaction:
2Al(s) + 6HCl(aq) → 2AlC₃(aq) + 3H₂(g)
Where 3 moles of hydrogen are produced when 6 moles of hydrochloric acid reacts with 2 moles of Al.
To solve this question, we need to determine limiting reactant converting each reactant to moles. With limiting reactant and the chemical reaction we can find moles of hydrogen and its volume at STP (T=273.15K; P=1atm), thus:
Moles Al-Molar mass: 26.98g/mol-:
27g * (1mol / 26.98g) = 1mol of Al
Moles HCl:
333mL = 0.333L * (3mol/L) = 1mol HCl
For a complete reaction of 1 mole of HCl are required:
1mol HCl * (2mol Al / 6mol HCl) = 0.333 moles of Al. As there is 1 mole of Al, Al is in excess and HCl is limiting reactant.
Moles of Hydrogen produced are:
1mol HCl * (3 moles H₂ / 6 mol HCl) = 0.5moles H₂ are produced.
Using ideal gas law:
PV = nRT
V = nRT/P
Where V is volume
n are moles: 0.5mol
R is gas constant: 0.082atmL/molK
T is absolute temperature: 273.15K
P is pressure: 1atm.
Solving for V:
V = 0.5mol*0.082atmL/molK*273.15K / 1atm
V = 11.2L are producedelectromagnetic waves can travel through matter as well as across space.
True or false
true becouse i sed so
10. Which of these is not a mixture? *
O Oil and Water
O Sand and Soda
O Diet Soda
O They are all mixtures.
Answer:
They all are mixture I think.
Describe the process of freezing ice cream in terms of heat flow.
Answer:
Freezing the mix is one of the most important operations in making ice cream, for upon it depend the quality, palatability, and yield of the finished product. Typically, freezing of ice cream is accomplished in two steps: (1) dynamic freezing, where the mix is frozen quickly while being agitated to incorporate air and to limit the size of ice crystals formed; and (2) static freezing, where the partially frozen product is hardened without agitation in a special low-temperature environment designed to remove heat rapidly. Although these steps primarily encompass freezing, or the formation of ice crystals, there are several other important processes that take place during this time that significantly impact the quality of ice cream. Both the dispersion of air bubbles and rearrangement of fat globules occur during the freezing steps.
Explanation: