Answer:
Explanation:
To convert the mass to moles, divide the mass by the atomic weight of the element or compound.
To convert back to mass from the moles, multiply the moles by the atomic weight of the element or compound
1. Which has the greater blue or indigo light?
Answer:
Indigo wavelength is between
420
and
450
nm.
Blue wavelength is between
450
and
495
nm.
So blue has a greater
λ
than indigo.
Explanation:
Answer:
Indigo has greater frequency.
Have a great day!
How many grams of gasoline were
burned if 1.63 x 1023 molecules of
water were produced? Only report
number (no units) and use correct sig
figs.
Answer:
31.0 g C8H18
Explanation:
Gasoline is equivalent to C8H18
to convert molecule to gram you have to convert molecules to mols first.
Using Avocado's number we can figure that out.
(1.63 x 10²³ molecules C8H18) (1 mol C8H18/ 6.022 x 10²³) = 0.271 mols C8H18
Then we convert mols to grams using the molar mass of C8H18
C - 8(12.011) = 96.088 g/mol
H - 18(1.008) = 18.144 g/mol
add that together: 114.232 g/mol
(0.271 mol C8H18) (114.232 g/ 1 mol C8H18) = 31.0 g
31.0 g C8H18
P.S: SORRY IF THIS DOESNT HELP!! I dont know if they are talking about the actual formula for gasoline.
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
Answer:
The concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
Note: The question is incomplete. The complete question is as follows:
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
3H2(g)+N2(g)⇌2NH3(g)
At equilibrium, the concentrations are
[H2] = 5.0 M, [N2] = 8.0 M, and [NH3] = 4.0 M.
What were the concentrations of nitrogen gas and hydrogen gas that were reacted initially?
Explanation:
Given the following data:
Concentration of H2 at equilibrium = 5.0 M
Concentration of N2 at equilibrium = 8.0 M
Concentration of NH3 at equilibrium = 4.0 M
The given equilibrium reaction is,
Initial a b c
Change -3x -x +2x
Equilibrium (a-3x) (b-x) +2x
The value of x is calculated from the equilibrium of NH3
Concentration of NH3 at equilibrium = 4.0 M = 2x
x = 2.0 M
Substituting the value of x above
Initial Concentration of H2:
a - 3 × 2.0 M = 5.0 M
a = 6.0 M + 5 = 11.0 M
Initial Concentration of N2:
b - 2.0 M = 8 M
b = 8.0 M + 2.0 M
b = 10.0 M
Therefore, the concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
How many grams of Sn will be created when 114 grams of SnO2 react with excess H2? SnO2 + H2 ->Sn + H2O
I
Explanation:
CNN vfbtgnynynynynyuybunujy
Water can exist in all three states of matter.
Describe the arrangement and movement of particles in each of the three states of matter. Explain what happens to the particles in a liquid during boiling.
I'll give someone brainly and thanks if they answered the question correctly. 30 points!!
Answer:
The particles in a liquid move very quickly due to heat while it is boiling and gradually turns to gas
How many particles are present in a 56.9 mole sample of calcium hydroxide?
Answer:
Particles? Calcium hydroxide does not exist as discrete molecules, but as a network solid. The only way you would have separate particles, is if the calcium hydroxide was dissolved in a boatload of water. Ca(OH)2 is not all that soluble in water. Nonetheless, assume a lot of water, enough to dissolve 56.9 moles.
Ca(OH)2 --> Ca2+ + 2OH-
56.9 moles Ca(OH)3 x (3 moles ions / 1 mol Ca(OH)2) = 170.7 mol ions
==================
Percent composition of CuNO3......molar mass = 125.5 g/mol
Cu.... 1 x 63.5 / 125.5 x 100 = 50.6% Cu
N ......1 x 14.0 / 125.5 x 100 = 11.2% N
O .....3 x 16.0 / 125.5 x 100 = 38.2% O
(hope this helps can i plz have brainlist :D hehe)
Explanation:
Which of the 3 molecules: Methane, Propane, Butane would release the most energy when combusted?
Answer:
butane
Explanation:
How do ionic bonds form between atoms?
The ion which forms from element 36 is known as
A. Krypton ion
B. Kryptonite
C. kryptonide ion
D. this ion does not exist
HELP ASAP I will mark brainliest
Answer: The last one I think
Explanation:
Answer:
10623.0
Explanation:
Because 3541 is speed per hour
You need to find 3 hours
so multiply 3541 x 3
3541 x 3 = 10623
10623.0Which layer over time due to chemical and physical weathering leads to the other layers?
Answer:
chemical weathering occurs on the surface of minerals, the water and acids that control chemical weathering require access to the surface. Physical weathering breaks the rock to provide that surface
(06.06 MC)
A gas has a mass of 3.82 g and occupies a volume of 0.854 L. The temperature in the laboratory is 302 K and the air pressure is 104 atm Calculate the molar
mass of the gas.
Answer:
Explanation:
3.12
Answer:
its 3.12
Explanation:
Which of the following is not a part of the digestive system
A. Mouth
B.Esophagus
C.Intestines
D.Kidneys
Answer:
Kidneys •_•
Hope this helped <3
I WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!! PLZZZZZZZZZ HELPPPPPPPPPPPPPP
Explain how proper motion will affect the constellation as seen from the earth.
PLEASE HELP ASAP I'LL MARK BRAINLIEST
Thank you :)
8. A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013.
Does this statement describe the meteor’s speed or velocity? 1pt
9. Why did you choose the answer above (explain why)? 1pt
Answer:
Its velocity was 7.8 km/s northward.
Explanation:
Because the meteor was only 45 m wide and was 27,700 km above Earth's surface it was not visible with the aid of a telescope.
For each of the following unbalanced equations indicate how many moles of the second reactant would be required to react exalt with 0.275 mole of the first reactant. Balance the equation.Co(s) + P4 (s) Co3P2 (s)
Answer:
0.183 mol
Explanation:
so balenced equation is 6Co+4P=2(Co3P2)
so so the ratio is 6:4
so .275/6*4
=0.183 mol I think
The Answer will be: 0.183 mol
so that the balanced equation is 6Co+4P=2(Co3P2) When the ratio is 6:4so that .275/6*4
=0.183 mol.
When According to the A balanced chemical is equation has been equal numbers of atoms that are for each element they are involved in the reaction and its represented on the reactant and its product sides.Also that This is a better requirement that makes the equation must be satisfied and also that to be consistent with the law of conservation of the matter. then It may occur that it is confirmed by simply summing the numbers of atoms and also molecules on it either side of the arrow and it's comparing these sums to ensure that they are equal.( 1 CO 2 molecule × 2 O atoms CO 2 molecule) + ( 2 H 2 O molecule × 1 O atom H 2 Molecule ) = 4 O atoms
Learn more about:
https://brainly.com/question/13719614
what type of bond holds different water molecules together
Why does lowering the pressure cause a liquid to boil?
A. It becomes easier for molecules to escape.
B. It pushes molecules out of the liquid.
C. It causes the temperature to rise.
D. It changes the volume of the liquid.
Lowering the pressure in a container will cause the liquid in the container to boil faster because it becomes easier for the molecules to escape.
What causes boiling?Boiling happens when the vapor pressure of a liquid equals the atmospheric pressure.
By lowering the atmospheric pressure, the vapor pressure of a liquid takes a lower time to equal the atmospheric pressure.
Thus, it becomes easier for the molecules of the liquid to escape from each other.
More on boiling and pressure can be found here: https://brainly.com/question/2510654
Explain why the elements in group 7 have 7
valence electrons.
Answer:
The periodic table was made that way by the scientists who created it
Explanation:
to make things easier for the users.
What mass of Cl2 can be produced at STP when 3.3 moles of HCl are reacted with excess MnO2?
In the cycle, after a new moon, _______________ means light appears on the _____________ side of the moon and continues to ________________.
Answer:
Explanation:
In the cycle, after a new moon, waxing means light appears on the right side of the moon and continues to increase.
Using the average atomic masses given inside the front cover of this book, calculate the number of atoms present in each of the following sample. a. 1.50 g of silver, Ag
b. 0.0015 mole of copper, Cu
C. 0.0015 g of copper, Cu
d. 2.00 kg of magnesium, Mg
e. 2.34 oz of calcium, Ca
f. 2.34 g of calcium, Ca
g. 2.34 moles of calcium, Ca
Answer:
c. 0.0015 g of coopet, cu
Explanation:
What is the percent composition by mass of suifur in Na2SO?
(Molar mass of Na2SO.= 142 g/mol)
Answer:
22.5%
Explanation
% composition = Molar mass of S
------------------------ x 100
Molar mass of Na2SO4
= 32.065
------------ x 100
142
=0.225 x 100
= 22.5%
HELP NEEDED
How many nanoliters are in 1 liter. Show work
1 000 000 000 nanoliters
What is the number of moles of 60.7 liters of oxygen molecules?
Answer:
2.17 moles of gas.
Explanation:
In a sample of double-stranded DNA, 12% of the nitrogenous bases are guanine (G). What percentage of the nitrogenous bases in the sample are cytosine
Answer:
12%
Explanation:
The percentage of Guanine and Cytosine in DNA are equal to each other, as one molecule of guanine bonds with one molecule of cytosine.
If 12% of the nitrogenous bases are guanine, then another 12% will be Cytosine.Conversely, the percentage of adenine and thymine in DNA are equal to each other.
Given the reaction: 2 H2 + O2 => O2 = 2 H2O.
What is the total mass of water formed when 497.80 g of oxygen reacts with hydrogen?
The amount of matter in an object is ___ and a common unit is the ___.
A. mass, mL
B. volume, mL
C. volume, gram
D. mass, gram
Answer:
The answer is D
Explanation:
Mass is the amount of matter in an object and gram is the common unit of measurement of mass
A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C.
Solve the problem for the pressure of oxygen.
in kPa plz
Answer:
The pressure of gas in kilopascals is 55.9
Explanation:
variables given :
volume
temperature
moles
unknown variables :
pressure
Select the correct algebraic form for the equation to be used for this calculation.
p= nRT/V
Solve the problem for the pressure of oxygen.
Answer:
55.9 kPaLightning storms trigger wildfires that burn up a lot of the plants and grasses in the ecosystem. Trees are mostly spared. what is the cause of this
Answer:
B
Explanation:
:)