Chemistry How many moles are in 100 grams of sodium chloride (NaCl)?

[Caitex3]

1.

i tried some of them but i am not sure if they are right.
What is the mass of one mole of aluminum?


I don't understand how to do this and


What is the mass of one mole of hydrogen?

1.008 g
2.040g
3.000 g
1008 g



What is the mass of one mole of carbon dioxide, CO2?

3.4007 x 102 g
2.2 x 102 g
4.4009 x 101 g
22.09 x 102 g


What is the mass of one mole of sulfuric acid?

9.8079 x 101 g
98.079 x 103 g
980.79 x 105 g
98079 x 101 g


How many moles in 3.00 g H2SO4?

.059 mol
.390 mol
4.03 mol
.030 mol




How many moles in 12.0 g CH4?

.748 mol
22.5 mol
.495 mol
.952 mol




How many moles in 3.40 x 101g CaO?

.0900 mol
.0456 mol
.945 mol
.606 mol




How many moles in 13.4 g SO2?

.45 mol
.21mol
.97 mol
.25 mol




What is the mass of 0.369 mol N2?

10.337 g
14.986 g
12.031 g
15.0987 g




What is the mass of 10.0 mol Ca(NO3)2?

1596 g
12906g
1641 g
1498 g


What is the mass of 1.94 x 10-3 mol C6H12O6?

.340 g
.456 g
.905 g
22.5 g


What is the mass of 0.0112 KCl ?

5.956 g


How many particles in 25.9 mol Fe ?

1.56 x 1014


How many particles in 0.30 mol NaCl ?

1.8 x 1034

How many moles in 4.7 x 1024 atoms Cu?

7.8

How many moles in 8.30 x 1025 molecules H2O?


156

 

[+Minkie+]

For the first few questions n=M/m is your equation.
n= # of moles
M= mass in Kg
m= molecular mass (sum of neutrons and protons)

Not to sure about the molecule and particle questions.
I'm pretty sure there is 6.02*10^23 atoms in 1 mole.

 

[Plastic Photon]

This is solved by units where moles=g/g/mole and moles equals atoms/atoms/mole, these two should help solve for exchanges to mass and number of atoms.

 

[Caitex3]

thanks:) I will try it and see if it helps you guys:)