Chemistry, 02.09.2019 18:20 nyraimccall408

Determine the molarity for each of the following solution solutions:
(a)0.444 mol of cocl2 in 0.654 l of solution
(b) 98.0 gram of phosphoric acid, h3po4, in 100 l of solution
(c) 0.2074 g of calcium hydroxide, ca(oh)2 in 40.00 ml of solution
(d)10.5 kg of na2ao4.10h2o in 18.60 l of solution
(e) 7.0 x 10-3 mol of l2 in 100.0 ml of solution
(f) 1.8 x 104 mg of hcl in 0.075 of solution

Answers: 2

Show answers

Answers

Answer from: rebtav

A) 0,679 mol/L

B) 10 mol/L

C) 0.07000 mol/L

D) 3.97 mol/L

E) 0.070 mol/L

F) 6.6 mol/L

Explanation:

A) Molarity is the ration between the number of moles ins solution over the solution volume in liters.

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{0.444}{0.654} =0.679$

B) Upon consulting a periodic table one can find the atomic masses of each element present at a given molecule.

H=1.00 g/mol P=30.97 O=16.00

By adding the masses of the atoms in a molecule, we get its molecular weight.

H3P04 molecular mass is 3x1.00+30.97+4x16.00=97.97g/mol

The molar mass is used to calculate the number of moles of a molecule in a given sample.

$n=\frac{sample}{molar mass} = \frac{98.0}{97.97} =1.00$

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{1}{0.1} =10$

C) Upon consulting a periodic table one can find the atomic masses of each element present at a given molecule.

H=1.00 g/mol Ca=40.08 O=16.00

By adding the masses of the atoms in a molecule, we get its molecular weight.

Ca(OH)2 molecular mass is 2x1.00+40.08+2x16.00=74.08g/mol

The molar mass is used to calculate the number of moles of a molecule in a given sample.

$n=\frac{sample}{molar mass} = \frac{0.2074}{74.08} =0.002800$

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{0.002800}{0.0040} =0.07000$

D) Upon consulting a periodic table one can find the atomic masses of each element present at a given molecule. (assuming you meant Na2SO4)

Na=22.99 g/mol S=32.07 O=16.00

By adding the masses of the atoms in a molecule, we get its molecular weight.

Na2SO4 molecular mass is 2x22.99+32.07+4x16.00=142.05 g/mol

The molar mass is used to calculate the number of moles of a molecule in a given sample.

$n=\frac{sample}{molar mass} = \frac{10500}{142.05} =73.9$

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{73.9}{18.60} =3.97$

E) Molarity is the ration between the number of moles ins solution over the solution volume in liters.

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{0.0070}{0.1000} =0.070$

F) Upon consulting a periodic table one can find the atomic masses of each element present at a given molecule.

H=1.00 g/mol Cl=35.45

By adding the masses of the atoms in a molecule, we get its molecular weight.

HCl molecular mass is 1.00+35.45=36.45g/mol

The molar mass is used to calculate the number of moles of a molecule in a given sample.

$n=\frac{sample}{molar mass} = \frac{18}{36.45} =0.49$

Therefore the molarity of such solution is:

$M=\frac{n}{L}=\frac{0.49}{0.075} =6.6$

Answer from: Quest

beta decay is the answer

Answer from: Quest

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Another question on Chemistry

Chemistry, 21.06.2019 19:30

Which statement about the stamps is correct?

Answers: 1

Answer

Chemistry, 22.06.2019 05:30

Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *

Answers: 1

Answer

Chemistry, 22.06.2019 19:00

What is the molecular weight of copper

Answers: 1

Answer

Chemistry, 22.06.2019 20:20

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)

Answers: 1

Answer

You know the right answer?

Determine the molarity for each of the following solution solutions:
(a)0.444 mol of cocl2 i...

Questions