Molecular Mass

24.5 mL of a solution 1.0 M bromine contain 0,0245 moles.

Molarity (M) is defined as moles of solute/liters of solution. Assuming the final volume is 500 ml (0.5 liters), then M = 1.2 moles/0.5 liters = 2.4 M

The number of moles 9,92.10e-5.

The number of copper atoms is 79,49.10e23.

The number of molecules is approx. 12.10.e+23.

The mass of 2,4 moles of chlorine is 84,08 g.

0,0178 moles of tin is equal to 0,107.10e23 atoms.

Impossible conversion

The equivalent is 1,6.10e-15 moles.

15 moles of 02 equal 480 g.

They are called isotopes. They differ in molecular mass due to the different number of neutrons.

The mass of 15 moles of tungsten is 2.757,6 g.

3,2x10e22 atoms of sulfur is equivalent to 0,053 moles.

10 g platinum is equal to 0,05 moles.

The volume is 50 %; the molar volume is 22,414 L.

0.0845 moles of tungsten is equal to 0,50887.10e23.

Approx. 10e-17 moles.

63 g of water are needed.

If the chemical reaction is:
2 HCl + Mg = MgCl2 + 2 H2
3143 moles of HCl produce 3143 moles of hydrogen
This volume at 0 0C is70 447,202litres.

120 grams of calcium contain 2,994 moles.

0,356 moles of zinc contain 23,27 g.

The answer is: 5 moles oxygen and 4 moles H2O.
The reaction is:
C3H8 + 5 O2 = 3 CO2 + 4 H2O

Increasing the amount of the solute in the solution the molarity and the density of this solution increases.

Molar mass of magnesium is 24gmol-1. mass of 1.5 mg mole 36g.

The answer is 0,0509 mole.