How many moles are in 3.6 g H2 O?

Answer 1

Number of moles are calculated using the equation n=m/M

where n is the number of moles, m is the mass of the substance and M is the molar mass of the substance.

Molar mass of water = 18 g mol-1

Number of moles of water = 3.8 g /18 g mol-1

= 0.21 mol

Number of moles of H in H2O =2

(the subscript next to the chemical symbol of an element indicates the number of moles of that element in that molecule)

Number of moles of H in 3.8 g of H2O = 2 x 0.21 mol

= 0.42 mol

Answer 2

How many moles of water are in 3.6 grams of water? 2 mol of hydrogen plus 1 mol of oxygen will result in 1 mol of water; so 2 H atom gram-mol (2g) + 1 O atom gram-mol (aprox 16g) = aprox 18 grams; or 1 H2O mol = aprox 18g; so 3.6g = aprox 0.2 H2O mol (3.6/18)

Answer 3

Number of moles : mass / mass per mole : 3.8 / (1*2)+16
: 3.8 / 18
: 0.2375

Answer 4

Moles = Mass(g)/Mr

Mr of H2O = (1 x 2) + (1 x 16) = 18

Moles = 3.7 / 18 = 0.206 moles(3 sig.)

OR

37/180 moles (fraction)

Answer 5

There are 2 moles of water in 36grams.

Reason explaining why:

36g H20 multiplied by the molar mass (which is 1mol/ 18gH20) equals 2molesH20.

Answer 6

1 mole = 18 g.

so 3.2 mole = 57.6 g of water.

Answer 7

Mass ÷ Molar mass = moles

3.00 grams ÷ 18.0 = 0.167 moles H2O

Answer 8

3.6 x (6.022x10^23)

Answer 9

3.6/18 = 0.2 moles water.