Question

HEY MATE

plz help me

1] a sample of aluminium has mass of 54.0g . what is the mass of the same no. of magnesium atoms?

2] the volume of 1 mole of gas at standard temperature and gas is ...

3] one mole of P4 molecules contains -

Answer 1

hello mate..

these all our based on moles fact

ans 1- the molecular weight of aluminium is 27 it means that there are 2 moles of aluminium.

1. so two moles of magnesium has 48.6g approximately
2. the volume of 1 mole gas at STP is 22.4 ltr
3. one mole of p4 molecules contain 6.023 × 10^23 molecules

Answer 2

HERE IS YOUR ANSWER

ANSWER 1.

Molar Mass of Al = 27g/mol

54.0 g of Al = 54.027 = 2 mole

Molar mass of Mg = 24.3 g

Molar mass of 2g Mg = 48.6 g

ANSWER 2.

Standard temperature and pressure (STP) is defined as 0°C (273.15 K) and 1 atm of pressure. The molar volume of a gas is the volume of one mole of the gas at a given temperature and pressure. At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L

ANSWER 3.

1 mole of P4 molecule contains 4 moles of P atom, therefore 0.25 mole of P4 molecule contains 1 mole of P atom. Therefore, 0.25 mole of P contains 6.023*10^23 atoms. Now, 1 mole P4 will have a total of 6.022×10²³ molecules.

HOPE IT HELPS YOU! ! ! ! ❤