I get 2 marks for this so plz answer. How many particles are in a 53.2 L volume of gas at STP?

The number of particles= 1.43 x 10²⁴ particles

Given

53.2 L volume of gas at STP

Required

The number of particles

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

So mol for 53.2 L :

= 53.2/22.4

= 2.375 moles

1 mol = 6.02 x 10²³ particles (molecules, atoms, ions)

The number of paricles for  2.375 moles gas :

= 2.375 x 6.02 x 10²³

= 1.43 x 10²⁴ particles

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2