Question

Which of the following contains largest number of atoms? 1. 4gH2,2. 16g O2, 3. 28g N2, 4. 18g H2o

Answer 1

Answer: Hi there,

The answer is 1- 4g of H2

Explanation: key

one mole of substance contains 6.02×10^23 unit

One Mole =

sample mass ÷ molar (atomic) mass

☆ 1- molar mass of H2 = 1×2 =2 so,

mols = 4 ÷ 2 = 2 mol

Atoms = 2× 6.02×10^23 × 2 = ◇2.4×10^24 atom

☆ 2- molar mass of O2 =16×2= 32 so,

Mols = 16÷32 = 0.5 mol

Atoms = 0.5 × 6.02×10^23 × 2 =

◇6.02×10^23 atom

☆ 3- molar mass of N2=14×2= 28 so,

Mols = 28÷28 = 1 mol

Atoms = 1×6.02×10^23 ×2 =

◇ 1.2×10^24 atom

☆ 4- molar mass of H2O = 16+2=18

Mols = 18÷18=1 mol

Atoms = 1×6.02×10^23 × 3 =

◇1.8×10^24 atom

♤ So , the biggest number of atom is

( 1 ),

♡ Hope the answer helps you

♡ Plz mark it as brainliest