Question

Fill in the blanks with their solutions plz​

Answer 1

(a)Number of moles:

2moles....4moles....2moles....4moles

(b) Masses:

42g.... 36g.... 74g.... 4g

(c) Number of H atoms:

6x10^23... 1.2x10^24... 6x10^23... 1.2x10^24

(d) Total number of atoms:

6x10^2... 1.2x10^3... 10^3... 8x10^2

Hope it helps!!

Answer 2

Answer:

B.

$No. of mole =\frac{given\\\\mass}{molar\\ mass}$

Given mass = 2 × 42 g

                    = 84 g

C

$1 \mole\ contains =$ 6.023 × 10²³ atoms

2 moles of H atom contains = 2  ×  6.023 × 10²³ atoms

                                               =1 .2046 × 10²⁴ atoms