The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of

Question

3 years ago

15

hydrogen and one mole of helium.
A) 4.81 x10-26 g

B) 0.029 g

C) 1.7 x 1022 g

D) 0 grams

2 answers:

CaHeK987 [17] · Answer 1 · 2022-02-05T23:46:36+03:00

7 0

4 moles of hydrogen = 4 * 1.008 = 4.032 grams

1 mole of helium = 4.003 grams

Difference is 4.032 - 4.003

= 0.029 g

melomori [17] · Answer 2 · 2022-02-06T01:46:41+03:00

Answer:

The correct answer is option B.

Explanation:

The atomic mass of hydrogen-1 = 1.008 g/mol

The atomic mass of helium-4 = 4.003 g/mol

Mass of 4 mole of hydrogen = 4 × 1.008 g/mol = 4.032 g

Mass of 1 mole of helium = 1 × 4.003 g/mol = 4.003 g

Difference of between 4 moles of hydrogen and 1 moles of helium :

4.032 g - 4.003 g = 0.029 g