Mass to Atoms

What is the molar mass of one molecule of Nitrogen N₂?

• 14.01 amu

• 14.01 g

• 28.02 g

• 28.02 amu

Answer explanation

The molar mass of one molecule of Nitrogen N2 is 28.02 g because the atomic mass of nitrogen is 14.01 g/mol, and there are two nitrogen atoms in one molecule of N2.

Tags

NGSS.HS-PS1-7

What is the atomic mass of one atom of Nitrogen?

• 14 amu

• 14 g

• 14 kg

• None of these

Answer explanation

The atomic mass of one atom of Nitrogen is 14 amu, which stands for atomic mass unit. It is a unit used to express atomic and molecular weights.

What is the mass of one hydrogen atom?

• 1 amu

• 1 g

• 2 g

• 2 amu

Answer explanation

The mass of one hydrogen atom is 1 amu (atomic mass unit), which is the correct choice among the given options.

How many atoms are contained in a 456 g sample of carbon dioxide?

• 10.34 atoms

• 6.237 x 10²⁴ atoms

• 1.871 x 10²⁵atoms

• 2.079 x 10²⁴ atoms

What is the ATOMIC MASS of this Atom?

Mathematical Equivalence

ON

Tags

HS-PS1-1

Use your understanding of Atomic Mass to complete the Table.

e

f

g

h

6

63

9

1

24

12

5

8

Tags

HS-PS1-1

Which of the following describes the relationship of these isotopes?

Isotopes have (a)   mass numbers, but (b)   number of protons.

• different

• the same

Answer explanation

The isotopes of hydrogen have different mass numbers but the same number of protons, making the correct answers 'different' and 'the same'.

Tags

HS-PS1-1

How many atoms would be contained in 454 grams of iron (Fe)?

• 6.02x10²³ atoms

• 8.14 atoms

• 4.90x10²⁴ atoms

• 55.85x10²³ atoms

What is the atomic mass of one atom of Carbon?

• 12 amu

• 12 g

• 12 kg

• None of these

How many atoms are in 12 grams of Carbon?

• 1 mole

• 6.022 x 10^23 atoms

• 12 atoms

• 24 atoms