Molar Conversion

How many moles are in 25 grams of sodium (Na)?

• 2.5 moles

• 1.08 moles

• 0.5 moles

• 0.25 moles

How many atoms are in 3 moles of oxygen (O2)?

• 9 x 10⁵⁷

• 1.81 x 10²⁴

• 3 x 10²⁴

• 6 x 10¹⁰

1 mole is equivalent to 6.02 x 10²³ atoms

• False

• True

Tags

NGSS.HS-PS1-7

• 1.25 moles

• 1.50 moles

• 1.75 moles

• 2.00 moles

• 18 g

• 36 g

• 72 g

• 144 g

To convert from grams to moles, you should multiply by ....

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Find the mass in grams of 2.25 x 10²⁴ atoms of calcium (Ca).

• 40.0 grams

• 255.1 grams

• 150 grams

• 9.02 x 10²⁴ grams

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 molar mass of water (H2O)?

• 16.0 g/mol

• 22.9 g/mol

• 20.0 g/mol

• 18.0 g/mol

What is the definition of molar mass?

• number of grams per one mole of a substance

• whole number ratio that is a multiple of a chemical formula

• simplest, whole number ratio of a chemical formula

• 6.02 x 10²³ particles per one mole of a substance

Tags

NGSS.HS-PS1-7