Chemistry Conversions

How many grams of NaOH do you have to dissolve to make 725 mL of a 2.5 M solution?

• 48.4 g

• 18.2 g

• 72.5 g

• 31.9 g

How many moles are in 72.9 g of HCl?

• 2.00 moles

• 1.34 moles

• 2.97 moles

• 6.02 x 10²³

How many grams are in 3.01 × 10²⁴ molecules of (NH₄)₂SO₄? (Molar Mass (NH₄)₂SO₄ = 132.17 g/mol

• 330.28 g

• 496.81 g

• 660.85 g

• 872.16 g

Tags

NGSS.HS-PS1-7

15.6 L = ___________ mL

• 15,600

• 156,000

• 1,560,000

• 15,600,000

Which conversion fraction would be needed?

• 
• 

The number 6.02 x 10²³ is called...

• Bohr's number

• Avogadro's number

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NGSS.HS-PS1-7

How many atoms are in 3.5 moles of arsenic atoms?

• 5.8 x 10^-24

• 7.5 x 10¹

• 2.1 x 10²⁴

• 1.7 x 10²³

If an atom of Fluorine has an atomic mass of 19 amu, it has a Molar mass of ____

• 19 lbs.

• 19 kg

• How am I supposed to know?

• 19 g/mol

Tags

NGSS.HS-PS1-1

48.86 g of cobalt is equal to how many moles of cobalt?

• 1319 moles

• 1.8 moles

• 0.829 moles

• 1.2 moles

Tags

NGSS.HS-PS1-7

How many moles are in 32 grams of Oxygen (O)?

• 3

• 2

• 1

• 4

Tags

NGSS.HS-PS1-7