How many atoms are present in a 13.5 gram sample of beryllium?

• 1.5 particles

• 9 particles

• 4.03 x10²³ particles

• 9.02 x10²³ particles

A sample of silver contains 5.71 x 10²² atoms. How many moles of silver are present?

• 3.43 x 10⁴⁶ moles

• 0.0529 moles

• 0.0948 moles

• 10.5 moles

How many atoms are present in a 0.0254 mole sample of gold?

• 0.25 atoms

• 1.528 x 10²² atoms

• 4.22 x 10^-25 atoms

• 5 atoms

Tags

NGSS.HS-PS1-7

Determine the mass of 2.40 moles of C₆H₁₂

• 201 g

• 115 g

• 230. g

• 353 g

What is the total mass, in grams, of a 0.75 mole sample of SO₂?

• 16 g

• 24 g

• 32 g

• 48 g

Calculate the mass of iron in a sample of iron ore containing 2.61x10²³ iron atoms.

• 0.433g
• 24.2g
• 44g
• 6.02g

Tags

NGSS.HS-PS1-7

How many molecules are present in a 135 g sample of Teflon, which has a formula of C₂F₄?

• 6.13 x 10²³ molecules

• 5.13 x 10²³ molecules

• 8.13 x 10 ²³ molecules

• 9.13 x 10²³ molecules

What is the volume of 5.62 moles of O₂?

• 125.9 L

• 0.25 L

• 179.8 L

• 0.18 L

What is the volume (in liters) of 3.20 moles of H₂O?

• 71.7 L

• 0.14 L

• 0.17 L

• 57.6 L

What is the number of moles in 9.63 L of H₂S gas at STP?

• 3.54 mol

• 0.104 mol

• 216 mol

• 0.430 mol