Avogadro's constant

How many molecules of iodine are in 0.1 mole of iodine, I₂?

• 6.02 x 10²⁵

• 6.02 x 10²²

• 1.204 x 10²⁴

• 6.02 x 10²³

How many atoms would be in 8.4g of butane (C₄H₁₀)?

• 50.568 x 10²³

• 12.204 x 10²³

• 0.872 x 10²³

• 5.04 x 10²³

Which of the following has more number of hydrogen atoms in it?

• 0.1 mole H₂O

• 0.05 mole Al(OH)₃

• 0.025 mole C₂H₆

• 0.015 mole of C₆H₁₂O₆

How many atoms are in 16g of oxygen gas ?

• 6.02x10²³ atoms

• 9.6x10²⁴ atoms

• 1.20x10²⁴ atoms

• 3.01x10²³ atoms

How many anions are in 20 cm³ of 0.1 mol/dm ³ CaCl_2?

• 1.2 x 10²⁴

• 3.6 x 10²³

• 0.012 x 10²³

• 2.4 x 10²¹

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.050 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

Tags

NGSS.HS-PS1-7

What is the volume occupied by 5.11 x 10 ²³ molecules of sulfur dioxide?

• 30.76 dm³

• 20.4 dm³

• 28.3 dm³

• 0.8488 dm³

Which of the following has the greatest mass?

12.0 x 10²¹ atoms of zinc

0.12 x 10²³ atoms of manganese

0.012 x 10²⁴ atoms of argon

1.20 x 10²² atoms of sulfur

(Avogadro's constant = 6.02x10^23)

• zinc

• manganese

• argon

• sulfur

Which of the following has the same number of particles as there are in 240 cm³ of CH₄ ?

• Number of atoms in 0.2 g of HF

• Number of ions in 25 cm³ of 0.1 mol dm^-3 Ba(OH)₂

• Number of cations in 0.53 g of Na₂CO₃

• Number of molecules in 2.4 dm³ of SO₃

What mass of a sample of CO contains 1.2 x 10²⁴ atoms in it.

• 28 grams

• 56 grams

• 6.02 grams

• 1.2 grams