Moles, grams, particles and litres

How many particles are in one mole of a substance?

• 6 x 10²³

• 23 x 10⁶

• 6.000 x 10 ²³

• One small mammal

Which of the following would have the largest mass?

• 1 mole of Carbon

• 2 moles of Hydrogen H₂

• 0.5 moles of Oxygen O₂

• 2 moles o Chlorine

What is the mass of 4 moles of Boron?

• 44g

• 43.524g

• 43.524kg

• 10.881g

What is the molecular mass of Flourine gass F₂?

• 19g

• 37.996g

• 18.998g

• 38g

A student weighed out 20g of Copper Sulphate CuSO₄ using a balance. How many moles was this?

• 0.124 moles

• 0.125 moles

• 0.126 Moles

• 7.98 moles

A student weighed out accurately 0.21 moles of Sodium Chloride NaCl. How many particles did this amount to?

• 2.86 x 10²⁴

• 6 x 10²³

• 1.3 x 10²³

• 1.26 x 10²³

Imagine a scientist has 10 million particles of gold, How many grams does he have?

Take the avodadro constant to be 6 x 10²³

• 3.28g

• 3.28kg

• 3.28 x 10^-15g

• 3.29g

• 3.29 x 10^-15g

A scientist synthesised 19g of carbon dioxide. How much space would this occupy at S.T.P

1 mole = 22.4L at S.T.P

• 44.8L

• 9.67 L

• 51.88 L

• 35.46 L

A container contains 5 litres of gas at S.T.P. How many particles does it contain?

• Loads

• 3 x 10²⁴

• 1.339 x 10²³

• 1.338 x 10²²