Stogs GCSE Interleaving Calculations L

What is the relative formula mass of carbon dioxide, CO₂?

The diagram shows a molecule of paracetamol. Calculate its relative formula mass (M_r).

The balanced symbol equation for the reaction is: $Pb\left(NO_3\right)_2\left(aq\right)\ +\ 2NaI\left(aq\right)\ \rightarrow\ PbI_2\left(s\right)\ +\ 2NaNO_3\left(aq\right)$  
The student uses 2.4g of lead nitrate. The total mass at the end of the reaction is 3.9g. Calculate the mass of sodium iodide used.

What is the relative atomic mass of magnesium? The isotopes of magnesium and their percentage abundances are: ²⁴Mg 78.6%, ²⁵Mg 10.1%, ²⁶Mg 11.3%.

What is the relative atomic mass of copper? ⁶³Cu 69% and ⁶⁵Cu 31%.

What is the mass of 2 moles of nitrogen molecules, N₂?

What is the mass of 0.1 moles of sulphur dioxide molecules, SO₂?

Calculate the number of moles of CO₂ molecules in 88 grams of carbon dioxide.

Calculate the number of moles of CH₄ molecules in 3.2 g of methane.

6.02 x 10²³ is the .......................... constant.