We looked at calculating and using moles for solids using mass in unit 1.7. Here we are using moles of a solute dissolved in a solution and moles of a gas to carry out calculations.
What are the units for concentration?
What is the concentration of 0.5 moles of HCl dissolved in 250cm3 of solution?
Using the equation, calculate the atom economy of reduction of iron(III) oxide using carbon, where iron is the desired product.
2Fe2O3 + 3C -> 4Fe + 3CO2
What is the empirical formula of octane C8H18?
Which of the following statements about hydrated salts is false?
The degree of hydration can be determined by heating it to constant mass and taking measurements before and after heating.
When heated, the water of crystallisation evaporates to leave the anhydrous salt.
The mass of the anhydrous salt will be greater than the mass of the hydrated salt.