Q.1.
How many atoms of hydrogen, sulfur and oxygen are there in sulfuric acid, formula H SO ?
Q.2.
What non-metals are found in sodium silicate?
Q.3.
What do their names tell you about sodium sulfide and sodium sulfate?
Q.4.
The main gas used in a stink bomb is the highly toxic hydrogen sulfide. What does this compound contain?
Q.5.
How many atoms of oxygen in this thermal decomposition - CaCO ⇌ CaO +CO
Q.6.
You might find it easier to have a pen and paper handy for this and the rest of the questions. A student is balancing an equation that involves Na SO . She needs to have 6 atoms of sodium, how would she write this in her answer?
Q.7.
Bill needs to balance an equation that involves aluminium oxide, formula Al O . He requires a total of 12 oxygen atoms to balance his equation. What should he write?
Q.8.
Balance the equation Na + H O → NaOH + H .
Q.9.
Balance the equation for the reaction CuO + Al → Cu + Al O
Q.10.
In a blast furnace, there are several chemical reactions. The main one for smelting the iron from the iron ore is Fe O + CO → Fe + CO . Which numbers should be put in front of each formula in order to balance the equation?