4.1) What is the chemical formula for methane?
CH4 / hydrogen carbide
4.1) When a compound contains a metal and a non-metal, which name
goes first?
First the metal, then the non-metal
4.2) What is the formula of hydrogencarbonate ion?
HCO3 -
4.3) H2 + O2 =?
2H2O
4.4) What does �s�, �l�, �g� and �aq� stand for?
Solid, liquid, gas and aqueous (solution)
5.1) What does the symbol (A r)
stand for?
Relative atomic mass.
5.2)How do hoy calculate the relative atomic mass?
Mass/moles
5.3) What does CaCO3+ 2HCl gives you as a result?
CaCl2+CO2+H2O
5.4) What is the molar gas volume?
The molar gas volume is the volume of a mole at room temperature and pressure
(gas=24dm3)
5.5) How do you calculate the % of purity?
(Mass of pure product/mass of impure product)*100