Chemistry (C2) Revision cards for C2 2.5 / 5 based on 3 ratings ? ScienceChemistryGCSEAll boards Created by: Maisie Wheeler-HolesCreated on: 27-10-11 08:02 Mass/Charge What is the mass of proton, neutron and electron? 1 of 8 Proton- Mass 1/ Charge +1 Neutron Mass 1/ Charge 0 Electron Mass (Very small)/ Charge -1 2 of 8 what is... CaCo3 HNo3 MgO NH3 KMnO4 C2H5OH Ca(OH2) Nacl Na K Cu 3 of 8 CALCIUM CARBONATE NITRIC ACID MAGNESIUM OXIDE AMMONIA POTASSIUM MAGANATE ETHANOL CALCIUM HYDROXIDE SODIUM CHLORIDE SODIUM POTASSIUM COPPER 4 of 8 What is a mole? RELATIVE ATOMOC MASS AND RELATIVE FORMULA MASS = mole 5 of 8 EXAMPLE! The Mole = Relative atomic/formula mass So 1 mole of carbon = 12 g 6 of 8 Percentage mass and empirical formula MgO --> 24g (Mg) 16g (O) 16+24=40 16/40 = 0.4 x100 = 40% (of oxygen) Therefore Magneisum is 60% 7 of 8 Percentage Mass (%) = Mass of element (Ar) / Relative formula mass (Mr) 8 of 8
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