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Worksheetschapter 1 matter
Total questions: 10
Worksheet time: 7mins
what is the meaning of isotopes?
atom of the same element with the different proton number but same nucleon number
atom of the same element with the same proton number but different nucleon number
atom of the same element with the same proton number and nucleon number
none of these
isotopes notation for calcium that contains 20 electrons
unit for molarity?
mol/L
mol/kg
mol
calculate the number of moles of Na+ ions in 25.g sodium carbonate,Na2CO3, molar mass: 106 g/mol
0.374
0.456
0.472
0.5
formula density?
volume/mass
mol/volume
mol/mass
mass/volume
Determine the molarity of NaCl solution which contains 0.050 mole of NaCl in 500 mL of water.
0.03mol/L
0.1mol/L
0.001 mol/L
none of these
write the balance equation:
NaOH + FeCl3 -> Fe(OH)3 + NaCl
(a)
what is limiting reactant?
is the reactant that is completely consumed in a reaction and limit the amount of product formed
is the reactant in quantities greater than necessary to react with the quantity of the limiting reactant
select the compound in which sulphur has the highest oxidation number.
SO2
SCl2
H2SO4
Na2SO4
What is the coefficient of Fe3O4 when the following equation is correctly balanced?
Al + Fe304 -> Al2O3 + Fe
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