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CHEM0303010
Given that the molar mass of methane (CH4) is 16g/mol, hence 8g methane contains
CHEM0303020
Find the number of mole of atoms in 6g of carbon. [Relative atomic mass: C: 12]
CHEM0303030
Find the number of mole of molecules in 78g of ethanoic acid(CH₃COOH).
[Relative atomic mass: C = 12; H = 1; O = 16]
CHEM0303040
Which of the following substances has most number of particles?
[Relative Atomic Mass: Sodium = 23; Chlorine = 35.5; bromine = 80; Hydrogen = 1; Oxygen = 16]
CHEM0303050
Find the mass of 7.12 mol sodium iodide (NaI).
[Relative atomic mass: Na = 23; I = 127]
CHEM0303060
How many particles are there in 36.8g of sodium?
[ Relative atomic mass: Na =23; Avogadro Number = 6.02 x 10²³]
CHEM0303070
Find the mass of bromine that contains 1.806 x 10²³ of bromine molecule.
[Relative atomic mass: Br = 80; Avogadro constant = 6.02 x 10²³]
CHEM0303080
11.2g of iron contains 1.204 x 10²³ atoms. What is the molar mass of iron? [Avogadro constant = 6.02 x 10²³]