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WorksheetsChapter 1: Matter
Total questions: 10
Worksheet time: 50mins
How many electrons are there in 20080 Hg+?
79
80
81
119
Determine the number of protons, electrons and neutrons in 19779 Au atom.
79 protons, 118 neutrons and 79 electrons
79 protons, 118 neutrons and 118 electrons
79 protons, 197 neutrons and 79 electrons
118 protons, 79 neutrons and 79 electrons
Isotopes of an element are having
the similar nuclear charge
similar physical properties
the same number of neutrons
the same relative abundance
In a study, it is found that the copper abundance consists of a mixture of 69.09% 63Cu and 30.91% 65Cu. If the respective isotopic masses are 62.93 amu and 64.93 amu, what is the relative atomic mass of copper?
63.49
63.55
64.31
64.54
A sample of 3.25g compound, composing only titanium and chlorine, is completely reduced by sodium metal to form 0.82g titanium. Determine the empirical formula of that compound
TiCl
TiCl2
TiCl4
Ti2Cl
How many hydrogen atoms are there in 0.03 mol ammonium nitrate, NH4NO3?
1.21 x 1022
1.81 x 1022
3.61 x 1022
7.22 x 1022
How many H atoms are there in 55.2 g ammonium sulphite, (NH4)2SO3?
(R.A.M: H,1; N,14; S, 32; O, 16)
1.147 x 1023 H atoms
2.865 x 1023 H atoms
1.985 x 1023 H atoms
2.292 x 1023 H atoms
A student wish to neutralise phosphoric acid with 0.2 M solution of sodium hydroxide. The reaction equation is as follows:
H3PO4 + 3NaOH → Na3PO4 + 3H2O
What volume of 0.2M solution of sodium hydroxide is required to neutralise 50 mL phosphoric acid 0.1 M?
25 mL
50 mL
75 mL
150 mL
What is the molarity of Fe2+ solution prepared by dissolving 2.780 g of FeSO4.7H2O salt in distilled water and the final volume of the solution is 500 mL?
0.020 M
0.200 M
0.037 M
0.370 M
A sample of C12H22O11 contains 0.4662 mol of carbon. Calculate the number of mole of hydrogen atom in sample.
0.254 mol
0.855 mol
0.466 mol
0.932 mol
