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Question 1 of 10
1. Question
1 point(s)The mass of an atom of element A is twice of the mass of an atom of carbon. Therefore its relative atomic mass is __________. [Relative Atomic Mass of Carbon = 12]
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Question 2 of 10
2. Question
1 point(s)
Which of the followings are true about the substance in the diagram?
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Question 3 of 10
3. Question
1 point(s)How many moles of magnesium that contain 2.408 x 10²³ of magnesium atom? [Avogadro number = 6.02 x 10²³]
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Question 4 of 10
4. Question
1 point(s)What is the relative molecular mass of Calcium Hydroxide (Ca(OH)₂)?
( Ar: O = 16, H = 1; Ca = 40 )- 1.
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Question 5 of 10
5. Question
1 point(s)Given that the formula of a compound is Na₂XO₄ and its relative molecular mass is 142. Find the relative atomic mass of element X?
(Relative Atomic Mass: O = 16; Na = 23 )- 1.
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Question 6 of 10
6. Question
1 point(s)The nucleon number of bromine is 80. What is the relative atomic mass of bromine?
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Question 7 of 10
7. Question
1 point(s)Find the number of atoms in 1.4 mol of copper metal.
[Avogadro constant = 6.02 x 10²³]- 1.
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Question 8 of 10
8. Question
1 point(s)One mole of substance is defined as the quantity of a substance that contains the same number of particles in 12.000g of _____________.
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Question 9 of 10
9. Question
1 point(s)The number of electrons of ion X2+ is 18. The number of neutrons of atom X is 20. The relative atomic mass of X is probably
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Question 10 of 10
10. Question
1 point(s)Which contains more atoms, 1 mol of helium or 1 mol of uranium?
[ RAM: He=4; U=238 ]- 1.
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