Subsection 3.2. Relative masses of atoms and molecules for Chemistry, O Level - revisedeck

3.2. Relative masses of atoms and molecules

A subsection of Chemistry, 5070, through 3. Stoichiometry

Listing 10 of 70 questions

Three compounds are listed. copper(nitrate, Cu(NO3)2 zinc sulfate, ZnSO4 sodium thiosulfate, Na2S2O3 Which row shows the element that is present in the greatest percentage by mass in each compound?

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MCQ

2023

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Which row shows a pair of molecules where the Mr of compound X is exactly half that of compound Y?

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MCQ

2023

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Chrome alum is the common name for a salt which has the formula CrK(SO4)2. What is the percentage by mass of chromium in chrome alum?

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MCQ

2023

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The table gives some information about barium and chlorine. relative atomic mass group in Periodic Table barium II chlorine 35.5 VII Using this information only, a student makes three statements. There is more than one isotope of chlorine. There may be more than one isotope of barium. The relative formula mass of barium chloride is 208. Which statements are correct?

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MCQ

2024

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Which mass of carbon contains the same number of atoms as 16.0 g of sulfur?

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MCQ

2024

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Compound X contains carbon, hydrogen and oxygen only. It has an Mr of 90. 100 g of compound X contains 40.0 g of carbon and 6.7 g of hydrogen. How many oxygen atoms are there in each molecule of compound X?

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MCQ

2024

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A sample of element Q contains two isotopes. The diagram shows the relative abundances and relative masses of the two isotopes. relative mass relative abundance What is the relative atomic mass, Ar, of this sample of Q?

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MCQ

2024

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What is the relative molecular mass, Mr, of ethene?

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MCQ

2024

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What is the relative molecular mass, Mr, of N2O?

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2024

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Which contains the greatest mass of oxygen?

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MCQ

2024

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Questions Discovered

70