chapter 3.3 chemical formula

What is the chemical formula for iron(III) oxide?

• A Iron oxide

• B Iron trioxide

• C Iron(III) oxide

• D Iron dioxide

[Pahang JUJ Set 1 2023-18] The formula for nitrate salt M is MNO3. What is the formula for phosphate salt M?

• A MPO4

• B M2PO4

• C M3PO4

• D M2(PO4)3

0.40g of metal X reacts with fluorine to produce 0.78g of X fluoride. What is the empirical formula of the X fluoride?

• X F

• X2F

• XF4

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• A Silver ion

• B Silver ion

• C Aluminum ion

• D Aluminum ion

Among the pairs of IUPAC names with the chemical formula of compounds below, which one is correct?

• Magnesium nitrate (MgNO3)

• Calcium carbonate (CaCO3)

• Sodium chloride (NaCl)

• Aluminum sulfate (Al2(SO4)3)

Among the following, which one has the same empirical formula as ethene, C2H4?

• A C2H6

• B C3H8

• C C4H10

• D C6H12

[Johor Skudai2023-03] The chemical formula for copper oxide is

• A Copper(II) oxide

• B Copper dioxide

• C Copper(I) oxide

• D Copper peroxide

Among the following, which statement is correct about empirical formula?

• A formula that shows the simplest ratio of atoms for each element in a compound

• B formula that shows the actual number of atoms present in a molecule of a compound

• C formula that shows the molar ratio of each element in a compound

• D formula that shows the number of moles of each element in a compound

Among the following, which cation is correctly matched with its charge?

• A Zinc ion (+1)

• B Potassium ion (+2)

• C Aluminum ion (+1)

• D Magnesium ion (+2)

Which chemical formula is correctly named?

Formula kimia yang manakah dinamakan dengan betul ?

• A

• B

• C

• D