Chemical Formulas - 2nd Attempt

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Chemical Formula Quizzes & Trivia

This quiz is for those of you who would like a 2nd chance at improving your first chemical formula quiz. Remember, whatever score you receive here will override your first quiz score.

Questions and Answers
  • 1. 

    Write the chemical name for SCl6

    Explanation
    The correct answer is "sulfur hexachloride" because it follows the naming convention for binary compounds. The prefix "hexa-" indicates that there are six chlorine atoms bonded to one sulfur atom. Additionally, the element names are written in lowercase letters, except for the first letter of the element symbol (S).

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  • 2. 

    Write the chemical name for HgSO4

    Explanation
    The correct answer is "mercury (II) sulfate". This is the correct chemical name for HgSO4. The Roman numeral II indicates that the mercury ion has a charge of +2, while "sulfate" refers to the SO4 ion. Therefore, the correct chemical name for HgSO4 is mercury (II) sulfate.

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  • 3. 

    Write the chemical name for KCN

    Explanation
    The chemical name for KCN is potassium cyanide. KCN is a compound consisting of the elements potassium (K) and cyanide (CN). Cyanide is a highly toxic compound, and potassium cyanide is commonly used in various industries, such as mining and electroplating, as well as in chemical laboratories. The compound is known for its ability to release cyanide ions, which can interfere with the normal functioning of cells and inhibit essential enzymes, leading to severe health effects.

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  • 4. 

    Write the chemical name for Mg3N2

    Explanation
    The correct answer is magnesium nitride. Mg3N2 is the chemical formula for magnesium nitride. Magnesium nitride is an inorganic compound that is formed when magnesium reacts with nitrogen. It is a white solid and is often used as a source of nitrogen in various chemical reactions.

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  • 5. 

    Write the chemical name for HC2H3O2

    Explanation
    The chemical name for HC2H3O2 is acetic acid.

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  • 6. 

    Write the chemical name for TiO

    Explanation
    The correct answer is titanium (II) oxide, titanium(II) oxide, titanium(II)oxide. The chemical name for TiO is titanium (II) oxide. The Roman numeral (II) indicates that titanium has a +2 oxidation state in this compound. Therefore, the correct chemical name is titanium (II) oxide.

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  • 7. 

    Write the chemical name for Cl2O7

    Explanation
    The chemical name for Cl2O7 is dichlorine heptoxide.

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  • 8. 

    Write the chemical name for HIO4

    Explanation
    Periodic acid is the chemical name for HIO4. It is an inorganic compound that consists of iodine in its highest oxidation state (+7) and oxygen. The formula HIO4 represents a molecule of periodic acid, which is a strong oxidizing agent and is commonly used in organic synthesis and analytical chemistry.

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  • 9. 

    Write the chemical name for HNO3

    Explanation
    The chemical name for HNO3 is nitric acid.

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  • 10. 

    Write the chemical name for HF

    Explanation
    The chemical name for HF is hydrofluoric acid.

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  • 11. 

    Write the chemical formula for lead (II) carbonate

    Explanation
    Lead (II) carbonate is represented by the chemical formula PbCO3. In this compound, the lead ion has a charge of +2, indicated by the Roman numeral II in parentheses. The carbonate ion (CO3) has a charge of -2. To balance the charges, one lead ion combines with one carbonate ion, resulting in the formula PbCO3.

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  • 12. 

    Write the chemical formula for hypochlorous acid

    Explanation
    Hypochlorous acid is a weak acid that consists of one hydrogen atom, one chlorine atom, and one oxygen atom. Its chemical formula is HClO.

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  • 13. 

    Write the chemical formula for ammonium phosphate

    Explanation
    The chemical formula for ammonium phosphate is (NH4)3PO4. This formula represents a compound that contains three ammonium ions (NH4+) and one phosphate ion (PO4^3-). The brackets around the NH4 indicate that the ammonium ion is a polyatomic ion, consisting of one nitrogen atom bonded to four hydrogen atoms. The subscript 3 outside the brackets indicates that there are three ammonium ions present in the compound. The phosphate ion, represented by PO4^3-, consists of one phosphorus atom bonded to four oxygen atoms.

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  • 14. 

    Write the chemical formula for manganese dioxide

    Explanation
    The chemical formula for manganese dioxide is MnO2.

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  • 15. 

    Write the chemical formula for sodium iodide

    Explanation
    The chemical formula for sodium iodide is NaI. In this compound, sodium (Na) is bonded to iodine (I) through an ionic bond. Sodium is a metal with a +1 charge, while iodine is a non-metal with a -1 charge. Therefore, they combine in a 1:1 ratio to form sodium iodide. The formula NaI represents this composition.

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  • 16. 

    Write the chemical formula for tetrabromine nonoxide

    Explanation
    Tetrabromine nonoxide is a compound consisting of four bromine atoms and nine oxygen atoms. The chemical formula for tetrabromine nonoxide is Br4O9.

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  • 17. 

    Write the chemical formula for bromic acid

    Explanation
    Bromic acid is a chemical compound composed of hydrogen (H), bromine (Br), and oxygen (O). The chemical formula HBrO3 represents bromic acid, where the hydrogen atom is bonded to the bromine atom, and three oxygen atoms are also bonded to the bromine atom. This formula accurately represents the composition and structure of bromic acid.

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  • 18. 

    Write the chemical formula for iodine heptafluoride

    Explanation
    Iodine heptafluoride is represented by the chemical formula IF7. The symbol "I" represents iodine, and the subscript "F7" indicates that there are seven fluorine atoms bonded to the iodine atom. This formula accurately represents the composition and structure of iodine heptafluoride.

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  • 19. 

    Write the chemical formula for chromium (III) cyanide

    Explanation
    Chromium (III) cyanide is represented by the chemical formula Cr(CN)3. In this compound, the chromium ion has a +3 charge, indicated by the Roman numeral III in parentheses. The cyanide ion (CN-) has a -1 charge, so three cyanide ions are needed to balance the +3 charge of the chromium ion. Therefore, the correct chemical formula for chromium (III) cyanide is Cr(CN)3.

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  • 20. 

    Write the chemical formula for carbonic acid

    Explanation
    The chemical formula for carbonic acid is H2CO3. This formula represents the composition of carbonic acid, which consists of two hydrogen atoms (H2), one carbon atom (C), and three oxygen atoms (O3). Each hydrogen atom is bonded to the carbon atom, and the carbon atom is bonded to the three oxygen atoms. This formula accurately represents the structure and composition of carbonic acid.

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  • Current Version
  • Mar 16, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 07, 2010
    Quiz Created by
    Hope4flower

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