1.4 Counting Atoms Quiz

Chemistry

NGSS

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| By Mamanakis2003

Mamanakis2003

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Quizzes Created: 2 | Total Attempts: 3,529

| Attempts: 843 | Questions: 5 | Updated: Mar 21, 2025

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1. Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 Count the atoms on the reactant side of the quiz H=

The given chemical equation represents a reaction between Ca3(PO4)2 and H2SO4, resulting in the formation of CaSO4 and H3PO4. In the reactant side of the equation, there are 2 hydrogen atoms present in the H2SO4 molecule. Therefore, the correct answer is 2.

Explanation

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About This Quiz

The '1.4 counting atoms quiz' assesses learners on counting atoms in a chemical reaction formula. It focuses on understanding the composition of reactants in a balanced equation, enhancing skills in stoichiometry and chemical notation.

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2. Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 Count the atoms on the reactant side of the quiz S=

The reactant side of the equation contains 1 sulfur atom (S).

Explanation

The reactant side of the equation contains 1 sulfur atom (S).

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3. Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 Count the atoms on the reactant side of the quiz P=

The equation shows the reaction between Ca3(PO4)2 and H2SO4 to form CaSO4 and H3PO4. To count the number of atoms of P on the reactant side, we look at the formula for Ca3(PO4)2 which contains 2 atoms of P. Therefore, the correct answer is 2.

Explanation

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4. Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 Count the atoms on the reactant side of the quiz Ca =

The correct answer is 3. In the reactant side of the equation, there is one calcium atom (Ca).

Explanation

The correct answer is 3. In the reactant side of the equation, there is one calcium atom (Ca).

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5. Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 Count the atoms on the reactant side of the quiz O=

The given chemical equation represents a reaction between calcium phosphate (Ca3(PO4)2) and sulfuric acid (H2SO4), which produces calcium sulfate (CaSO4) and phosphoric acid (H3PO4). To count the number of oxygen atoms on the reactant side, we need to consider the subscripts in the formula. In Ca3(PO4)2, there are 8 oxygen atoms (4 from PO4 and 4 from the subscript 2). In H2SO4, there are 4 oxygen atoms (from the subscript 4). Therefore, the total number of oxygen atoms on the reactant side is 12.

Explanation

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Ca3(PO4)2 + H2SO4----> CaSO4 + H3PO4 ...