Balancing Equations And Counting Atoms: Question Preview (ID: 28860)

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How many atoms are of Hydrogen are in the following chemical formula? 3Mg(OH)2
a) 1 b) 2 c) 5 d) 6
Which coefficient will balance the following equation? Zn + HCl --- ___ZnCl2 + H2
a) 2 b) 3 c) 4 d) None of the above
The substances produced in a chemical reaction are called ____________.
a) Reactants b) Products c) Mixtures d) Solutions
What does the arrow in a chemical equation mean?
a) yields b) equals c) mixes d) matches
Determine the number of Oxygen atoms in the following chemical formula: Pb(NO3)2
a) 1 b) 3 c) 5 d) 6
Which of the following equations is balanced?
a) H2 + O2 --- H2O b) 2H2 + O2 --- 2H2O c) H2 + 2O2 --- 2H2O d) 2H2 + O2 --- H2O
Which of the following describes the law of conservation?
a) Matter can be created or destroyed in certain chemical reactions. b) Products = Reactants c) Reactants + Products = 100% d) Matter cannot be created or destroyed, but it can change form.
A chemical equation is balanced when the number of each type of __________ is the same on both sides.
a) Formula b) Compound c) Atom d) Molecule
Which of the following can be changed to balance a chemical equation?
a) Coefficients b) Subscripts c) Element Symbols d) Products
Which of the following is the general form of a chemical equation?
a) Products = Reactants b) Products + Reactants = 100% c) Products yield reactants d) Reactants yield products
How many atoms of Oxygen are present in the following chemical formula: 2CO2
a) 1 b) 2 c) 4 d) 6
The substances that begin a chemical reaction are called _________.
a) Products b) Reactants c) Mixtures d) Ingredients
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