Unit 4: Chemical Reactions And Stoichiometry: Question Preview (ID: 19213)


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What type of reaction is AX = Z+ X?
a) synthesis b) decomposition c) single replacement d) double replacement
What type of reaction is AB+X = AX+B
a) synthesis b) decomposition c) single replacement d) double replacement
What's a correct balanced equation?
a) K + Cl = KCl2 b) 2H2O2 = H2 + O2 c) MgO = Mg + O2 d) 2H2 + O2 = 2H2O
How many grams are there in 2.5 mol of H2O?
a) 45 g b) .1388 g c) 75 g d) 1.38 g
What's the mol of 4.6g of MgCl2?
a) 4 mol b) 433.78 mol c) 94.3 mol d) .048 mol
What's the molar mass of H2SO4?
a) 64 g/mol b) 32 g/mol c) 66 g/mol d) 98 g/mol
what type of reaction is AC + BD = BC + AD?
a) synthesis b) decomposition c) single replacement d) double replacement
What's the % composition of H in H2O?
a) 16% b) 13% c) 11% d) 20%
What's the % composition of oxygen in H3PO4?
a) 65% b) 3% c) 32% d) 6.5%
What's the % composition of S in H2SO4?
a) 33% b) 36% c) 40% d) 65%
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