Balancing Equations and Types of Reactions

Front

Two reactants and one product

Back

synthesis

Front

One reactant into two or more products

Back

decomposition

Front

One element replaces another in a compound.

Back

single replacement

Front

Which of the following shows the balanced chemical equation for the reaction of potassium (K) with magnesium bromide (MgBr2) to form potassium bromide (KBr) and magnesium (Mg)? Options: 2K + MgBr  >  2KBr + Mg, 2K + MgBr₂ >  2KBr + Mg, K + MgBr₂  > KBr + Mg, K + MgBr₂  > KBr₂ + Mg.

Back

2K + MgBr₂ >  2KBr + Mg.

Front

Does the chemical reaction shown obey the law of conservation of mass? PbCl₂   Pb  + Cl₂

Back

Yes, because the equation is balanced.

Front

What type of reaction equation is represented by the formula below? AB + CD → AC + BD

Back

double replacement

Front

What type of reaction equation is represented by the formula below? A + B → AB

Back

synthesis

Front

What type of reaction equation is represented by the formula below? AB → A + B

Back

decomposition

Front

What type of reaction equation is represented by the formula below? AB + C → AC + B

Back

single replacement

Front

According to the law of conservation of matter, which statement about chemical reactions is true? Options: Atoms are created by some reactions and destroyed by others., Energy is created as atoms are destroyed in chemical reactions., Every atom destroyed in a chemical reaction must be replaced., Atoms cannot be created or destroyed by chemical reactions.

Back

Atoms cannot be created or destroyed by chemical reactions.