When a chemical system is at equilibrium, which of the following statements about the equilibrium shown are always true?

a. the concentrations of the reactants are equal to the concentrations of the products

b. the concentrations of the reactants and products have reached constant values

c. the forward and reverse reactions have stopped

d. the reaction quotient, Q, has reached a minimum


Which of the following statements is true about chemical reactions?

A) It involves changing the ways the atoms are grouped.

You are watching: Which of the following statements is true about chemical reactions?

B) In a chemical reaction, atoms are neither created nor destroyed.

C) In a chemical reaction mass is conserved.

D) All of the above.

E) None of the above.


Which of the following statements about chemical equations is(are) true?

a. When balancing a chemical equation, you can never change the coefficient in front of any chemical formula.

b. The coefficients in a balanced chemical equation refer to the number of grams of reactants and products.

c. In a chemical equation, the reactants are on the right and the products are on the left.

d. When balancing a chemical equation, you can never change the subscripts of any chemical formula.

e. In chemical reactions, matter is neither created nor destroyed so a chemical equation must have the same number of atoms on both sides of the equation.

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