17. when oxygen is available, sulfur dioxide is produced from the burning of sulfur. which of the following…

17. when oxygen is available, sulfur dioxide is produced from the burning of sulfur. which of the following word equations best represents this reaction?\na. sulfur + oxygen -> sulfur dioxide\nc. sulfur dioxide -> sulfur + oxygen\nb. sulfur dioxide + oxygen -> sulfur\nd. sulfur -> sulfur dioxide + oxygen\n18. in a reaction, in which hydrogen reacts with oxygen to produce water, which substances are the reactants?\na. hydrogen only\nc. both hydrogen and oxygen\nb. oxygen only\nd. water\n19. a catalyst is _.\na. is a reactant\nc. the product of a reaction\nb. a solid product of a reaction\nd. a chemical that speed up the reaction

17. when oxygen is available, sulfur dioxide is produced from the burning of sulfur. which of the following word equations best represents this reaction?\na. sulfur + oxygen -> sulfur dioxide\nc. sulfur dioxide -> sulfur + oxygen\nb. sulfur dioxide + oxygen -> sulfur\nd. sulfur -> sulfur dioxide + oxygen\n18. in a reaction, in which hydrogen reacts with oxygen to produce water, which substances are the reactants?\na. hydrogen only\nc. both hydrogen and oxygen\nb. oxygen only\nd. water\n19. a catalyst is _.\na. is a reactant\nc. the product of a reaction\nb. a solid product of a reaction\nd. a chemical that speed up the reaction

Answer

Explanation:

Step1: Analyze question 17

In a chemical reaction where sulfur burns in oxygen to form sulfur - dioxide, sulfur and oxygen are reactants and sulfur - dioxide is the product. The correct word equation is sulfur + oxygen → sulfur dioxide.

Step2: Analyze question 18

In a chemical reaction, reactants are the substances that participate in the reaction. When hydrogen reacts with oxygen to produce water, hydrogen and oxygen are the reactants.

Step3: Analyze question 19

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the reaction.

Answer:

  1. a. sulfur + oxygen → sulfur dioxide
  2. c. both hydrogen and oxygen
  3. d. a chemical that speeds up the reaction