Question

I give medal who answers fast
Chemical reactions _____. (1 point)
occur only in living organisms
create and destroy atoms
only occur outside living organisms
produce new substances
2. What does the symbolin a chemical equation mean? (1 point)
Heat is supplied to the reaction.
A catalyst is needed.
yields
precipitate
3. A skeleton equation does NOT show which of the following? (1 point)
the correct formulas of the reactants and products
the reactants on the left, the products on the right
an arrow connecting the reactants to the products
the relative amounts of reactant

Answer 1

I hope I'm not too late :)

1. Well the first is obviously wrong. The second is very untrue, atoms are never destroyed. The third is also obviously wrong. So it must be the fourth? Not a very good question.

2. Which symbol???

3. A skeleton equation isn't balanced, so it doesn't show the relative amounts.

Answer 2

I took this quiz and I got them right:)
Chemical reactions _____. (1 point)

(0 pts) occur only in living organisms
(0 pts) create and destroy atoms
(0 pts) only occur outside living organisms
(1 pt) produce new substances

1 /1 point
2.
What does the symbolchemical changein a chemical equation mean? (1 point)

(1 pt) Heat is supplied to the reaction.
(0 pts) A catalyst is needed.
(0 pts) yields
(0 pts) precipitate

1 /1 point
3.
A skeleton equation does NOT show which of the following? (1 point)

(0 pts) the correct formulas of the reactants and products
(0 pts) the reactants on the left, the products on the right
(0 pts) an arrow connecting the reactants to the products
(1 pt) the relative amounts of reactants and products
So the answers are
1. D
2. A
3. D