Plz its a test.
1 ) which of the following is a chemical property.
a. ability to become magnetic
b. ability to conduct electricity
c. ability to conduct heat
d. ability to react with acid
2 ) you heat two substances, a and b. both substances change color. when cooled, substance b returns to its original color, but substance a does not. what most likely happened? .
a. physical change occurred in both substances
b. a physical change occurred in substance a, and a chemical change occured in substance b.
c. a chemical change occurred in substance a, and a physical change occurred in substance b.
d. a chemical change occurred in both substances
3 ) how many grams are in 2.5 pound sample? express your answer in scientific notation with three significant figures. ( 1 pound= 453.592 grams).
a. 2.26 • 10^2 g
b. 1.13 • 10^3 g
c. 2.3 • 10^3 g
d. 2.27 • 10^3g
you

The answer to your question is below

Explanation:

1 ) Which of the following is a chemical property.

A. Ability to become magnetic  this is wrong, it's a physical property

B. Ability to conduct electricity   this is wrong, it's a physical property

C. Ability to conduct heat   this is wrong, it's a physical property

D. Ability to react with acid This is the right answer

2 ) You heat two substances, A and B. Both substances change color. When cooled, substance B returns to its original color, but substance A does not. What most likely happened?.

A. Physical change occurred in both substances   This is wrong, a physial change only happens in substance B

B. A physical change occurred in substance A, and a chemical change occured in substance B.  This is wrong, a physical change occurred in substance B and a chemical change occurred in substance A.

C. A chemical change occurred in substance A, and a physical change occurred in substance B.  This is the right answer is exactly what happens

D. A chemical change occurred in both substances  This answer is wrong.

3 ) how many grams are in 2.5 pound sample? Express your answer in scientific notation with three significant figures. ( 1 pound= 453.592 grams).

Rule of three

    1 pound 453.592 g

  2.5 pounds   x

  x = 2.5(453.592)/1

  x = 1133.98 g = 1.13 x 10³ g    letter D

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

the product of the pressure and volume is also constant