Question

The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate.

calcium + zinc carbonate → calcium carbonate + zinc

According to the law of conservation of matter, how much zinc is present in the product?
Group of answer choices

A. 98 grams

B. 74 grams

C. 88 grams

D. 64 grams


Question 7
MaryBeth and Grant are both pushing on a wagon, but in opposite directions. MaryBeth is pushing to the left with a force of 34 Newtons. Grant is pushing to the right with a force of 48 Newtons. What is the net force and which direction will the wagon move?
Group of answer choices

A. The wagon will move to the right. The net force is 14 Newtons.

B. The wagon will move to the right. The net force is 82 Newtons.

B. The wagon will move to the left since Grant is pushing harder. The net force is 14 Newtons.

D. The wagon will not move since MaryBeth and Grant are both pushing in opposite directions. The net force is 0.


Question 8
Which of the following quantities is a velocity?
Group of answer choices

A. 25 m/s

B. 3 g/L in weight

C. 15 m/s2

D. 10 km/hr eastward


Question 9
If you have 5 grams of product after a chemical reaction, how many grams of reactants did you have at the start of the reaction?
Group of answer choices

A. 5

B. 3

C. 2

D. 4


Question 10
Which state of matter has a defined shape?
Group of answer choices

A. liquids and gases

B. solids only

C. liquids only

D.solids and liquids


Question 11
To make a ball move faster, you need to increase:
Group of answer choices

A.The force applied to the ball

B. The size of the ball

C. The friction under the ball

D. The mass of the ball

Question 12
What is not a chemical property of an apple?
Group of answer choices

A. Apples are round and hard.

B. Apples can spoil or rot.

C. Apples can be digested.

D. Green apples can be more acidic than red apples.

Question 13
glass shattering in to pieces
bubblegum being stretched
a piece of metal expanding due to heat

These are all examples of
Group of answer choices

A. phase change.

B. chemical change.

C. temperature change.

D. physical change.

Answer 1

Answer:

216-152=64 gram (first question)

7. c (The wagon will move to the left since Grant is pushing harder. The net force is 14 Newtons.)

8. a

9. a

10.B

11. A

12. A

13.c