Question

Multiple Choice
1. Which of the following is a chemical change? (1 point)
boiling of water
melting a cube of ice
dissolving 10 grams of salt in water
splitting water into hydrogen and oxygen *

2. What is the mass of water that results from combining 2.0 g of hydrogen with 16.0 g of oxygen? (1 point)
14.0 g *
16.0 g
18.0 g
20.0 g

3. Why are plastic building blocks good for modeling molecules? (1 point)
They come in thousands of shapes and sizes.
They can be combined in many* different ways.
They are rigid and do not easily separate.
There are as many different colors as there are atoms.

4. What did Antoine Lavoisier’s experiments demonstrate? (1 point)
Atoms always split into pairs during a chemical change.
Mass is neither lost nor gained during a chemical change.
Matter can be created during a * chemical change.
Energy is neither lost nor gained during a chemical change.

Answer 1

Plz can someone check this?

Answer 2

I agree with 1 and 3 but not 2 and 4.

Answer 3

The answer to number 2 was the third and the answer to number 4 was the 2nd

Answer 4

D
C
B
B

Answer 5

junior thx i got a 100 TRUST JUNIOR IF U ARE IN CONNEXUS ACADEMY😃😃👌

Answer 6

i didnt rly trust em but hes right 100%