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 2.0g of hydrogen with 16.0g of oxygen? (1 point)
14.0g
16.0g
18.0g***
20.0g
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.
D
C
B
B
Yes 100% Correct
1. D
2. C
3. B
4. B
Pacman is 100% correct! Thank you!!
d
c
b
b is correct got 100%
I agree with your answers.
Yes, Skylar, even question 4.
You should not guess all the time. Even a quick google search can verify your answer.
Connexus students is 100%
1.D
2.C
3.B
4.B
Idk about khan academy
I only guessed on number 4 the rest I did on my own
1. D
2. C
3. B
4. B
They are all correct :)
THX
100%
wow i got 100% to thx guys
Yay! I got 100% thanks for checking with me herp_derp :D
ok good cause I kind of geussed
what about #4?
THANKYOU I was rely having trouble with number 3
I got 100/100 :) Thanks pacman
1. D
2. C
3. B
4. B
100%
I totally needed help thank you soooo much That girl doesn't wanna work cause she's behind xo and Pacman and Herp_Derp. BTW, I love Pacman!!! Thank you!!!!
Connexus Student 100%
Thankyou everybody
Thx I love this
Yes! Thank you! I got all of my questions right! Thank you so much for these answers:
1.D
2.C
3.B
4.B
Thanks a bunch, really helped!
1.D
2.C
3.B
4.B
still work DCBB 2020 100%
Got 100% THANKS
Thanks ^^
:D
Thanks~~
thanks
I just took the test (idk why im doing school at 5am on a Saturday) and got a 100
THX GUYS I GIT A 100% AND BOOSTED MY GRQDE UP FIR A C TO A. TYSM
Thanx pacman and everyone else! 100%
thank you
thanks :/
100%
Got 100%
my answers are straight from the test 100%
1. D splitting water into hydrogen and oxygen
2. C 18.0g
3. B they can be combined in many different ways
4. B mass is neither lost nor gained during a chemical change
With the amount of likes and dislike how many people here like sushi?
uhhh idk what I put here. ＼(ﾟｰﾟ＼)
why do people copy Skylar's answers no offence.
1. D
2. C
3. B
4. B
100% for Connexus