Question

1.Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point)
A. 20
B. 30***
C. 10
D. 15

2.Which procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?(1 point)
A. Find the mass of a stick of butter. Heat the butter until it melts. Find the mass of the melted butter.
B. Find the mass of a piece of paper. Tear the paper into smaller pieces. Find the mass of the pieces.***
C. Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
D. Find the mass of a log. Burn the log until it turns to ash. Find the mass of the ash.

3.What is always true according to the Law of Conservation of Matter?(1 point)
A. The total number of molecules before and after a chemical reaction stays the same.
B. Atoms created during a chemical reaction must have the same mass as the atoms in the reactants.***
C. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.
D. New molecules cannot be formed from the reactants during a chemical reaction.

4.A student combines two liquids in a beaker. She observes that the mass of the combined liquid is less than the mass of the two separate liquids. The student claims that this observation shows that matter is not conserved in chemical reactions. Which statement explains why the student’s claim is incorrect?(1 point)
A. The combined liquid was warmer than the two separate liquids.***
B. The product contained fewer atoms than the reactants.
C. The reaction produced a gas that escaped the beaker.
D. The reaction did not change the physical properties of the liquids.
HELP ASAP!!!!! PLEASE AND THANK YOU

Answer 1

Helppppp!!!!!!! Asap

Answer 2

ONLY THE FIRST ONES RIGHT

Answer 3

lol- do you have the rest of the answers?

Answer 4

1)D
2)B
3)A
4)B

Answer 5

ANon is wrong

Answer 6

first one is 30

Answer 7

plz post aswers not the number/letter they mix it up

Answer 8

helppppppppppppppppppppppppppp

Answer 9

1. 30
2. find the mass of an acid and a base
3. atoms can be rearranged during a chemical reaction but cannot be added or taken away
4. the reaction produces a gas that escaped the beaker

i got a 100

Answer 10

cool is right

Answer 11

I used cools answers and got a 100%

Answer 12

thanks cool

Answer 13

Thx @Cool, I got 100% with your answers

Answer 14

Thx @cool!

Answer 15

cool is right

Answer 16

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Answer 17

cool is right

Answer 18

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Answer 19

Cool right

Answer 20

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Answer 21

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Answer 22

@Rainbow Thats yet to happen to me 😔

Answer 23

ONLY THE FIRST ONE WAS RIGHT...........

Answer 24

cool is correct!! thank youu <33

Answer 25

your amazing

Answer 26

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Answer 27

And tysm @cool!!

Answer 28

hello, for connexus students the answer would be
D
B
A
D

@COOL would be right if you are a normal students.
best of luck to you all

Answer 29

thats different sis

Answer 30

u gotta put the answer not the letters

Answer 31

Thanks Cool!!! 100% and my grade keeps going up!

Answer 32

It's nice to come back a year later and see how appreciated i am!

Answer 33

hIGH

Answer 34

the sad thing is, some day if this website doesn't shut down, we could be in our 20's and kids are still using our answers, sad to think how time goes by so quick

Answer 35

YO DONT LISTEN TO HI HOMIES, ITS ACTUALLY
1. A
2. B
3. D
4. A

Answer 36

For the CA is wrong

1. 30
2. find the mass of a log. Burn the log until it turns to ash and smoke. Find the mass of the ash.
3. Zn + 2HCl → H2 + ZnCl2
4. The total number of atoms does not change, so mass is conserved in the reaction.

Answer 37

its actually "Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt." but ok

Answer 38

1000000 PERCENT RIGHT FOR CA THANK UUU

Answer 39

Nebula, our kids are gonna see these petty arguments and be weirded out.

Answer 40

ty cool 100%

Answer 41

1. 30
2. Find the mass or on acid and a base coming in hem to produce water…
Man I don’t usually do these but I give up these answers are right tho don’t listen to your mom I got a 50

Answer 42

1) 30
2)Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
3)Zn + 2HCl → H2 + ZnCl2
4)The total number of atoms does not change, so mass is conserved in the reaction.

Answer 43

1. 30
2. Find the mass of an acid and a base. Combine them to produce water and salt. Find the mass of water and salt.
3. Zn+2HCL= H2 + ZnCl2
4. The total numbers of atoms does not change, so mass is conserved in the reaction.

I took the test and got 100%! All of these answers are correct!!!!

Answer 44

Thank you @NEW ANSWERS 100% right!!!!!

Answer 45

I need help On a USA Test Prep LLC
It has 25 questions and is science

Answer 46

i need help on the unite 3 lesson 11 in sience 7th grade

Answer 47

Am i the only one who got
30
Find the mass of an acid.....
Atoms can be recharged....
the reaction produced the gas....

as the correct answers? Hope that helps for people who got my questions and i promise its 100% if they are the answers on your quick checks

Answer 48

So you do not have to scroll back up here are the 100% answers.


1. 30
2. find the mass of an acid and a base
3. atoms can be rearranged during a chemical reaction but cannot be added or taken away
4. the reaction produces a gas that escaped the beaker

i got a 100

cool
Oct 8, 2020

Use these answers he has 223 👍🏻 and 4 👎🏻. There is a 00.0000000000000000000000000000001% chance you will get it wrong using these answers. Creds to "cool".

Answer 49

1. 30
2. find the mass of an acid and a base
3. atoms can be rearranged during a chemical reaction but cannot be added or taken away
4. the reaction produces a gas that escaped the beaker
Trust me I got 100% good luck lovely’s ✌️

Answer 50

@cool is right tysm

Answer 51

Thanks COOL your the best

Answer 52

@Rainbow congrats! :) and thx cool you are correct!

Answer 53

Idk why I said thx I didn’t even take the quiz lol

Answer 54

guys cool is correct, use their answer NOW

Answer 55

1. 30
2. Find the mass of an acid and a base. Combine them to produce water and a salt. Find the mass of the water and salt.
3. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.
4. The reaction produced a gas that escaped the beaker.

Answer 56

Guys @Cool is 100% Right! I got a 100% on my quick check Also I was Sneezing NON STOP and I thought to myself " Am I allergic to School?"
Butt @Cool is right so yeah! Thanks Cool U DA BEST

Answer 57

thanks cool your the best!!!!!!!!!!!!!!!!!!!!!!!

Answer 58

Cool is correct, I got 100% read the answers on the test, and in his/her post, and make sure they match, and thou shall pass

Answer 59

tnx you guys so much

Answer 60

cool is cool

Answer 61

cool is still 100 percent correct

Answer 62

Big thanks to cool! His/Her/Their answers are 100% :)


Also, if you wanna help a homie out, you should go check out my YT- The channel name is my name on here, I'd love to have you as a subscroober 😋😋😋

Answer 63

Cool is right

Answer 64

Cool is 100 %, do we all go to connexus for eighth grade

Answer 65

cool is spiting straight facts

Answer 66

TYTYTYYYYY COOL!! BIG HELP!! <3

Answer 67

@cool is still correct March 2020.

Answer 68

cool is right

Answer 69

As an AI language model, I cannot verify if "cool" is correct unless I know the specific questions and answers being referred to. However, based on the positive feedback and multiple confirmations from users, it seems likely that their answers are correct.

Answer 70

COOLis the goat

Answer 71

🤑🤑🤑

Answer 72

o

Answer 73

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Answer 74

thanks cool, still right as of 2023

Answer 75

"cool" is correct 4/4 100% ez A+

Answer 76

COOL THANKS GOT A 100