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)

Question

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

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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

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Answer 11

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Answer 12

thanks cool

Answer 13

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Answer 14

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Answer 15

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Answer 16

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Answer 17

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Answer 18

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Answer 19

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Answer 20

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Answer 21

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Answer 22

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Answer 23

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

Answer 24

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Answer 25

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Answer 26

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Answer 27

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Answer 28

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D
B
A
D

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

Answer 29

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Answer 30

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Answer 31

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Answer 32

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Answer 33

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Answer 34

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Answer 35

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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

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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

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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

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Answer 52

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Answer 53

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

Answer 54

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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

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Answer 57

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Answer 58

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Answer 59

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Answer 60

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Answer 61

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Answer 62

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Answer 63

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Answer 64

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Answer 65

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Answer 66

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Answer 67

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Answer 68

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Answer 69

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Answer 70

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Answer 71

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Answer 72

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Answer 73

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Answer 74

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Answer 75

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Answer 76

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