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kobusy [5.1K]
3 years ago
5

11. If two substances react and the temperature of the mixture decreases, the reaction

Chemistry
1 answer:
Goshia [24]3 years ago
5 0

Answer:

a.endothermic reaction

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7nadin3 [17]
Difference in density between the two liquids
5 0
3 years ago
When 8.00x10^22 molecules of ammonia react with 7.00x10^22 molecules of oxygen according to the chemical equation shown below, h
Pavel [41]
NH₃:

N = 8*10²²
NA = 6.02*10²³

n = N/NA = 8*10²²/6.02*10²³ ≈ 1.33*10⁻¹=0.133mol

O₂:

N=7*10²²
NA = 6.02*10²³

n = N/NA = 7*10²²/6.02*10²³ = 1.16*10⁻¹=0.116mol

4NH₃                   <span>+                        3O</span>₂                      ⇒<span>          2N</span>₂<span> + 6H</span>₂<span>O
</span>4mol                     :                        3mol                   :             2mol
0.133mol             :                        0.116mol           :             0,0665mol
limiting reactant

N₂:

n = 0.0665mol
M = 28g/mol

m = n*M = 0.0665mol*28g/mol = <u>1,862g</u>
6 0
3 years ago
If a star is 33.11 trillion kilometers away how much light years would that be
abruzzese [7]
33.11 trillion kilometers is equivalent to 3.5 light years

hope this helps :)<span />
8 0
3 years ago
HELPPPPP!!!!
Margarita [4]

Answer:

sound waves travel.faster through materials that are more dense

8 0
3 years ago
Read 2 more answers
1 point
lawyer [7]

Answer:

B

Explanation:

you're moving the decimal 8 spots to the left so it can only be B

6 0
2 years ago
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