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Sveta_85 [38]
3 years ago
15

What is (+14)-(-9)=​

Chemistry
2 answers:
nasty-shy [4]3 years ago
3 0

Answer:

23

Explanation:

Simply remove the brackets and add 14 and 9

ser-zykov [4K]3 years ago
3 0

Answer:

23........................

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3 years ago
When 1 mol CS2(l) forms from its elements at 1 atm and 25°C, 89.7 kJ of heat is absorbed, and it takes 27.7 kJ to vaporize 1 mol
Kitty [74]

Answer:

There is 117.4 kJ of heat absorbed

Explanation:

<u>Step 1: </u>Data given

Number of moles CS2 = 1 mol

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Heat absorbed = 89.7 kJ

It takes 27.7 kJ to vaporize 1 mol of the liquid

<u>Step 2:</u> Calculate the heat that is absorbed

C(s) + 2S(s) → CS2(l)    ΔH = 89.7 kJ  (positive since heat is absorbed)

CS2(l) → CS2(g)           ΔH = 27.7 kJ  (positive since heat is absorbed)

We should balance the equations, before summing, but since they are already balanced, we don't have to change anything.

C(s) + 2S(s)---> CS2 (g)

ΔH = 89.7 + 27.7 = 117.4 kJ

There is 117.4 kJ of heat absorbed

6 0
3 years ago
What determines gravitational pull?
vlabodo [156]
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8 0
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What kind of data would you need to collect to carry out this experiment?
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Answer:

option C

Explanation:

hope it helps!!!!!!!!!

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