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forsale [732]
2 years ago
12

If the molar mass of the compound in problem 3 is 73.8 grams/mole? what is the molecular formula ?

Chemistry
1 answer:
umka21 [38]2 years ago
7 0
The molecular formula would be Li2CO3
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A mixture is made of 40 ml of salt water to 200 ml of solution. What percent of the solution is salt water?
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Answer:

16.7%

Explanation:

40 ml of salt water + 200 ml of solution = 240 ml

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5 0
2 years ago
A pan containing 40 grams of water was allowed to cool from a temperature of 91.0C. If the amount of heat repressed is 1,300 jou
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Answer:

83°C

Explanation:

The following were obtained from the question:

M = 40g

C = 4.2J/g°C

T1 = 91°C

T2 =?

Q = 1300J

Q = MCΔT

ΔT = Q/CM

ΔT = 1300/(4.2x40)

ΔT = 8°C

But ΔT = T1 — T2 (since the reaction involves cooling)

ΔT = T1 — T2

8 = 91 — T2

Collect like terms

8 — 91 = —T2

— 83 = —T2

Multiply through by —1

T2 = 83°C

The final temperature is 83°C

3 0
3 years ago
Which term describes the composition of matter shown in Figure E?
elena-14-01-66 [18.8K]

Answer:

Figure E is a compound

Explanation:

Compounds are constructed of 2 different elements

5 0
2 years ago
The decomposition of mercury (ii) oxide at high temperature, is it an endothermic or exothermic process? Write a chemical reacti
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hope it helped u buddy

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2 years ago
Read 2 more answers
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