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charle [14.2K]
3 years ago
5

What is the percent mass of C8H10 when 123 g of C8H10 dissolved in 765 g of C6H6? Express your answer to three significant figur

es.
Chemistry
1 answer:
3241004551 [841]3 years ago
3 0

Answer:

13.8%

Explanation:

take the 123g and divide it by the total mass which is 123g + 765g

123/888 = .138

multiply by 100 for a percentage = 13.8%

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Also, to answer your question, it would be most likely different from both atoms, as size doesn't really matter in a compound's properties.
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What is the main purpose of using NaOH in the saponification reaction . NaOH works as the catalyst b. NaOH solution is the solve
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Explanation:

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5 0
3 years ago
Read 2 more answers
A radioactive element reduces to 5.00% of its initial mass in
Stolb23 [73]

The half-life in months of a radioactive element that reduce to 5.00% of its initial mass in 500.0 years is approximately 1389 months

To solve this question, we'll begin by calculating the number of half-lives that has elapsed. This can be obtained as follow:

Amount remaining (N) = 5%

Original amount (N₀) = 100%

<h3>Number of half-lives (n) =?</h3>

N₀ × 2ⁿ = N  

5 × 2ⁿ = 100

2ⁿ = 100/5

2ⁿ = 20

Take the log of both side

Log 2ⁿ = log 20

nlog 2 = log 20

Divide both side by log 2

n = log 20 / log 2

<h3>n = 4.32</h3>

Thus, 4.32 half-lives gas elapsed.

Finally, we shall determine the half-life of the element. This can be obtained as follow.

Number of half-lives (n) = 4.32

Time (t) = 500 years

<h3>Half-life (t½) =? </h3>

t½ = t / n

t½ = 500 / 4.32

t½ = 115.74 years

Multiply by 12 to express in months

t½ = 115.74 × 12

<h3>t½ ≈ 1389 months </h3>

Therefore, the half-life of the radioactive element in months is approximately 1389 months

Learn more: brainly.com/question/24868345

8 0
3 years ago
What is magnesium oxide (A) a molecular compound with properties different from magnesium or oxygen (B) a molecular compound wit
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Try out answer C magnesium oxides melting point is almost 5 times higher than magnesium
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