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Deffense [45]
3 years ago
10

Fghgfgfgfftftftft ttcc

Chemistry
2 answers:
Olin [163]3 years ago
7 0

Answer:

fghgfgfgftftftftftft ttcc

tehee

Explanation:

Ganezh [65]3 years ago
4 0

Answer:

ybbbbgbg

Explanation:

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liq [111]

the compound is B.

Water is a compound because it is made up of water molecules.

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Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everything from fats and waxes to air
Yanka [14]

Answer: a. 79.6 s

b. 44.3 s

c. 191 s

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

t_{\frac{1}{2}}=\frac{0.693}{8.7\times 10^{-3}s^{-1}}=79.6s

b) for completion of 32% of reaction  

t=\frac{2.303}{k}\log\frac{100}{100-32}

t=\frac{2.303}{8.7\times 10^{-3}}\log\frac{100}{68}

t=44.3s

c) for completion of 81 % of reaction  

t=\frac{2.303}{k}\log\frac{100}{100-81}

t=\frac{2.303}{8.7\times 10^{-3}}\log\frac{100}{19}

t=191s

4 0
3 years ago
An element in group 7 on the periodic table most likely has which physical property?
larisa86 [58]

Answer:

They are most likely solid

Explanation:

solid is a physical property

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What is true of a scientific law?
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Answer: d

Explanation:

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URGENT! 15 POINTS, WILL MARK BRAINLIEST
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Answer:

Explanation:

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(you can plot this by using the (x,y) coordinates for each pair above.)

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mass is 2.2 times larger than the volume.

C. The mass is 2.2 times the volume.

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