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umka2103 [35]
3 years ago
11

Thea dissolves 0.33 mole of glucose into 450 mL of water. What is the concentration of the solution?

Chemistry
1 answer:
Fofino [41]3 years ago
4 0

Answer:

0.73M

Explanation:

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What do all four animals have in common? cat worm spider crab
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A fossil was analyzed and determined to have a carbon-14 level that is 70 % that of living organisms. The half-life of C-14 is 5
Citrus2011 [14]

Answer: 2948

Explanation:

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}

k=\frac{0.69}{t_{\frac{1}{2}}}=\frac{0.693}{5730}=1.21\times 10^{-4}years^{-1}

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  = 1.21\times 10^{-4}years^{-1}

t = age of sample  = ?

a = let initial amount of the reactant  = 100

a - x = amount left after decay process = \frac{70}{100}\times 100=70

t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{70}

t=2948years

Thus the fossil is 2948 years old.

5 0
3 years ago
Which term describes the following group of planets: Jupiter, Saturn, Uranus, and<br> Neptune?
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Answer:

Gas giants.

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A small positively charged ball is moved closer to a large, positively charged ball. which describes how the small ball likely r
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Explanation:

Hope this helps! If it did, please mark it as brainliest! It would help a lot! Thanks! :D

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