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2 years ago

What mass of CaCl2 would be needed in order to make 750.00mL of a 2.00m CaCl2 solution

Chemistry

2 answers:

Alexandra [31]2 years ago

5 0

Answer:

The molality of the substance (CaCl2) ( C a C l 2 ) is Molality=2.88 m Molality = 2.88 m.

Hope this helps✌

givi [52]2 years ago

4 0

Answer:

5.00 g calcium chloride in 95.0 g of water. Solute? ... (4 pts) Calculate the grams of copper (II) nitrate needed to make 100.0 mL of a 3.50 M solution

Explanation:

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What causes water to runoff

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Explanation:

Runoff occurs when there is more water than land can absorb so it would be C.

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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.

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3 years ago

Measure the initial temperature of the water to the

LuckyWell [14K]

Answer:

Answer:

100

22.4

27.1

Explanation:

Explanation:

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3 years ago

Given the following chemical reaction:

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Answer:

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2 years ago

How many molecules are in 8.2 moles of CO3

Anarel [89]

I believe the answer is 50.5 molecules

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3 years ago