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kari74 [83]
3 years ago
15

Calculate the molarity of the solution.

Chemistry
2 answers:
IRISSAK [1]3 years ago
8 0
<span>The formula given for it is 
moles = given wt/mol.Wt

 Mol.wt of  nacl
nacl=23+35.5
=58.5 gm
 Moles = 29/58.5
= 0.495
~ 0.15 moles </span>
IgorLugansk [536]3 years ago
7 0
Your answer should be B. 17
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Answer:chlorofluorocarbons (CFCs)

halon.

carbon tetrachloride (CCl4)

methyl chloroform (CH3CCl3)

hydrobromofluorocarbons (HBFCs)

hydrochlorofluorocarbons (HCFCs)

methyl bromide (CH3Br)

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Explanation:

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3 0
2 years ago
Suppose that you place exactly 100 bacteria into a flask containing nutrients for the bacteria and that you find the following d
tresset_1 [31]

Answer:

The order of the production of bacteria is 1.

12,787 bacteria will be present after 112 min.

0.04331 min^{-1} is the rate constant for the process.

Explanation:

Rate of formation of bacteria when there 100 bacteria: R

Rate of formation of bacteria when there 200 bacteria: R' =2R

Rate of formation of bacteria is directly proportional to the number of bacteria:

\frac{R}{R'}=\frac{k[200]^x}{k[400]^x}

\frac{R}{2R}=(\frac{200}{400})^x

x = 1

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The half life of the process = t_{1/2}=16 minutes

Rate constant of the process =  k

For first order process k is only dependent on half life:

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

k=\frac{0.693}{16 min}=0.04331 min^{-1}

For the first order process the increment numbers is given ;

N=N_o\times e^{kt}

Where:

N_o= Initial population

N = Population after time t.

We have ;

N_o=100

t = 112 minutes

N=100\times e^{0.04331 min^{-1}\times 112 min}

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12,787 bacteria will be present after 112 min.

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3 years ago
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The amount of sample that is left after a certain period of time, given the half-life, h, can be calculated through the equation.

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Answer:

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