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zimovet [89]
3 years ago
15

A salt solution with a volume of 250 mL that contains 0.70 mol NaCl.

Chemistry
1 answer:
uysha [10]3 years ago
5 0
 <span>0.70 mol/0.250 L = 2.8 M</span>
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True or false: the most easily ionizable elements are the most electronegative.
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2 years ago
I typed a question. It said give points. I selected. Someone answered notification came. But where do I see they persons answer?
Ksivusya [100]

Answer:

212.304 grams

Explanation:

similar to your other question, use the same formula

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2 years ago
Determine the molar concentration of HCL required if 40cm^3 of HCL is reacted with 36g of magnesium via this equation.
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The answer is in the photo.

4 0
3 years ago
The half life of an isotope X is 3 days how long will it take for 1/2 of a 10 G sample to decay
lorasvet [3.4K]

Answer:  It will take 3 days for half of a 10 g sample to decay.

Explanation:

Half-life of sample of an isotope X = 3 days

\lambda=\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{3 days}=0.231 day^{-1}

N=N_o\times e^{-\lambda t}

\lnN=-\lambda t\lnN_o

Sample decayed = \frac{N_o}{2}=\frac{10 g}{2 g}=5 g

N=N^o-\text{sample decayed}=10 g-5 g=5 g, time = t

\ln[5 g]=-0.231 day^{-1}\times t\ln[10]

\ln[\frac{5}{10}]=-0.231\times t

\ln\frac{1}{2}=-0.693=-0.231\times t

t = 3 days

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3 0
2 years ago
According to the Brensted-Lowry model write the equation for provided acid showing
Taya2010 [7]

Answer:

i dont know sorry

Explanation:

3 0
2 years ago
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