2 years ago

Calculate the molarity when 28.91 grams of nacl is dissolved in 352 ml of water

1 answer:

7 0

Answer:

divide the number of moles of NaCl by the volume of the solution. In this case that is 0.32 moles, NaCl split by 3.4 L gives 0.094 M NaCl.

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The molar mass of Beryllium (Be)

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The molar mass of Beryllium is 9.012182 u (symbol I can't put down) 0.000003 U

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How do the test variables (independent variables) and outcome variables (dependent variables) in an experiment compare? A. The t

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3 years ago

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The activation energy for a(n) _____ is quite large and usually takes extra energy from the environment, it is normally not a na

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The activation energy for an endothermic reaction is quite large and usually takes extra energy from the environment, it is normally not a natural spontaneous process.

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A gas at a pressure of 360 torrs and a volume of 750 ml. If the pressure becomes 1.5 atm what is the new volume?

r-ruslan [8.4K]

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V₂ = 236.84 mL

Explanation:

The relation between pressure and volume is inverse.

We can write it as follows :

$P_1V_1=P_2V_2$

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P₁ = 360 torrs, V₁ = 750 mL, P₂ = 1.5 atm = 1140 torr.

So,

$V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{360\times 750}{1140}\\\\V_2=236.84\ mL$

So, the new volume of the gas is 236.84 mL.

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3 years ago

It is found that, when a dilute gas expands quasistatically from 0.40 to 5.0 L, it does 210 J of work. Assuming that the gas tem

fenix001 [56]

Answer:

$n=0.033mole$

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From the question we are told that:

Initial volume $V_1=0.40L$

Final Volume $V_2=5.0L$

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$W=nRTIn\frac{V_2}{V_1}$

$n=\frac{W}{RTIn\frac{V_2}{V_1}}$

$n=\frac{210}{8.32*300In\frac{5.0}{0.4}}$

$n=0.033mole$

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3 years ago