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2 years ago

How many miles of NaCl are in 250 mL of a 0.4 M solution?

Chemistry

1 answer:

creativ13 [48]2 years ago

8 0

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution.

Explanation:

First, recognize that the molar concentration tells you how many moles of the solute are present in one liter of solution. In a 0.4 M solution, there are 0.4 moles of solute in every liter of solution. You can determine the number of moles of solute in 250 mL of the solution using dimensional analysis.

250 ml . 1L/1000 L . 0.4mol / 1L

Units of liters and milliliters cancel, leaving you with a final answer in units of moles, at 0.1 mol.

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kolbaska11 [484]

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3 years ago

A gas system has volume, moles and temperature of 9040 mL, 0.447 moles and -35.50 oC, respectively. What is the pressure in atm?

babymother [125]

Answer : The pressure of the gas is, 0.964 atm

Solution : Given,

Volume of gas = 9040 ml = 9.040 L (1 L = 1000 ml)

Moles of gas = 0.447 moles

Temperature of gas = $-35.50^oC=237.5K$ $(0^oC=273K)$

Using ideal gas equation,

$PV=nRT$

where,

P = pressure of the gas

V = volume of the gas

T = temperature of the gas

n = number of moles of gas

R = gas constant = $0.0821Latm/moleK$

Now put all the given values in this formula, we get the pressure of the gas.

$P(9.040L)=(0.447moles)\times (0.0821Latm/moleK)\times (237.5K)$

By rearranging the terms, we get

$P=0.964atm$

Therefore, the pressure of the gas is, 0.964 atm

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2 years ago

How many grams are in 23.6 molecules of water?

Akimi4 [234]

Answer:

7.06 g H2O

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2 years ago

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saw5 [17]

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3 years ago

How many miles of NaCl are in 250 mL of a 0.4 M solution?​

How many miles of NaCl are in 250 mL of a 0.4 M solution?