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1 year ago

You are asked to make 500 mL of a 0. 250 M sodium chloride (NaCl) solution.

Chemistry

1 answer:

nignag [31]1 year ago

3 0

Answer:

a. .125 mol b. 7.25g

Explanation:

a. To get the moles multiply the volume by the molarity.

.5L*.25M=.125mol NaCl

b. The molar mass is provided so multiply the moles by the molar mass to get the amount of grams of nacl.

.125mol*58molar mass=7.25g nacl to make the solution

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Which term best describes liquid behavior under pressure?

BartSMP [9]

The correct answer is incompressible. Liquids or fluids that behave under pressure are called incompressible fluids because they tend to behave through flowing movements. An example of an incompressible fluid is the lava which comes out of a volcano where once out of the atmosphere becomes dense and flows at a constant volume and velocity.

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3 years ago

At constant pressure, density of gas is inversely proportional to its temperature. This is how hot air balloon is floating in ai

Arturiano [62]

Answer:

1.08 g/L is the density of air.

Explanation:

Pressure of the gas = P (atm)

Volume of the gas = V (L)

Moles of gas = n = $\frac{w(g)}{M(g/mol)}$

Temperature of the gas = T (K)

$PV=nRt$

$PV=\frac{w}{M}\times RT$

$PM=\frac{w}{V}RT=DRT$

where:

D = density of the gas = $\frac{Mass}{Volume}$

R = universal gas constant

w = Mass of the gas

M =Molar mass of the gas

Given = P = 1.0 atm , T = 54°C = 327.15 K

Average molar mass of the gas = 29 g/mol

Putting all the given values in above equation.

$1 atm\times 29 g/mol=D\times 0.0821 atm L/mol K\times 327.15 K$

$D=\frac{1 atm\times 29 g/mol}{0.0821 atm L/mol K\times 327.15 K}$

D = 1.08 g/L

1.08 g/L is the density of air.

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3 years ago

A rock has a mass of 48 grams and a volume of 16 mL. What is the density of the rock?

Mrac [35]

Answer:

Divide mass by volume. you get 3

Explanation:

6 0

2 years ago

What kind of chemical reaction is shown? Mg + 2 HCl MgCl2 + H2

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Substitution
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3 years ago

18. How many grams are in 563 mL of chlorine gas at STP?

matrenka [14]

Answer:

$at \: stp : \\ 22400 \: ml \: are \: occupied \: by \: 71 \: g \: of \: chlorine \\ 563 \: ml \: will \: be \: occupied \: by \: ( \frac{563}{22400} \times 71) \:g \\ = 1.78 \: g$

8 0

3 years ago