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3 years ago

The volume of a sample of nitrogen is 6.00 liters at 35oC and 0.75 atm. What volume will it occupy at STP?

1 answer:

3 0

The volume that will occupy at STP is calculated as follows
by use of ideal gas equation
that is PV=nRT where n is number of moles calculate number of moles

n= PV/RT
p=0.75 atm
V=6.0 L
R = 0.0821 L.atm/k.mol
T= 35 +273= 308k
n=?

n= (o.75 atm x 6.0 L)/( 0.0821 L.atm/k.mol x 308 k)= 0.178 moles

Agt STP 1 mole= 22.4 L what obout 0.178 moles

= 22.4 x0.178moles/ 1moles =3.98 L( answer C)

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Lead has a density of 11.3 g/cm3 . what is the volume of a 15.1 g block of lead?

natita [175]

Hey there:

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mass = 15,1 g

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V = 15.1 / 11.3

V = 1.336 cm³

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3 years ago

What is (3.2x10^14) x (7.3x10^10)

Molodets [167]

So first, you would take 10 and raise it up to the 14th power. Then take 10, and raise it up to 10th power. After doing all the work, your answer should be 2.336E29.

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4 years ago

What is the mass, in grams, of 1.50 mol of iron (III) sulfate? Express your answer using three significant figures. mm = nothing

Paul [167]

Answer:

For A: The mass of iron (III) sulfate is 600. g

For B: The moles of ammonium carbonate is 0.07216 moles

For C: The mass of given number of molecules of aspirin is 0.359 grams.

For D: The molar mass of diazepam is 284.7 g/mol

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For A:

We are given:

Number of moles of iron (III) sulfate = 1.50 mol

Molar mass of iron (III) sulfate = 399.9 g/mol

Putting values in equation 1, we get:

$1.50mol=\frac{\text{Mass of iron (III) sulfate}}{399.9g/mol}\\\\\text{Mass of iron (III) sulfate}=(1.50mol\times 399.9g/mol)=600.g$

Hence, the mass of iron (III) sulfate is 600. g

For B:

We are given:

Mass of ammonium carbonate = 6.935 g

Molar mass of ammonium carbonate = 96.1 g/mol

Putting values in equation 1, we get:

$\text{Moles of ammonium carbonate}=\frac{6.935g}{96.1g/mol}=0.07216mol$

Hence, the moles of ammonium carbonate is 0.07216 moles

For C:

We are given:

Number of aspirin molecules = $1.20\times 10^{21}$

Mass of 1 mole of aspirin = 180.16 g/mol

According to mole concept:

$6.022\times 10^{23}$ number of molecules occupies 1 mole

So, $6.022\times 10^{23}$ number of molecules of aspirin has a mass of 180.16 grams

Thus, $1.20\times 10^{21}$ number of molecules of aspirin will have a mass of $\frac{180.16g}{6.022\times 10^{23}}\times 1.20\times 10^{21}=0.359g$

Hence, the mass of given number of molecules of aspirin is 0.359 grams.

For D:

We are given:

Moles of diazepam = 0.05570 mol

Given mass of diazepam = 15.86 g

Putting values in equation 1, we get:

$0.05570mol=\frac{15.86g}{\text{Molar mass of diazepam}}\\\\\text{Molar mass of diazepam}=\frac{15.86g}{0.05570mol}=284.7g/mol$

Hence, the molar mass of diazepam is 284.7 g/mol

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3 years ago

How does soil form from bare rock

Masteriza [31]

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3 0

3 years ago

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What is the mass of 7.2 moles of titanium to the nearest tenth?

Thepotemich [5.8K]

Answer:

7.2 moles of titanium weigh 344.7 grams.

Explanation:

Molar mass of titanium = 47.88 g

$1 \: mole \: of \: titanium = 47.88 \: grams \\ 7.2 \: moles \: of \: titanium = g$

solve for g

$g = ( \frac{7.2 \times 47.88}{1} ) \\ g = 344.7 \: grams$

8 0

3 years ago

Read 2 more answers