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3 years ago

How to convert 3.612 x 10^23 atoms Fe

Chemistry

1 answer:

andrezito [222]3 years ago

8 0

Answer:

0.599800731 moles or 33.4988708 grams

Explanation:

You are given the number of atoms. To convert to moles, divide by the number of atoms in a mole:

(3.612*10^23 atoms)/(6.022*10^23 atoms per mole) = 0.599800731 moles

Then, multiply the number of moles by the molar mass of Fe (iron).

(0.599800731 moles)*(55.85 grams per mole) = 33.4988708 grams

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A gas with a volume of 250 mL at a temperature of 293K is heated to 324K. What is the new volume of the gas?

Natalija [7]

Answer:

The new volume of the gas is 276.45 mL.

Explanation:

Charles's law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Charles's law is a law that mathematically says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

$\frac{V}{T} =k$

Analyzing an initial state 1 and a final state 2, it is satisfied:

$\frac{V1}{T1} =\frac{V2}{T2}$

In this case:

V1= 250 mL
T1= 293 K
V2= ?
T2= 324 K

Replacing:

$\frac{250 mL}{293 K} =\frac{V2}{324 K}$

Solving:

$V2=324 K*\frac{250 mL}{293 K}$

V2= 276.45 mL

The new volume of the gas is 276.45 mL.

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3 years ago

If a substance cannot be separated physically it is?

MArishka [77]

Its an element Im pretty sure

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3 years ago

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Virty [35]

Explain whether this is a chemical or physical change, and why. does it involve elements, compounds, mixtures, or pure substances?

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Describe how many atoms are involved before and after. what do you notice about the number of atoms?

From the balanced chemical reaction, we see that we need 1 mol of N2 gas and 3 mol of H2 in order to form 2 mol of NH3.

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2 years ago

Billy the friendly Robot uses 50 N of force to lift a box 2 meters in the air. How much work did Billy perform?

nexus9112 [7]

Answer:

Work done, W = 100 J

Explanation:

We have, Billy the friendly Robot uses 50 N of force to lift a box 2 meters in the air.

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$W=Fd\\\\W=50\ N\times 2\ m\\\\W=100\ J$

So, the work performed by Billy is 100 J.

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