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3 years ago

How many moles are in 4.35 X 1024 atoms of Iron (Fe)?

Chemistry

1 answer:

Naya [18.7K]3 years ago

3 0

Answer:

<h3>The answer is 7.23 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{4.35 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 7.225913...$

We have the final answer as

<h3>7.23 moles</h3>

Hope this helps you

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"the osmotic pressure exerted by a solution is equal to the molarity multiplied by the absolute temperature and the gas constant

ASHA 777 [7]

Answer: -

The concentration is 0.91 mol/ L

Explanation: -

The osmotic pressure = 23 atm

Absolute temperature = 309 K

Universal gas constant = 0.08206 L atm mol⁻¹ K⁻¹

We know the formula

Osmotic pressure = molar concentration x universal gas constant x absolute temperature

Plugging in the values

23 atm = molar concentration x 0.08206 L atm mol⁻¹ K⁻¹ x 309 K

Molar concentration = $\frac{23}{0.08206 x 309}$ mol/ L

= 0.91 mol / L

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nikitadnepr [17]

Answer:

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Explanation:

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Determine the point group change, if any, when GeCl4 is transformed into GeCl3F by a substitution process.

rjkz [21]

Answer:

The removal of one chlorine atom and addition of one fluorine atom.

Explanation:

When GeCl4 is transformed into GeCl3F by a substitution process, the main change that is occur in GeCl4 is the removal of one chlorine atom and addition of one fluorine atom. This process is known as substitution process in which two molecules exchange their atoms with each other when they comes in physically contact with each other.

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3 years ago

Why is Newton's first law of motion important to science?

Lyrx [107]

Answer:

Newton's laws are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don't float out of bed or fall through the floor of your house.

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3 years ago

Please help

KonstantinChe [14]

Answer: There are 0.5 grams of barium sulfate are present in 250 of 2.0 M $BaSO_{4}$ solution.

Explanation:

Given: Molarity of solution = 2.0 M

Volume of solution = 250 mL

Convert mL int L as follows.

$1 mL = 0.001 L\\250 mL = 250 mL \times \frac{0.001 L}{1 mL}\\= 0.25 L$

Molarity is the number of moles of solute present in liter of solution. Hence, molarity of the given $BaSO_{4}$ solution is as follows.

$Molarity = \frac{mass}{Volume (in L)}\\2.0 M = \frac{mass}{0.25 L}\\mass = 0.5 g$

Thus, we can conclude that there are 0.5 grams of barium sulfate are present in 250 of 2.0 M $BaSO_{4}$ solution.

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3 years ago