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2 years ago

The properties of a compound are ____ the properties of the element that form it

Chemistry

1 answer:

Pie2 years ago

8 0

The properties of a compound are different than the properties of the element that forms it

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In which situation is chemical energy being converted to another form of energy? a lamp plugged into the electric grid a flutter

Irina18 [472]

OK so the answer to your question will be option D. because chemical energy is being transferred as heat and light

5 0

3 years ago

If we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chlori

erik [133]

Answer:

Theoretical yield of sodium chloride = 14.04 g

Explanation:

Given data:

Mass of sodium bromide = 25 g

Theoretical yield of sodium chloride = ?

Solution:

Chemical equation:

NaBr + KCl → NaCl + KBr

Number of moles sodium bromide:

Number of moles = Mass /molar mass

Number of moles = 25.0 g / 102.9 g/mol

Number of moles = 0.24 mol

Now we will compare the moles of NaCl with NaBr .

NaBr : NaCl

1 : 1

0.24 : 0.24

Theoretical yield of sodium chloride:

Mass = moles × molar mass

Mass = 0.24 mol × 58.5 g/mol

Mass = 14.04 g

7 0

3 years ago

The phophorus pentoxide used to produce phosphoric acid for cola soft drinks is prepared by nurning phosphorus in oxygen.

Radda [10]

Answer : The percent yield of $P_4O_{10}$ is, 87.7 %

Solution : Given,

Moles of $P_4$ = 0.200 mole

Moles of $O_2$ = 0.200 mole

Molar mass of $P_4O_{10}$ = 283.9 g/mole

First we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

$P_4+5O_2\rightarrow P_4O_{10}$

From the balanced reaction we conclude that

As, 5 mole of $O_2$ react with 1 mole of $P_4$

So, 0.200 moles of $O_2$ react with $\frac{0.200}{5}=0.04$ moles of $P_4$

From this we conclude that, $P_4$ is an excess reagent because the given moles are greater than the required moles and $O_2$ is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of $P_4O_{10}$

From the reaction, we conclude that

As, 5 mole of $O_2$ react to give 1 mole of $P_4O_{10}$

So, 0.200 moles of $O_2$ react to give $\frac{0.200}{5}=0.04$ moles of $P_4O_{10}$

Now we have to calculate the mass of $P_4O_{10}$

$\text{ Mass of }P_4O_{10}=\text{ Moles of }P_4O_{10}\times \text{ Molar mass of }P_4O_{10}$

$\text{ Mass of }P_4O_{10}=(0.04moles)\times (283.9g/mole)=11.4g$

Theoretical yield of $P_4O_{10}$ = 11.4 g

Experimental yield of $P_4O_{10}$ = 10.0 g

Now we have to calculate the percent yield of $P_4O_{10}$

$\% \text{ yield of }P_4O_{10}=\frac{\text{ Experimental yield of }P_4O_{10}}{\text{ Theretical yield of }P_4O_{10}}\times 100$

$\% \text{ yield of }P_4O_{10}=\frac{10.0g}{11.4g}\times 100=87.7\%$

Therefore, the percent yield of $P_4O_{10}$ is, 87.7 %

5 0

2 years ago

What is the name of this molecule?

Anuta_ua [19.1K]

The answer would be B Ethylamine

5 0

2 years ago

Read 2 more answers

PLEASE HELP!! 100 pts! There are both public and private crime labs in the United States. In your own words, explain the differe

kkurt [141]

Answer:

The forensic laboratory system in the United States consists of private and public labs. One well-known public lab is the FBI (the Federal Bureau of Investigation) Public labs are mostly run by police officers and state employees, while private labs are organized as a fee-for-service and they are small with a few large and medium=sized operations.

Explanation:

Idk and it's not even 100 points but I hope this helps.

5 0

3 years ago