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ZanzabumX [31]
2 years ago
5

A collection of coins contains 14 pennies, 16 dimes, and 7 quarters. What is the percentage of pennies in the collection?A colle

ction of coins contains 14 pennies, 16 dimes, and 7 quarters. What is the percentage of pennies in the collection?
Chemistry
2 answers:
marin [14]2 years ago
8 0

Answer:

=37.83783784

Explanation:

Find the total sum of all coins,

which is 37, take the number of pennies and the total of all coins put in parenthesis( 14/37) like so and than * times them by 100

you equation should look like this

(14/37)* 100= and than the answer shown above should be the one you received. I have checked this with multiple calculators, it should be accurate.  

Nesterboy [21]2 years ago
7 0

Answer : The percentage of pennies in the collection is 37.84 %.

Explanation :

To calculate the percentage of pennies in the collection, we use the equation:

\text{Percentage of pennies}=\frac{\text{Coins of pennies}}{\text{Total number of coins}}\times 100

Given:

Number of coins of pennies = 14

Number of coins of dimes = 16

Number of coins of quarters = 7

Now we have to calculate the total number of coins.

Total number of coins = 14 + 16 + 7 = 37

Now we have to calculate the percentage of pennies in the collection.

\text{Percentage of pennies}=\frac{14}{37}\times 100=37.84\%

Hence, the percentage of pennies in the collection is 37.84 %.

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<span>Displaced volume :

</span>Final volume - <span>Initial volume

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D = 4.50 / 1.45

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The temperature at the boiling point remained constant despite the continued addition of heat by the bunsen burner. What was the
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Concept:

<em><u>Latent Heat of Vaporization</u></em>: It is defined as the amount of heat required to change the state of mater without changing of its temperature.

From the given question, the temperature at the boiling point remained constant despite the continued addition of heat by the Bunsen burner. <em>Actually,</em> this amount of heat is used by water to break the intermolecular bonds between the water molecules in the form of latent heat that converts the liquid state of water into vapor state of water.

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2 years ago
Eric said, “I took these photos from the same hill behind my house on three different nights. If half of the Moon is always illu
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Answer:

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Explanation:

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1 year ago
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The Mond process produces pure nickel metal via the thermal decomposition of nickel tetracarbonyl: Ni(CO)4 (l) → Ni (s) + 4CO (g
Yuki888 [10]

<u>Answer:</u> The volume of CO formed is 254.43 L.

<u>Explanation:</u>

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

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}  

Given mass of Ni(CO)_4 = 444 g

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Putting values in above equation, we get:

\text{Moles of }Ni(CO)_4=\frac{444g}{170.73g/mol}=2.60mol

For the given chemical reaction:

Ni(CO)_4(l)\rightarrow Ni(s)+4CO(g)

By stoichiometry of the reaction:

1 mole of nickel tetracarbonyl produces 4 moles of carbon monoxide.

So, 2.60 moles of nickel tetracarbonyl will produce = \frac{4}{1}\times 2.60=10.4mol of carbon monoxide.

Now, to calculate the volume of the gas, we use ideal gas equation, which is:

PV = nRT

where,

P = Pressure of the gas = 752 torr

V = Volume of the gas = ? L

n = Number of moles of gas = 10.4 mol

R = Gas constant = 62.364\text{ L Torr }mol^{-1}K^{-1}

T = Temperature of the gas = 22^oC=(273+22)K=295K

Putting values in above equation, we get:

752torr\times V=10.4mol\times 62.364\text{ L Torr }mol^{-1}K^{-1}\times 295K\\\\V=254.43L

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