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sammy [17]
3 years ago
9

Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door

of the refrigerator is made of a nonmagnetic substance. What stage of scientific investigation does his guess represent?
A.
ask questions
B.
construct a hypothesis
C.
explain the results
D.
make observations
Chemistry
1 answer:
Nitella [24]3 years ago
5 0
The answer Is either C or D
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Chemical that can be mixed with another chemical to reduce the dangerous of a specific chemichal

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Q3. Why do you think there were so many heated debates about cell theory? Click or tap here to enter text.​
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Consider the following balanced equation for the following reaction:
Sidana [21]

<u>Answer:</u> The actual yield of the carbon dioxide is 47.48 grams

<u>Explanation:</u>

For the given balanced equation:

15O_2(g)+2C_6H_5COOH(aq.)\rightarrow 14CO_2(g)+6H_2O(l)

To calculate the mass for given number of moles, we use the equation:

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

Theoretical moles of carbon dioxide = 1.30 moles

Molar mass of carbon dioxide = 44 g/mol

Putting values in above equation, we get:

1.30mol=\frac{\text{Theoretical yield of carbon dioxide}}{44g/mol}\\\\\text{Theoretical yield of carbon dioxide}=(1.30mol\times 44g/mol)=57.2g

To calculate the theoretical yield of carbon dioxide, we use the equation:

\%\text{ yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100

Theoretical yield of carbon dioxide = 57.2 g

Percentage yield of carbon dioxide = 83.0 %

Putting values in above equation, we get:

83=\frac{\text{Actual yield of carbon dioxide}}{57.2}\times 100\\\\\text{Actual yield of carbon dioxide}=\frac{57.2\times 83}{100}=47.48g

Hence, the actual yield of the carbon dioxide is 47.48 grams

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4 years ago
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