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AnnZ [28]
3 years ago
5

Which phrase describes a hypothesis? a. reviewing information related to the problem b. testing a factor, or variable, in an exp

eriment c. suggesting a solution to a problem after studying it carefully d. performing a controlled experiment
Chemistry
1 answer:
monitta3 years ago
4 0

Answer:

c. suggesting a solution to a problem after studying it carefully

Explanation:

Hypothesis generally refers to an assumption made. This assumption can either be true or false. It is a reasoning presented in order to explain a phenomenon and is the starting point for further investigation.

Among the options, the closest that best describes it is option C.

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C3H8 + O2 → CO2 + H2O
andreyandreev [35.5K]
First, we'll balance the equation
C3H8 + 5O2 --> 3CO2 + 4H2O
Next, we know that a gas at stp occupies 22.4 liters/mole, so we can find the number of moles of oxygen gas.
15 liters O2 * (1 mole O2)/(22.4 liters O2) = 0.67 moles O2
Now we know from our balanced equation that there are 3 moles of CO2 per mole of O2, so we can find the number of moles of CO2 we produce.
0.67 moles O2 * (3 moles CO2/5 moles O2) = 0.40 moles CO2
Now, we have the number of moles of CO2, and we know that one mole occupies 22.4 liters, we can find the number of liters
.40 moles CO2 * (22.4 liters CO2)/(1 mole CO2) = 9.0 liters of CO2
The answer is D
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4 years ago
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Artyom0805 [142]

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4 0
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Give an example of an oxidisation reaction!
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</span>
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