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algol13
3 years ago
10

A car travels at a speed of 54 km/hr. How many meters will it travel in 1 second?

Chemistry
2 answers:
Lostsunrise [7]3 years ago
6 0

Answer: 15 METERS IN A SECOND

Explanation: 54km = 54000m    54000m / 60 = 900    900/60 = 15

makkiz [27]3 years ago
4 0
15 meters a second is the correct answer
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When 6.040 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 18.95 grams of CO2 and 7.759 grams of H
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Answer: The empirical formula is CH_2 and molecular formula is C_4H_8

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We are given:

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For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

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Step 1 : convert given masses into moles.

Moles of C =\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{5.07g}{12g/mole}=0.422moles

Moles of H=\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.862g}{1g/mole}=0.862moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =\frac{0.422}{0.422}=1

For H =\frac{0.862}{0.422}=2

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Now we have to calculate the molecular formula.

n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{56.1}{14}=4

The molecular formula will be=4\times CH_2=C_4H_8

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