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2 years ago

Help please !!!!!!!!!

Chemistry

1 answer:

Sveta_85 [38]2 years ago

6 0

4 Al(s) + 3 O2(g) ---> 2 Al2O3(s)

Use dimensional analysis and equation coefficients to convert moles of Al2O3 to moles of O2, to grams of O2:

[(1.00 mol Al2O3)/1][(3 mol O2)/(2 mol Al2O3)][(31.998 g O2)/(1 mol O2)] =

48.0 g of O2

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Answer:

PBr3 - Molecule , Polar

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2 years ago

A car travels at a speed of 80 km/h. Which of the following is correct to convert the speed of the car to hm/s? [1 km = 10 hm, 1

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Answer: The correct answer is Option D.

Explanation:

We are given that car travels with a speed of 80 km/hr and we need to convert it into hm/s.

For that we use the conversions:

1 kilometer = 10 hectometer

And, 1 hour = 3600 seconds

To convert the quantity into hm/s, we multiply the numerator which is 80 by 10 to convert the whole quantity into hm/hr and now, to convert the result into hm/s finally, we divide the result by 3600.

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Hence, the correct answer is option D.

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