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shtirl [24]
3 years ago
15

2. If a person in a wheelchair wanted to get to the second story of a two-story building, would it be easier to

Chemistry
2 answers:
Gnoma [55]3 years ago
8 0

Answer: in my opinion, i would choose the long, shallow ramp because if you had a wheelchair you would be traveling at 100mph!

Explanation:

katen-ka-za [31]3 years ago
7 0

Answer:

The short steep ramp would be much harder because you will have to work more against gravity.

Explanation:

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A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula
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Answer:

Na₂CO₃•H₂O

Explanation:

After it is heated, the remaining mass is the mass of sodium carbonate.

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Convert masses to moles:

30.2 g Na₂CO₃ × (1 mol Na₂CO₃ / 106 g Na₂CO₃) = 0.285 mol Na₂CO₃

5.2 g H₂O × (1 mol H₂O / 18.0 g H₂O) = 0.289 mol H₂O

Normalize by dividing by the smallest:

0.285 / 0.285 = 1.00 mol Na₂CO₃

0.289 / 0.285 = 1.01 mol H₂O

The ratio is approximately 1:1.  So the formula of the hydrate is Na₂CO₃•H₂O.

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