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MatroZZZ [7]
3 years ago
11

A car is traveling 78.9 kilometers per hour. What is its speed in miles per minute? One ilometer = 0.62miles

Chemistry
2 answers:
Natalka [10]3 years ago
7 0

Answer:

0.82 miles per minute

Explanation:

(rounded to hundredths)

Anna71 [15]3 years ago
4 0
0.8171 per minute I think :)
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Can you help me balance the equations from 1-10 please and thank you.
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Calculate the volume of hydrogen if you have 12.1 moles of Hydrogen.
vodomira [7]

To Find :

The volume of 12.1 moles hydrogen at STP.

Solution :

We know at STP, 1 mole of gas any gas occupy a volume of 22.4 L.

Let, volume of 12.1 moles of hydrogen is x.

So, x = 22.4 × 12.1 L

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8 0
2 years ago
After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of
SIZIF [17.4K]

Answer:

b) The dehydrated sample absorbed moisture after heating

Explanation:

a) Strong initial heating caused some of the hydrate sample to splatter out.

This will result in a higher percent of water than the real one, because you assume in the calculation that the splattered sample was only water (which in not true).

b) The dehydrated sample absorbed moisture after heating.

Usually inorganic salts may absorbed moisture from the atmosphere so this will explain the 13% difference between calculated water percent the real content of water in the hydrate.

c) The amount of the hydrate sample used was too small.

It will create some errors but they do not create a difference of 13% difference as stated in the problem.

d) The crucible was not heated to constant mass before use.

Here the error is small.

e) Excess heating caused the dehydrated sample to decompose.

Usually the inorganic compounds are stable in the temperature range of this kind of experiments. If you have an organic compound which retain water molecules you may decompose the sample forming volatile compounds which will leave crucible so the error will be quite high.

6 0
3 years ago
A brand of dish soap says that it will get your dishes cleaner. What is the
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Answer:

B

Explanation:

Si no demuestra que funciona te estarían estafando

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2 years ago
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