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2 years ago

2. If a machine produces 225 parts in an 8 hour day, how many minutes will it take to

Chemistry

1 answer:

vekshin12 years ago

4 0

21.28s

Explanation:

This is a rate problem.

Number of parts produced = 225

Time taken to produce= 8hours

Rate of production is the amount of parts produced in a duration of time.

Now convert 8 hours to minute;

60 minutes = 1hr

8 hours = 60 x 8 = 480minutes

Now:

Rate of production = $\frac{225 parts}{480min}$ = 0.47parts/minute

Now, to produce 10 parts;

It takes;

0.47 parts to be produced in 1 minute

10 parts would be produced in $\frac{10}{047}$ = 21.28s

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Answer:

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We know Absorbance and we can assume L = 1 cm, but being an unknown substance, we must know the molar Absorptivity of it, therefore, only having that value we could calculate the concentration of the mixture using the previous equation.

Then we could use the dilution ratio:

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2 years ago

A 2 L bottle containing only air is sealed at a temperature of 22°C and a pressure of 0.982 atm. The bottle is placed in a freez

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Answer:

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Magnesium has an atomic mass of 24.3. there are two isotopes of magnesium - one contains 12 neutrons and the other contains 13 n

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So what we know:
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Plugged in it looks like this:
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