3 years ago

The Invention of the Magnifying Glass allowed people to see that there were organisms living all over!

Chemistry

1 answer:

kenny6666 [7]3 years ago

3 0

Answer:

True

Explanation:

I don't have an explanation but I know that it is true.

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Which of the substances in the chemical equation is a pure substance?

Anni [7]

Answer:

D. all of these

Explanation:

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Hey....Tell me What is the molecular weight of carbon dioxide?? follow me....

Gnesinka [82]

Answer:

44 g/mol

Explanation:

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A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what woul

gayaneshka [121]

Answer:

10°C

Explanation:

Heat gain by water = Heat lost by the slice of pizza

Thus,

$m_{water}\times C_{water}\times \Delta T=Q$

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Volume = 50.0 L

Density of water= 1 kg/L

So, mass of the water:

$Mass\ of\ water=Density \times {Volume\ of\ water}$

$Mass\ of\ water=1 kg/L \times {50.0\ L}$

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Specific heat of water = 1 kcal/kg°C

ΔT = ?

For slice of pizza:

Q = 500 kcal

So,

$50\times 1\times \Delta T=500$

ΔT = 10°C

Increase in temperature = 10°C

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3 years ago

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san4es73 [151]

Answer:

dang

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knowing that the reaction of potassium in water is extremely exothermic, what would be the problem with adding a large piece of

anygoal [31]

Answer:

Explanation:

If the reaction is really exothermic (and it is) then the water would spatter all over the place. It would boil off if the container could hold it. It would also react according to the following reaction.

You are talking about a reaction like

2K + 2HOH = 2KOH + H2

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