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natulia [17]
4 years ago
6

What type of energy transfer is responsible for making you feel cold when you are swimming in cool water? Explain your answer

Chemistry
1 answer:
antiseptic1488 [7]4 years ago
6 0
The energy they are reffering to is heat . When you swim in cold water the heat of your body is transffered to the water becasue i guess it s because it wants to reach and enqilibrium within the systems.Nature in general doesn t like gradients.And also in water we loose more heat compared to air of the same temperature i guess this happens because water compared to air is a liquid it has (greater density, it s directly in contact with our body)
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When 2.56 g of a compound containing only carbon, hydrogen, and oxygen is burned completely, 4.89 g of CO2 and 3.00 g of h2o are
victus00 [196]

Answer:

The empirical formula is CH3O2

Explanation:

From The question, number of moles of CO2= 4.89/44=0.111mol

Number of moles of H2O=3/18= 0.1667moles

Since 1mole of CO2 contains 1mole of carbon and 2 moles of O2,

Implies that there 0.111 moles of C and 0.222moles of O2

Similarly also 0.1667moles of water contains 2 moles of H2 hence = 0.333 moles of H2

Dividing by smallest number= 0.111mol

For C = 0.111/0.111= 1

For H = 0.333/ 0.111= 3

For O = 0.222/0.111= 2

Hence the empirical formula= CH3O2

3 0
3 years ago
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4 0
3 years ago
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When a solid with a mass of 53.78 g is added to 50.0 ml of water in a graduated cylinder, the volume increases to 56.4 ml. Calcu
Bad White [126]

Answer:

<h3>The answer is 8.40 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

volume = final volume of water - initial volume of water

volume = 56.4 - 50 = 6.4 mL

We have

density =  \frac{53.78}{6.4}  \\  = 8.403125

We have the final answer as

<h3>8.40 g/mL</h3>

Hope this helps you

3 0
3 years ago
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Answer:

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Explanation:

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Rank the following metals in order of increasing activity: Pb, Mg, Cu, and Ag
Goryan [66]
They would be the following

Mg, Pb, Cu, Ag
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