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Elza [17]
3 years ago
8

2. In most reactions, energy is converted into what?

Chemistry
1 answer:
Lelu [443]3 years ago
8 0
Chemical energy

After a reaction, a chemical substance is formed
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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

<u>For water:  </u>

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}  

Mass of water  = 50 kg

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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Would the glove, the block of wood, and the glass place stay the same temperature?
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no. The metal would be the hottest
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Which part of the food web is NOT a living thing?
stiks02 [169]

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the sun

Explanation:

the sun is not alive and plants use photosynthesis to eat the radiation emitted by the sun.

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Drag the types of electromagnetic waves to place them in order of increasing frequency.
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Ultraviolet Light has the highest frequency between the three, Visible Light would stay in the middle since its in the middle of the spectrum, thus making Infrared the lowest.

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Which of the following chemical reaction are redox reactions: PCl3 + Cl2 ® PCl5 Cu + 2AgNO3 ® Cu(NO3)2 + 2Ag
zvonat [6]

Explanation:

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