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loris [4]
3 years ago
15

Which of the following is not a cause of water pollution?

Chemistry
1 answer:
olga_2 [115]3 years ago
8 0
The answer is A. Industrial waste
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Please help, 15 points
oee [108]

1rst is D, second is A

Explanation:

5 0
3 years ago
A bomb calorimeter has a heat capacity of 783 J/oC and contains 254 g of water whose specific heat capacity is 4.184 J/goC. How
IrinaK [193]

Answer : The amount of heat evolved by a reaction is, 4.81 kJ

Explanation :

Heat released by the reaction = Heat absorbed by the calorimeter + Heat absorbed by the water

q=[q_1+q_2]

q=[c_1\times \Delta T+m_2\times c_2\times \Delta T]

where,

q = heat released by the reaction

q_1 = heat absorbed by the calorimeter

q_2 = heat absorbed by the water

c_1 = specific heat of calorimeter = 783J/^oC

c_2 = specific heat of water = 4.184J/g^oC

m_2 = mass of water = 254 g

\Delta T = change in temperature = T_2-T_1=(23.73-26.01)=-2.28^oC

Now put all the given values in the above formula, we get:

q=[(783J/^oC\times -2.28^oC)+(254g\times 4.184J/g^oC\times -2.28^oC)]

q=-4208.28J=-4.81kJ

Therefore, the amount of heat evolved by a reaction is, 4.81 kJ

7 0
3 years ago
What is it called when a substance changes from a vapor to a liquid
skad [1K]
The answer is CONDENSATION.
4 0
3 years ago
Calculate the number of moles in 456 grams of lead, Pb
Kamila [148]
Mass 456
relative mass 82
moles
mass = rm x moles
456/82 = 5.5609756....
8 0
3 years ago
Explain what happens to temperature and energy as molecules move from gas to liquid to solid
aleksley [76]

Answer and Explanation:

As the temperature of the substances increases, the average energy of the molecules increases, and average energy of attraction between the molecules decreases consequently intermolecular spacing between the molecules increases. As a result, a substance change in succession from gas to liquid to solid.

7 0
3 years ago
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