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adell [148]
3 years ago
7

Suggest two reasons why copper should not be disposed of in landfill sites

Chemistry
1 answer:
ale4655 [162]3 years ago
7 0
  pollute the water, the air, and also the soil. chemicals can spread into the water table or into waterways.  increase the chances of global warming by releasing methane, a dangerous greenhouse gas.
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Please review the attachment
astra-53 [7]

Answer: The correct answer is -297 kJ.

Explanation:

To solve this problem, we want to modify each of the equations given to get the equation at the bottom of the photo. To do this, we realize that we need SO2 on the right side of the equation (as a product). This lets us know that we must reverse the first equation. This gives us:

2SO3 —> O2 + 2SO2 (196 kJ)

Remember that we take the opposite of the enthalpy change (reverse the sign) when we reverse the equation.

Now, both equations have double the coefficients that we would like (for example, there is 2S in the second equation when we need only S). This means we should multiply each equation (and their enthalpy changes) by 1/2. This gives us:

SO3 —>1/2O2 + SO2 (98 kJ)

S + 3/2O2 —> SO3 (-395 kJ)

Now, we add the two equations together. Notice that the SO3 in the reactants in the first equation and the SO3 in the products of the second equation cancel. Also note that O2 is present on both sides of the equation, so we must subtract 3/2 - 1/2, giving us a net 1O2 on the left side of the equation.

S + O2 —> SO2

Now, we must add the enthalpies together to get our final answer.

-395 kJ + 98 kJ = -297 kJ

Hope this helps!

8 0
3 years ago
Read 2 more answers
How fast do i have to run 250 m in 30 seconds
elena-14-01-66 [18.8K]

Answer:

S=D/T

250/30= 8.33 miles

Explanation:

7 0
3 years ago
Why does the pressure inside a container of gas increase?
yan [13]
Pressure is a scientific parameter that allows us to determine the amount of force being exerted per unit area. The increase in the pressure inside a container containing a gas may be brought upon by the decrease in volume, increase in temperature, or merely by additional of more gas molecules. 
3 0
3 years ago
Clary ran 20 miles in four hours. What was her average speed?
Nady [450]

5 miles per hour

20/4=5

4 0
3 years ago
Read 2 more answers
Haber was able to manufacture large amounts of ammonia, what do plants convert ammonia into?
suter [353]

Answer:

Nitrates.

Explanation:

They convert ammonia to nitrates.

3 0
3 years ago
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