253243 **How** **many** **metric** **tons** **of** **5**%-**S** **coal** **would** **be** **needed** **to** **yield** **the** **H2SO4** **required** **to** **produce** **a** 1.5-**cm** **rainfall** **of** **pH** **2.00** **over** an **area** **of** **100** square kilometers?

**The** solution calculates **the** amount **of** **coal** **needed** **to** **yield** **the** **H2SO4** **required** **to** **produce** **a** 4.5 **cm** **rainfall** **of** **pH** **2.00** **over** an **area** **of** **100** square kilometers.

41786 Producing **a** **Rainfall** Using **H2SO4** Producing **a** **Rainfall** Using **H2SO4** It is best **to** break this one into parts.
Volume **of** **the** rain **to** cover **100** square kilometers with 4.0 **cm** **of** **rainfall**.

Ewen
This solution gives **the** amount **of** **metric** **tons** **of** **5**%-**S** **coal** **needed** **to** **produce** **a** given amount **of** **pH** **over** **a** specified **area**.

29558 Amount **of** **Coal** **Needed** **to** **Produce** **a** **pH** **of** 2 Amount **of** **Coal** **Needed** **to** **Produce** **a** **pH** **of** 2 **The** concentration is [H+] is 10^-**pH**. e.g If **the** **pH** is **5** then [H+] is 10^-**5** mol/L
Because **H2SO4** gives two H+ ions, **the** concentration **of** **H2SO4** is half that

Now, we need **to** know **how** much **coal** it **would** take **to** **produce** this **many** joules.

You might want **to** check out this site for **a** full explanation:
http://artsci-ccwin.concordia.ca/facstaff/**a**-c/bird/c206/notes/chapter14.html
Hope this helps
Thanks again
Yinon It finds **the** amount **of** **metric** tonnes **of** **5**%-**S** **coal** that could **produce**

At this rate, what mass **of** 235U (kg) **would** it consume per year if **the** efficiency **of** converting nuclear energy **to** electricity is 33%? **How** **many** **metric** **tons** **of** **coal** **would** **be** **required** **to** supply **the** same amount **of** electricity?

Next we need **to** determine **how** **many** hectacres are in **a** square km.
One sq. km = **100** hectares
So we know that we are dealing with 50,000,000 x **100** = **5** billion hectares. We need it **to** **produce** **a** total **of** 200 EJ, or 200 billion GJ.

**The** radius **of** **a** solid sphere is measured **to** **be** (6.50 Â± 0.20) **cm**, and its mass is measured **to** **be** (1.85 Â± 0.02) kg. Determine **the** density **of** **the** sphere in kilograms per cubic meter and **the** uncertainty in **the** density.