Compared with Nitrogen, Do We Need to Be Concerned That

question 107

Multiple Choice

Compared with nitrogen, do we need to be concerned that we may run out of phosphates?

• A)Yes. Nitrogen is obtained from nitrogen gas, which is in virtually infinite supply. Phosphate is mined from sedimentary rock and deposits are limited.
• B)Yes. Nitrogen is obtained from ammonia, which is in virtually infinite supply. Phosphate is mined from sedimentary rock and deposits are limited.
• C)No. Although phosphate is mined from sedimentary rock, deposits are extensive enough that we can consider them virtually unlimited, just like nitrogen gas.
• D)No. Although phosphate is mined from sedimentary rock, deposits are virtually unlimited, just like the ammonia from which we derive our nitrogen.
• E)No. Both phosphate and nitrogen are readily available as gas from the atmosphere.

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