Which of the following equations is balanced? 0 2P+O2 → P205
O4P+202 → 2P405
O P+202 → POZ
4P+502 → 2P205

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

Abike ride event is 30 miles. a first aid tent is put at the 3/4 mark of the course. how many miles from the starting point is the first aid tent?

What is the daughter nucleus produced a. when 217(at) undergoes alpha decay? b. when 103(mo) undergoes beta decay? c. when 188(hg) undergoes positron emission?