The cycling of rising and falling magma in the mantle is called a . A. Convection current
B. Radioactive decay cycle
C. Magnetic oscillation
D. Heat cycle

Name the element in group 17, period 2. (periodic table)

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal