How many molecules of dna would result from one molecule after three cycles of pcr

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

If 10.5 l of a at 0.98to 1.50 , is ?