Which of the following is closest to the meaning of the term ancestor?

A. a relative from long ago

B. an organism that has evolved

C. a trait that has changed over time

D. an organism that is adapted to its environment

What's a hypothesis for Which fruit contains the most vitamin c?

Which of the Group 15 elements can lose electron most readily? 1) N 2) P 3) Sb 4) Bi

Consider the following chemical reaction:. CuSO4 (s) + heat - - > CuO (s) + SO3 (g). Design an experiment in which you use this chemical reaction to test the law of mass conservation

When are the products of an equilibrium reaction favored? A. When the reaction is endothermic. B. When the equilibrium constant is large. C. When the macroscopic properties are constant. D. When the activation energy of the forward reaction is high.

Do simple molecules conduct electricity? and why?

Which of these represents a chemical change?

A chemist measures the amount of iodine solid produced during an experiment. she finds that 1.6 g of iodine solid is produced. calculate the number of moles of iodine solid produced.

Write the equilibrium constant: Pb3 (PO4) 2 (s) = 3Pb2 + (aq) + 2PO2 (aq)

How many orbitals are there in the shell with n = 4?

Using the balanced equation shown below, calculate the mass of c3h8 that must react in order to release 2.45*106 * 106 kj of heat. δhrxn = - 2219.9 kj