How many significant figures in each of the following: A. 60 s = 1 min
B. 900. meters =
C. 8.006 x 10^2 gram=
D. 0.074 meters=
E.9,000,000km =

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize