1. How many significant figures are in the following measurements?What is the uncertainty in each of the measurements?
(a) 1508 cm (b) 300.0 ft (c) 20.003 Ib (d) 0.00705 gal

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

Which statement are accurate about snow flakes