Author Question: Round the number 0.00637 to two significant figures. A) 0.0064 B) 0.006 C) 0.00637 D) 0.0 E) ... (Read 27 times)

mpobi80 · **on:** Aug 27, 2018

Round the number 0.00637 to two significant figures.

A) 0.0064
B) 0.006
C) 0.00637
D) 0.0
E) 0.0063700

Question 2

A sample of calcium carbonate CaCO3 (s) absorbs 40.3 J of heat, upon which the temperature of the sample increases from 20.8 C to 27.3 C. If the specific heat of calcium carbonate is 0.82 J/g-K, what is the mass (in grams) of the sample?

A) 7.6 g
B) 5.1 g
C) -7.6 g
D) 0.13 g
E) 5.3 g