Question

question 38
1 pts
which equation represents a solution for the temperature t in the equation below:
pv = nrt
t = pv/nr
t=(pv)x(nr)
t = pn/vr
t = nr/pv
question 39
1 pts
an fossil specimen is found to be 65,200 years old. how many significant figures are there in this measurement?
infinite
three
five
four

Explanation:

Question 38

Step1: Isolate T in PV = nRT

Divide both sides by nR.
$T=\frac{PV}{nR}$

Non - zero digits are always significant. Trailing zeros in a number without a decimal point may or may not be significant. In the number 65200, the non - zero digits 6, 5, and 2 are significant. The two trailing zeros are not significant as there is no decimal point. So there are three significant figures.

Answer:

T = PV/nR

Question 39