13. normal body temperature is 37.0 °c. what is the corresponding fahrenheit temperature? 14. what is the…

13. normal body temperature is 37.0 °c. what is the corresponding fahrenheit temperature? 14. what is the mass in kilograms of 680 ml of a substance that has a density of 0.930 g/ml 15 an object has a mass of exactly 5 g on an analytical balance that has an accuracy of many significant figures should this mass be recorded?

Answer

13.

Explanation:

Step1: Recall conversion formula

The formula to convert Celsius to Fahrenheit is $F=\frac{9}{5}C + 32$.

Step2: Substitute value

Substitute $C = 37.0$ into the formula: $F=\frac{9}{5}\times37.0+32$. First, calculate $\frac{9}{5}\times37.0 = 9\times7.4=66.6$. Then, $F=66.6 + 32=98.6$.

Answer:

$98.6^{\circ}F$

14.

Explanation:

Step1: Recall density - mass - volume formula

The density formula is $\rho=\frac{m}{V}$, where $\rho$ is density, $m$ is mass and $V$ is volume. We can re - arrange it to $m=\rho V$.

Step2: Substitute values

Given $\rho = 0.930\ g/mL$ and $V = 680\ mL$. Then $m=\rho V=0.930\times680 = 632.4\ g$.

Step3: Convert grams to kilograms

Since $1\ kg = 1000\ g$, then $m=\frac{632.4}{1000}=0.6324\ kg$.

Answer:

$0.6324\ kg$

15.

Explanation:

The mass is given as exactly 5 g. Since the balance has an accuracy, and the value is given as a whole number without any decimal places, the number of significant figures is 1.