Question

Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. If the density of water is 0.990 g/mL at 45°C, how many kilograms of water are required for a person to walk 30 kilometers in Death Valley?

Answer 1

8.73 is your answer ;)

Explanation:

Answer 2

The answer to your question is mass = 8.73 kg

Explanation:

Data

1 quart ----- 2 mi

density = 0.99 g/ml

total distance = 30 km

Process

1.- Convert 2 mi to km

1 mi ------------------- 1.61 km

2 mi ------------------ x

x = (2 x 1.61)/1

x = 3.22 km

2.- Calculate the quarts drank

1 quart --------------------- 3.22 km

x --------------------- 30 km

x = (30 x 1)/3.22

x = 9.32 quarts

3.- Convert quarts to milliliters

1 quart --------------------- 946.35 ml

9.32 quart ------------------- x

x = (9.32 x 946.35) / 1

x = 8817 ml

4.- Calculate the grams of water

density = mass / volume

mass = volume x density

-Substitution

mass = 8817 x 0.99 g/ml

-Result

mass = 8729 g

5.- Convert to kg

mass = 8729/1000 kg

mass = 8.73 kg