4 years ago

Why is it so difficult to obtain pure water

1 answer:

6 0

One big reason is that farmers use lot's of chemicals for their plants to grow and those chemicals can get into drinkable water. Another reason is that almost 96.5% of earth's water is salt water which is really undrinkable. Hope this helped you! :D

You might be interested in

A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The

Anna35 [415]

Answer:

-24.76 kJ/g; -601.8 kJ/mol

Explanation:

There are two heat flows in this experiment.

Heat from reaction + heat absorbed by calorimeter = 0

q1 + q2 = 0

mΔH + CΔT = 0

Data:

m = 0.1375 g

C = 3024 J/°C

ΔT = 1.126 °C

Calculations:

0.1375ΔH + 3024 × 1.126 = 0

0.1375ΔH + 3405 = 0

0.1375ΔH = -3405

ΔH = -24 760 J/g = -24.76 kJ/g

ΔH = -24.76 kJ/g ×24.30 g/mol = -601.8 kJ/mol

3 0

3 years ago

Which of the following is a compound machine?

Burka [1]

A compound machine is that which is composed of two or more simple machines. Simple machines come in 6 basic types: (1) wheel and axle, (2) inclined plane, (3) wedge, (4) pulley, (5) screw, and (6) lever. Among the choices given above, the compound machine is the can opener for it is a combination of a wedge and a lever.

3 0

4 years ago

Which of the following actions demonstrates compression of a gas? exhaling air from your lungs lighting a fire turning on an ele

wariber [46]

Exhaling air from your lungs

5 0

3 years ago

Read 2 more answers

Answer Quick

kow [346]

Answer:

20.9%