Which of the following statements is true?

Saltwater can be treated and used for drinking water.

One atmosphere is equal to 100 pounds per square inch (psi).

The temperature of ocean surface water depends on salinity.

Earth has one high tide and one low tide every tidal cycle.

Saltwater can be treated and used for drinking water.-> True

Salt and water may be separated by physical or chemical media and the water purified.

One atmosphere is equal to 100 pounds per square inch (psi).-> False

1 atm ≈ 14.7psi

The temperature of ocean surface water depends on salinity - > False

There are other factors: geographical ubication and day time, for example.

Earth has one high tide and one low tide every tidal cycle-> False

The number of high and low tides in a cycle vary.