Please: Only 5 minutes to answer :( 1: Why do we need to know the "Launch Window" for Mars?
It is when the correct side of Mars is facing the earth
It is during the Mars winter
It is when earth and Mars are closest together
It is when the cheapest airfares to Mars are available.

2: Why is it important to find Hydrogen and Carbon Dioxide on Mars.
So we can communicate with Earth
So we can have pollution on Mars when we get there.
So we can produce breathable air , fuel and water
So we can drive solar cars

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.

The vapor pressure of ethanol is 1.00 × 102 mmhg at 34.90°c. what is its vapor pressure at 61.61°c? (δhvap for ethanol is 39.3 kj/mol.)

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?