The mass of gas A is 11.56. i got this answer by 0.68 multiplied by 17. because in this problem the key word is times.
Oxygen,hydrogen, and carbon
Answer:
Yes.
Explanation:
If you want to use the least fuel, then missions to Mars are feasible every two years.
You want to launch when Earth and Mars are close together, and this happens <em>about every 26 months</em>.
However, Earth travels faster than Mars, so the spaceship must launch when Mars is 44° <em>ahead </em>of Earth in its orbit.
The ship will then use the most efficient trajectory to arrive at Mars.