How many grams of C3H8 must be used to produce
3.75 X 1024 molecules of CO2 gas?
C3H8 + 5O2 → 3CO2 + 4H2O

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Stage in which a typical star has completely stopped fusion

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?