The average surface temperature of mars is estimated to be -55°c. what is this temperature on the fahrenheit scale? -99°f -63°f -12°f -67°f

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.

What is the answer to these problems 30 pt