Find the resultant in the x-direction , rx and y-direction , ry for f1 = 2.5n in the positive x-direction f2 = 1n in the negative x-direction f3= 2n in the positive y-direction f4=3n in the negative y-direction

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.