If an HPLC procedure is running at a pressure of 5.48×10^8 Pa what is it’s running pressure in torr

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

Correct relationship between molecular formula and empirical formula

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device