The gram formula mass of a compound is 48 grams. the mass of 1.0 moles of this compound is

(1) 1.0g
(2) 4.8g
(3) 48g
(4) 480g

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.