Is phosphorus dissolving in carbon disulfide a chemical or physical change? please explain ​

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

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these