When a candle is cooling down is it a physical or chemical change

If a "universal solvent" could dissolve anything, what problems might you imagine that would cause in everyday life?

What are all the ways scientists do investigations

A change of phase never accompanies a. a change in volume b. a change in pressure c. a change in temperature d. a change in density e. a change in structure

Which species in each pair is a better oxidizing agent under standard-state conditions? (a) br2 au3 + (b) h2 ag + (c) cd2 + cr3 + (d) o2 in acidic media o2 in basic media?

How many moles are in 88.1 g of Mg

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike

Uranium nuclei split during nuclear fission true or false

Calculate the mass of 2.25*10^22tungsten atoms.