Is melting a piece of wax a physical or chemcial change

he rate constant for this zero‑order reaction is 0.0130 M ⋅ s - 1 at 300 ∘ C. A ⟶ products How long (in seconds) would it take for the concentration of A to decrease from 0.890 M to 0.280 M?

Which units express specific heat capacity? J/°C, J/K, cal/°C, cal/K J / (gi°C), J / (giK), cal / (gi°C), cal / (giK) J, cal °C, K

How many moles of hydrogen gas are present in a 50 liter steel cylinder if the pressure is 10 atm and the temperature is 27 degrees Celsius?

What is the term for molten material found below Earth's surface? lava basalt magma gabbro

What is the value of q when the solution contains 2.00*10-2 m sr2 + and 1.50*10-3m cro42-?

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is

What is an oxidizing agent?

In times of hot dry weather some cities ban the use of garden sprinklers why do you think there is such a rule