The flame from my candle gives off black smoke heat and light what type of changes do these indicate

How much heat is required to heat 9.61g of ethanol (ch3ch2oh) from 24.1 c to 67.3 c?

What is the mass of volume = 5.4 mL density = 2.5 g/mL

A mixture of hydrogen and oxygen gases has a total pressure of 5.50 atm. What is the partial pressure of the hydrogen if the P (O2) = 1.65 atm?

Why does something cold, like ice, feel cold on our skin?

Write the chemical equations for each of the reactions described below: 1) When aqueous beryllium chloride reacts with aqueous silver nitrate, aqueous beryllium nitrate and solid silver chloride form.

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?