Which balanced equation represents a chemical change? A) H2O () + energy → H2O (g) B) 2H2O () + energy → 2H2 (g) + O2 (g) C) H2O () → H2O (s) + energy D) H2O (g) → H2O () + energy

What's a mixture when two substances are mixed completely

Name organic compounds

What are the energy in a plant?

The most common system of measurement used by scientists is called the?

Pure phosgene gas (COCl2), 0.0320 mol, was placed in a 1.50-L container. It was heated to 870.0 K, and at equilibrium, the pressure of CO was found to be 0.495 atm. Calculate the equilibrium constant KP for the reaction.

What is the mass number of an ion with 107 electrons, 157 neutrons, and a 1 charge?

Which of the following is true about compounds

According to the chart, which substance has the lowest OH' concentration? A) urine lemon juice tomato juice D) black coffee

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell? (1) oxidation (3) neutralization (2) reduction (4) transmutation

Which of the following is true? A) Gas atoms subjected to electricity emit bright lines of light. B) Gas atoms absorb white and emit a continuous spectrum of light. C) Gas atoms under high pressure emit dark lines against a continuous spectrum.