Which Of These Is An Indication That A Chemical Reaction Has Occurred?

A. Freezing Of A Substance

B. Melting Of A Substance

C. Boiling Of A Substance

D. Formation Of A Gas

In which phase transition do molecules directly move from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles? A. evaporation B. sublimation C. freezing D. deposition

Sulfur molecules exist under various conditions as S2, S, S4, S6, and S8. Which of the following statements are true? a) The number of sulfur atoms in one mole of each of these molecules is the same.

Burning soybean oil is similar to what other chemical reaction?

Where do you place the symbols that represent the state of matter in an equation?

Type the letter that represents the correct location for each particle type below. The neutron is found at. The electron is found at. The proton is found at.

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?