Which of these is a chemical change

a / fire works eploding

b/grinding powder

c/iorning shirt

Which of the following describes an exothermic reaction? Thermal energy is absorbed by the system. Thermal energy is absorbed by the surroundings. Thermal energy is not transferred. The initial and final temperatures of the system remains the same.

Phosphoglucoisomerase interconverts glucose 6‑phosphate to, and from, glucose 1‑phosphate. phosphate phosphoglucoisomerase glucose 6 - ⇌ glucose 1 - phosphate After mixing equal amounts of the two molecules, the solution achieved equilibrium at 25 ∘

How many spatial orientations are available for the p sublevel

If honey has a density of 1.36 g/ml what is the mass of 1.25 qt reported in kilograms

When an atom becomes a positive ion, the radius of the atom (1) decreases (2) increases (3) remains the same

Sahil watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. the ending substances did not look the same as the starting substances.

How many molecules of H2S are required to form 79.0 g of sulfur

How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution

Which term refers to an electrochemical cell that produces an electric current? A) electrolyte B) voltaic cell C) electrolytic cell D) cathode

How can you determine the valence electrons in an electron configuration?