What indicates a chemical change?

A) Change from a liquid to a gas

B) Change in the amount of material

C) Change in the type of substance present

D) Change in the texture of a substance

Which expression could represent the concentration of a solution? A) 3.5 g B) 3.5 M C) 3.5 mL D) 3.5 mol

What is the [h3o+] for a solution at 25°c that has poh = 5.640?

Four molecules have carbon as the central atom and hydrogen atoms around it. Which shape would give rise to a polar molecule?

The wavelength of light that has a frenquency of 1.20x10^13s^-1

2Co3 + (aq) + 2Cl - (aq) →2Co2 + (aq) + Cl2 (g). E∘=0.483 V what is the cell potential at 25 ∘C if the concentrations are [Co3+] = 0.133 M, [Co2+] = 0.107 M, and [Cl-] = 0.334 M, and the pressure of Cl2 is PCl2 = 8.60 atm?

Name the two sub-atomic particles in the nucleus of an aluminium atom.

Identify the true statement. Choose one: A. The expansion of ice sheets at the end of the Pleistocene caused glacial rebound in northern Canada. B. Regions covered by glacial ice are termed periglacial environments. C.

What is the concentration when 0.065 moles of NaNO3 are dissolved in enough water to make 150.0 mL of solution?

What are the reactants and products of cellular respiration and photosynthesis?

Which situation would probably NOT result in the formation of new species? A) The introduction of a predatory fish that only eats the largest native bass in a Georgia lake.