Which is evidence that a chemical Reagan occurred?

A. A phase change occurs

B. A new gas is observed in the form of bubbles

C. Red and yellow paint mixing to make orange

D. The temperature of the substance remains constant updates

A 23.0g sample of a compound contains 12.0g of C, 3.0g of H, and 8.0g of O. What the empirical formula of the compound

The chemical standard for the quantity of a mole is based on which substance? a. hydrogen-1 b. helium-2 c. oxygen-16 d. carbon-12

One application of Hess's Law (which works for ΔH, ΔS, and ΔG) is calculating the overall energy of a reaction using standard energies of formation of products and reactants.

What happens if you consume bleach?

What is the difference between atomic mass and atomic number

An aqueous solution at 25∘C has a hydronium ion concentration of 3.2*10-9 M. What is the hydroxide ion concentration of the solution? Write your answer in scientific notation. Use the multiplication symbol rather than the letter x in your answer.

What is the electron configuration of a sulfur atom in the ground state?

Unsaturated fatty acids are often classified according to the number of carbon atoms between the terminal methyl carbon (the omega carbon) and the closest double bond to the methyl end of the chain.

Suppose the average concentration of copper in water is measured to be 2.5 x 10" M. a. Express this concentration in mg/L. b. Express this concentration in ug/L. c.

If I add water to oil what will happen