What happens when light strikes an opaque object?

Which of these is an indication that a chemical reaction has occurred? Select all that apply: melting of a substance boiling of a substance formation of a new gas formation of a precipitate a new smell is given off heat is released

Calculate the ph of a solution in which [oh-]=7.1*10-3m. express the ph of the solution to two decimal places.

4HCl (g) + Si (s) ⇌ SiCl4 (l) + 2H2 (g) would be classified as a (n) :

What happens when an acid reacts with a metal such as magnesium?

Magnesium phosphate formula

Hf is a stronger acid than nh + 4. which base would be stronger: f - or nh3? 1. f - 2. both bases would be equal in strength. 3. nh3 4. cannot tell from the information given. 5. neither f1 - nor nh3 would be bases.

The concentration of commercially available concentrated nitric acid is 70.0 percent by mass, or 15.9 M. Calculate the density and molality of the solution.

Whats 2 properties of iron?

Which light packs the highest energy per photon

Which of the following hydrocarbons will most likely be found around cows?