If Plank's constant is 6.6 x 10 (-34) J/Hz, then what is the approximate frequency of a photon having an energy of 3 x 10 (-19) Joules?

Adding a catalyst to a system at equilibrium lowers the activation energy required by a system, which shifts the equilibrium position toward the products

The atomic number of an element represents the number of element

What is the chemical formula for potassium oxide

How does the density of aluminum compare to the density of gold? What does this tell you about the amount of matter within each?

What occurs in the chemical reaction (A) reactions break bonds and reform the same bonds (B) no chemical bonds are broken (C) reactants break bonds and form new bonds to make new substance (D) reactants break bonds but do not form new substances

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves