How much energy does a photon of frequency 6 x 1012 Hz have? A. 2.21 x 19^-42 J
B. 3.98 x 10^-21 J
C. 1.10 x 10^-46 J
D. 1.988 x 10^-25 J

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)

Write a balanced equation showing the formation of copper (ii) nitrite from its elements