Which is not an example of a code? Choose the correct answer.

A. a secret

B. a memory from the past

C. the sign language alphabet

D. the information on a credit card

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never

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

Condensation happens when water vapor cools. true or false? ?