100 g of radioactive mass has a half life

of 5 days Calculate the mass decayed

off after 15 days

The granular fertilizer 11 -11 -11 is composed of 11 % nitrogen, 11 % phosphate, and 11 % potassium. similarly, the fertilizer 19 -17 -0 is composed of 19 % nitrogen, 17 % phosphate, and 0 % potassium.

Matter is niether created nor destroyed in any chemical change. Is this a theory or a law?

A molecule with an un even charge is referred to as being?

Which compound can act as both a Bronsted-Lowry acid and a Bronsted-Lowry base? a. water b. ammonia c. sodium hydroxide d. hydrochloric acid

All are ways to combat water pollution except

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?

What element has 8 valence electrons

Which of the following best describes a metal? Brittle, shiny, and solid Brittle, dull, and low density Malleable, shiny, and able to conduct heat or electricity Malleable, dull, and solid, liquid, or gas at room temperature?