Which of these is a physical property? A) ability to burn a piece of paper
B) pure sodium reacts violently with water
C) the boiling point of water is 100 degrees
D) helium does not tend to react with anything

What happens to energy in an open system?

When the volume and number of particles of a gas are constant which of the following is also constant

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.