Which type of chemical change is produced when a match is lit? A. change in temperature
B. change in color
C. production of a solid
D. production of a gas

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.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

All motion is caused by force? true or false