Which of the following is a convention of graph making?

a) the data must be capable of being plotted as a straight line.

b) dependent variables are omitted.

c) there must be at least 10 numbers on each axis.

d) the independent variable is on the x-axis.

Which substance can be broken down by chemical means

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.