A group of students conducted an experiment to determine the effect of heat on the germination(sprouting) of sunflower seeds. Which of the variables listed below is the least important to control in this experiment? a
the temperature of which the seeds are heated
b
the length of time the seeds are heated
c
the type of soil used
d
the amount of moisture in the soil

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?

How many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride