Why are numbers placed before the elements and molecules in a

chemical equation?

A cracked egg cooks in an iron skillet. the bottom of the egg cooks faster than the top. how is heat being added to the egg?

What was John Dobereiner's contribution to the development of the periodic table

Which is the SI unit for pressure? Pa Torr psi inHg

Blood cells. What two effects will such a condition have on the patient?

Determine the minimum number of theoretical plates, N, required to achieve baseline separation with a resolution that is desirable for quantitative analysis of two compounds with an adjusted relative retention, α, of 1.051 and retention factors of 5.

Which of the following is the correct scientific notation for 0.000451 g? 4.5 x 10-3 4.5 x 10-5 4.51 x 10-4 45.1 x 10-4

A phase change from a solid to a gas is called what

What is hydrocarbon?

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.