The number of atoms in a mole of any pure substance is called

43. Which temperature change would cause a sample of an ideal gas to double in volume while the pressure is held constant? (1) from 400. K to 200. K (2) from 200. K to 400. K (3) from 400. oC to 200. oC (4) from 200. oC to 400. oC

Two or more atoms can be held together shared

Which of the following is not a current theory regarding global climate change? a. Global warming will stimulate crop growth. b. Even the moderate projections on global warming will cause devastation. c.

The diagram below shows a cell placed in a solution. What will happen to the cell?

Is potassium a metal, non metal or metalliod

Distinguish between a carbohydrate and a protein

5. Noble gases, the elements in group 18 of the periodic table, do not react easily with other elements. Explain why you think they are not very reactive.

Which elements in the periodic table are metalloids or have semimetallic properties? A) N and Br B) As only C) Br only

How is 6.3 written in scientific notation

Is it possible for the overall charge of an ionic compound to be - 1. true false