A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is

13.9

nm

. What is the total width of a crystal in millimeters

105

molecules across? Write your answer as a decimal.

Cation and anion for Fe (NO2) 2

What happens to the particles of substances when a chemical change occurs.

What physical properties affect an object's gravitational pull? a) weight b) size c) shape d) all of the above

What occurs when a cell engulfs large food particals

What condition of the gas remains constant?

If one object has more mass than another then it weighs more or less than the other object?

What is most believed by most scientists about the age of our solar system.

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be

An electrolyte is a substance that will conduct electricity when dissolved in water. a substance that conducts electricity well is a strong electrolyte. a substance that conducts electricity poorly is a weak electrolyte.

Energy is required to produce a chemical change during (1) chromatography (2) electrolysis (3) boiling (4) melting