Any of two or more forms of the same element which differ only in the number of neutrons their atoms contain is called an:

A. irregularity

B. isomer

C. isotope

D. irritability

A chemist wade out 5.96 grams of barium calculate the number of moles of barium she weighed out

What kind of evidence would convince you that all matter is really made up of collections of tiny particles?

Is the dissolution of ammonium chloride in water an exothermic or endothermic process.

What does it mean that gold has a specific heat capacity of 0.135 J/g*C

Given 7.58 ml of 2.00m naoh, calculate the number of grams of naoh in the solution.

The pressure in an automobile tire filled with air is 245.0 kPa. If Po2 = 51.3 kPa, Pco2 = 0.10 kPa, and P-others = 2.3 kPa, what is Pn2?

What is the volume of 1 mole of helium gas when the pressure is 1.47 atm and the temperature is 287k

Jenny and anne wanted to see who could throw the ball the hardest. they decided to each throw a ball against the wall as hard as they could and measured how far the ball rolled away from the wall. what might be the variables in this experiment;

Is calcium carbonate chemical change?

The mass number of an element is the sum of the number of