Which of the following isotopes would most likely be unstable and therefore radioactive?

helium-3

calcium-40

molybdenum-98

mercury-194

What is the reaction of three different chemicals when mixed and separated

The correct name for the ion Fe2 + is

How many moles of ions will be present in 716 ml of 0.450 m solution of sodium phosphate (aq) ?

A 30.00 ml ba (oh) 2 solution of unknown concentration was neutralized by the addition of 32.83 ml of a 0.1382 m hcl solution. write the balanced molecular equation for the neutralization reaction between hcl and ba (oh) 2 in aqueous solution.

In saturated organic compounds, all the bonds between carbon atoms are called?

In which choice is the ellipsis used correctly to select from this sentence from The Scarlet Letter? A throng of bearded men, in sad-coloured garments and grey steeple-crowned hats, inter-mixed with women, some wearing hoods, and others bareheaded,

Explain the difference between the greenhouse effect and global warming.

How does adding salt affect the surface tension of water? if it increases surface tension, will it always increase it?

Which usually has a higher temperature? A city or the areas around the city?

Toluene and pyridine form ideal solutions. Consider a solution of toluene and pyridine prepared at 25°C. Assuming that the mole fractions of toluene and pyridine in the vapor phase are equal, calculate the composition of the solution.