a mixture of gases contains He (g) and Ne (g). the total pressure of the atmosphere in the container is 600 mmHg and the partial pressure of Ne (g) is 439 mmHg. Calculate the partial pressure of He (g) one the container.

How many moles of water are in 24.3 grams of water?

Write orbital diagrams (boxes with arrows in them) to represent the electron configurations of carbon before and after sp hybridization.

What is a solution? Are all mixtures solutions? Are all solutions mixtures?

The notation for the nuclide gives information about

Digby wants to determine how many calories are in his bag of chips. Which calorimeter should he use? coffee cup calorimeter bomb calorimeter He could use both types of calorimeters. He cannot use either.

What is an isotope? Give an example of an element with isotopes.

Consider the reaction between liquid water and aqueous magnesium nitride to form solid magnesium oxide and ammonia gas. If magnesium nitride is present in excess, how many moles of water are needed to form 9.17*1023 ammonia molecules?

The properties of elements are arranged by ... A. mass numbers B. atomic masses C. atomic radii D. atomic numbers

When a tire is inflated with air is it a chemical or physical change?

Which isotope is used to date ancient artifacts such as fossils? carbon-12 carbon-14 uranium-238 oxygen-16