How many significant figures are there in 500 and 101.00?

A sealed container contains 0.10 moles of nitrogen gas and 0.20 moles of oxygen gas. If Temperature of the mixture is constant, which of the followimg is true a Molecular Masses of 2 gases are the same.

This is the chemical formula for acetic acid (the chemical that gives the sharp taste to vinegar) : CH_3CO_2H An analytical chemist has determined by measurements that there are 0.054 moles of oxygen In a sample of acetic acid.

Lithium has 2 isotopos. One has a mass of 16.015 AM and the other 7.016 ANU. The on average atomic mass is 6.941 AMU. What are the lo abundances of each (to 2 decimal places) ?

A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely reason for this? The Bunsen burner was not properly adjusted. The test tube holder was used to hold the copper wire.

Phenolphthalein solution is used as an indicator of acids and bases. If added to an ammonia-based solution of window cleaner, we would expect the solution to turn A) blue. B) brown. C) pink. D) yellow.

How many atoms are there in 2.3 grams of H?

Which of the following would dissolve in water, and why? None of these substances would dissolve in water Candle wax, it is a nonpolar substance Motor oil, its primary IMF is London Dispersion Forces Acetic acid, it ionizes into ions when added to

Have a region surrounding the central area called

1. Simplify. | A. O 16 B. O C. 04 D. O

What is the (H+), if the pH of a solution is 3.20?