The element oxygen, represented by the symbol O, is classified as

A. a compound.

B. a mixture.

c. a pure substance.

D.

a solution.

What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution? 2nh3 (aq) + h2so4 (aq) →?

Witch type of crust is thick and contains granite

As a quality control check, a sample of acetone is taken from a process to determine the concentration of suspended particulate matter. An 850 mL sample was placed in a beaker and evaporated.

A laboratory technician wants to determine the aspirin content of a headache pill by acid-base titration. Aspirin has a Ka of 3.0 x 10-4. If the pill is dissolved in water to give a solution about 0.

How many neutrons are probably in the nucleus of an element of atomic weight 197? a. 43 b. 79 c. 83 d. 100 e. 118

What is a converging lens

What type of reaction is 2 NO2 - --> 2 O2 + N2

The main source of phosphorous is in: rocks water plants the atmosphe

To what part of a plant does the stem sliver water and nutrients

You place a balloon in a closed chamber at STP. When the balloon doubles in size, what happens to the chamber pressure? A.) The pressure stays the same B.) The pressure doubles C.) The pressure reduced by one half