Astock solution contains a mixture of ~100 ppm chloride, fluoride, nitrite, bromide, nitrate and phosphate anions. in order to prepare 1 l of 100 ppm nitrite stock solution, you weigh out 150.0 mg of nano2. the actual concentration of nitrite would be:

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Which fact represents evidence for the big bang theory?