A sample has a mass of 15 g and a volume of 3 mL calculate the density

What can scientists determine by examining 1,000 year-old pollen trapped in the ground? A. The amount of plants still alive with the same type of pollen. B. What caused you the death of the plants and animals in an area. C.

Bromine is a red-orange liquid with an average atomic mass of 79.90 amu. Its name is derived from the Greek word bromos, which means stench. It has two naturally occurring isotopes: Br-79 (78.92 amu) and Br-81 (80.92 amu).

Describe at least two air pollutants that destroy the ozone layer. discuss the origination of these pollutants and a plan for reduction

Is the night sky divided into contellations? Is a light-Year is a measurement of time?

Which activity is the best demonstration of J. J. Thomson's use of creativity in his work?

At what temperature would the volume of a gas be 0.550 L if it had a volume of 0.432 L at - 20.0 o C?

A sample of a compound contains 9.11 g Ni and 5.89 g F. What is the empirical formula of this compound? A.) NiF B.) Ni3F2 C.) NiF2

Combining aqueous solutions of bai2 and na2so4 affords a precipitate of baso4. Which ions are spectator ions in the reaction?

Which kind of wave increases in height due to strong winds?

Solid lead IV oxide decomposes into solid lead and oxygen gas.