The half life of a radioactive element is 2 million years. a mass of rock originally contained 200g of this element. how many grams of the element are left after 4 million years?

The combination of sulfur dioxide, nitrogen oxide, and atmospheric moisture creates

How many moles of chromium are present in 13.7 grams of chromium metal? Give your answer to 3 decimal

Which element is likely to be the most brittle? selenium cobalt platinum zinc

Which are homogenous mixtures? Check all that apply. Vinegar Trail mix Orange juice with pulp Sugar water Sand Soda pop in a sealed bottle

A piece of glass is immersed in a liquid. it proceeds to float on the liquid's surface. this shows that the density of the glass is? the density of the liquid?

A flask contains 4.4g of carbon dioxide gas. calculate how many moles CO2 gas does it contains?

What defines a mixture? A) A mixture contains different substances that are chemically combined. B) A mixture contains different substances that are not chemically combined and can be broken down into its basic substances through physical means.

How much does 5 gallons of water weigh?

Calculate the percent by mass sulfur in sulfuric acid, h2so4.

4. What electrons are involved in chemical bonding?