Find the empirical formula of a compound that contains 42g of nitrogen and 9g of hydrogen.

The molar mass of the common antibiotic oxytetracycline is found to be 460 g mol-1 and a 2.000 g sample contains 1.1478 g of carbon, 0.10435 g of h, 0.62609 g of oxygen and the remainder being nitrogen.

Which statement supports the claim that the continental crust was once joined together as one supercontinent, Pangaea?

What is it called when a gas is converted into a liquid

What mass, in grams, of aluminum hydroxide will be required to prepare the 4 L of a 1.75 M solution?

A person has a height of 65 inches You want to find out the height of that person in centimeters. Which unit conversion would you use?

Which phase of matter has a fixed volume but variable shape

Given 10.8 grams of substance Y, if the substance absorbs 231 kilojoules of energy and the specific heat of the substance is 6.55 J/g·°C, what is the change in temperature?

Which sphere includes rocks and minerals? A. atmosphere B. biosphere C. geosphere D. hydrosphere

What defines a material as being a mixture?

What do igneous rocks form from? (20pts!)