Which of the following materials is a substance, silver, air, gasoline or staintless steel?

What do Potassium and Krypton have in common and what are their differences based on their location on the periodic table?

Formula: C8H9O2N Which element is present in the the greatest proportions by number of particles?

A sample of nitrogen gas occupies 5.50 liters under a pressure of 900 mm Hg at 25⁰C. At what temperature will this sample occupy 10.0 liters at the same pressure?

What are 5 ways to tell if it's a chemical change

What was noticed about the shape of coastlines by sailors as early as the sixteenth century? The West coastline of Africa and East coastline of Australia looked like they fit together The East coastline of South America and West coastline of Africa

What term is used to describe a testable modle

When the equation for the combustion of ethane, C2H6, is correctly balanced, the coefficient on oxygen is:

Sahil watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. the ending substances did not look the same as the starting substances.

How many molecules of H2S are required to form 79.0 g of sulfur

How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution