What are state symbols in a chemical equation apex?

What is the basic difference between primary and secondary succession? a. the presence of water b. the presence of air c. the presence of soil d. the presence of trees

Calculate the mass of CO2 produced by the combustion of a tank of gasoline. Assume the mass of gasoline is 46.0 kg and that gasoline is pure octane (C8H18).

Is carbon monoxide a pure substance or a mixture?

In chemistry class, you are given a density column with golden syrup, water, and oil. Your teacher gives you an unknown substance. The unknown substance is a solid, and it has been determined that the density of the unknown is 7.50 g/cm3.

Based on silicon's position on the periodic table, it has A. 14 electrons, which include 4 valence electrons in the third energy level and 10 electrons distributed over the first two energy levels. B.

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

Which term refers to an electrochemical cell that produces an electric current? A) electrolyte B) voltaic cell C) electrolytic cell D) cathode

How can you determine the valence electrons in an electron configuration?