Imagine that Mendeleev's model never existed. What challenges would come about as a result?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Find the mass in grams of 1.37x1020 particles of h3po4

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?