Which of the following was originally a tenet of dalton's atomic theory, but had to be revised about a century ago?
atoms are tiny indivisible particles.
the atoms of any one element are different from those of any other element.
compounds are made by combining atoms.
atoms of different elements can combine with one another in simple whole number ratios.

What is the molar mass of ca(cio4)2

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?

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?