Calculate the volume of carbon dioxide produced when 250 g of pentane, C3H12, burn. Assume the carbon dioxide is cooled to STP.

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

What’s the percent by mass of carbon in c10h14n2

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?