Combustion analysis of a hydrocarbon produces 33.01 g co2 and 13.51 g h2o. calculate the empirical formula of the hydrocarbon.

Read the list of elements given below. F, Cl, Br, I. Which of the following about the elements is true?

You can still go to work, although you should not work with food or in food preparation areas, if you have which of the following illnesses?

Which group of elements on the periodic table forms covalent compounds with other nonmetals

Suppose that you have made a saturated solution of this solute using 56.0 g of water at 20.0 °c. how much more solute can you add if the temperature is increased to 30.0 °c?

What part of the human body is the nucleus similar to

Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid. CO2 + H2O - --> H2CO3

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)