The combustion of 5.00 grams of c2h6 (g), at constant pressure releases 259 kj of heat. what is δh for the reaction: 2c2h6 (g) + 7o2 (g) = > 4co2 (g) + 6h2o (l) ?

An atom's tendency is to become stable. What does this mean? A. The electrons all move to one electron shell. B. The atom gains or loses neutrons to match the number of protons. C. The atom gains or loses electrons to match the number of protons. D.

A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be

Which of the following would decrease current flow in a circuit made originally from a 1.5 volt battery, a loop of wire and a switch? A. original battery, thicker wire B. original battery, thinner wire C. 3V battery, thicker wire D.

Homes can be heated using combustion of different materials. True or False

8 Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their (1) atomic numbers (2) crystal structures (3) isotopic abundances (4) percent compositions

Which is a product of the electrolysis of water containing a low concentration of kno3?

Where are alkaline earth metals found on the periodic table

IKI will turn deep purple in the presence of starch. Which term is applied to IKI in this situation? A. indicator B. litmus C. modifier D. product

How many electrons are in the 2p sublevel of nitrogen?

Which answer choice correctly lists the elements found in Period 2 of the periodic table? A. oxygen, fluorine, neon B. sodium, magnesium, aluminum C. nitrogen, phosphorus, arsenic D. beryllium, magnesium, calcium