Answer the question below based on the periodic table entry for bromine.

How many neutrons does bromine have?

10

35

45

80

Using a molar heat of combustion of - 890 kJ/mol, The minimum mass of methane that must be burned to warm 5.64 kg of water from 21.5°C to 77.4°C, assuming no heat losses to the environment is ab. c g. Put your answer for ab. c in the blank.

How many elements are in 2CaCO3 and C8H10N402

Breaking which type of bond would require the most energy?

If you burn 46.0 g of hydrogen and produce 411 g of water, how much oxygen reacted?

Why would an element like chlorine prefer to exist as a diatomic molecule instead of as an atom?

Suppose 30 grams of NaCl are placed in 900 mL of water. What is the molarity of this solution?

After a particularly cold day outside you go home to make some tea. you heat the water in the mug so that botch are about 75 degrees celcious. the tea bag is only 30 degrees celcious and the room is around 26 degrees celcious.

For main-group elements using the older numbering system the group number on the periodic table corresponds to which characteristic of the elements of that group

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.

Which of the following solutions contains the largest total concentration of ions, assuming complete dissociation .010 M aluminum chloride .010M sodium chloride .010M aluminum sulfate .010M calcium chloride