How many neutrons does bromine have?

a. 10

b. 35

c. 45

d. 80

Which beat describes heat

A piece of charcoal is found to contain 30% of the carbon 14 that it originally had. when did the tree die from which the charcoal came? use 5600 years as the half-life of carbon 14. A (t) = Aoe^kt k<0

Suppose a 250.0 mL flask is filled with 1.3mol of I2 and 1.0mol of HI. The following reaction becomes possible: H2 (g) + I2 (g) = 2HI (g) The equilibrium constant K for this reaction is 0.983 at the temperature of the flask.

How to balance an unbalanced equation

Increasing the concentration of a reactant shifts the position of a chemical equilibrium towards formation of more products.

Name 4 common chemical properties of matter

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).