You want to use the Ideal gas Law for this problem since you have all the necessary information.
PV=nRT
Solve for n
PV/RT=n
plug in your information, remembering to use 0.08206 L·atm·mol−1·K−1 for R and to convert 29C to Kelvin.
Now you get how many moles of N you have.
12...

Scientific Notation is done by reducing the number that you have to a number between 1 and 10. Then you have that number multiplied by the proper factor of 10 to get your original number.
For instance,
1,030,000 to be written in scientific notation, you have to make it a number between...

Well, the answer is that there is no easy way to balance chemical equations. Some ways are easier than others but they all require some guesstimation. The best formula I've found to balance equations is to do the steps in the following order.
-Metals
-Non-metals
-Unchanged polyatomic...

First thing you do is take get everything on the opposite side of x. To do that, start by taking the parenthesis off first. Then take the (-7) and moving it over.
x/-4 + (-7) = (-16)
x/-4 - 7 = -16
x/-4 - 7 + 7 = -16 +7 Remember, whatever you do to one side, you have...