AzizHusain

Only if it is in fraction form...p^20 / p^-8 = p^12...you can subtract exponents to get 12.

But, p^20 + p^-8 does not equal p^12...Suppose p = 2...try it out with the calculator.

As a general rule, make sure the exponents are the same: x^3 + x^3 = 2x^3, but you cannot apply this to x^3 + x^5.

I believe you meant 88.1 grams and not moles. To solve this, you would simply need to divide the grams by the molar mass of Magnesium which can be found on any periodic table. Note that molar mass is in grams/mol so grams will cancel out leaving you with mol. For instance, Oxygen has a molar mass of 16 grams/mol, but O₂ has a molar mass of 32 grams/mol since you have a molecule containing 2 O's.

Hi, Rosala! Thanks! Glad to see you and everyone else again, too! 

As always, lots of comical images! The education one stood out to me...reminds me of the education system here...it really does need modification...

The last image reminds me of women and STEM (science, tech, engineering, math). That is a powerful quote!!!

Thanks again!!

This requires stoichiometry.

Find the molar mass (g/mol) of Magnesium and Magnesium Oxide by using the periodic table.

Then, simply use dimensional analysis to solve for mass of MgO.

Start with the given information and convert from there. Also, note the mole ratio is 2:2 or 1:1.

0.52g * (mol / # g Mg) * (2 mol MgO / 2 mol O) * ( # g MgO / mol) = ?

Thanks DS and Chris! 

I am doing alright. Just lots of things happening these days and yes, it is good...the usual. Right now, no grades yet since it just started. I'm glad to be back as well. Will visit from time to time!

However, the weather is crazy here...it is in the 90s (Fahrenheit) in October! I am going crazy.

You can just copy the information by highlighting the numbers and right-clicking to "copy" (or ctrl+c) and then paste by right-clicking and then "paste" (or ctrl+v) when you need that information again.

What questions?

We cannot do this computation.

Edit: Geno got it! I thought too hard about it.

They are unique shapes that arise as a result of patterns.

25y^4 - 4x^4

Note that we can see this in the format a^2 - b^2

a^2 = 25y^4 --> a = sqrt(25y^4) = 5y^2

b^2 = 4x^4 --> b = sqrt(4x^4) = 2x^2

(5y^2 + 2x^2)(5y^2 - 2x^2).

Proteins, lipids, nucleic acids, and sachharides. 

700^(0.128) = 2.3129835769169597. Use the calculator on the home page.

9(2 1/3) as in 9*(2*1 / 3)?

If so, 9*(2/3) = 9*2 / 3 = 18 / 3 = 6.

I wonder how we would go from micrometers to milligrams...