The Official Homework Help Thread!

[le youth]

I can help people whenever during 2nd semester aka Feb-June. 
These are the subjects I can help with: Chemistry, Biology (Bozeman Science will probably be more helpful than me tbh), environmental science, all levels of math up to calculus, English, neuro, apush, micro/macroeconomics (not an expert), and maybe Spanish too (not a native speaker) lel.

Honestly though, Google is your best friend   
If I need help with Spanish Lit. at like 2am, I'll come here I guess 

Edited August 24, 2015 by ImSoBored

[le youth]

please find the mean, median, and mode of this data set: 30, 37, 32, 39, 33, 34, 32

don't judge me

 

also how do u find mean again? my teacher went through the notes to fast for me to finish writing.

to find the mean -> just find the average of the set of data aka add all the numbers and divide by the # of values (7)

median -> order the numbers from least to greatest (30, 32, 32, 33, 34, 37, 39) and the value in the middle is is the median. if there are two numbers in the middle, then you find the avg. of those numbers, but with your case only one number is in the middle.

mode -> the value that appears the most often in the data set

 

[le youth]

anyone know how to use webassign.net? I can't seem to enter answers like 5.00 âœ• 10⁸ for example.

I used webassign last year and i think instead of x 10^8, you use the 'e' notation so it would be 5.0e8

 

 

 

 

hi Im a chemistry flop, please help

The relative molecular mass, Mr, of copper(II) sulphate, CuSO4, is 160.

The relative molecular mass, Mr, of water is 18.

What is the percentage by mass of water in copper(II) sulphate crystals, CuSO4.5H2O?

 

1. Find the total mass of the copper(II) sulphate crystals. So, add 160 and 5*18, since there are 5 water molecules in the compound. -> 250

2. Then find the mass of water in the compound. 5 water molecules = 5*18 = 90

3. Mass of water/total mass of compound *100