# Posts by amir

Total # Posts: 106

**science**

thank you!!

**science**

is the density of a metal (like aluminum) the same no matter what the size of aluminum?

**algebra**

4n-2n = 2n 2n=18 divide both sides by 2 to isolate the n n=9

**Math**

assuming you can use the numbers more than once.... 24/2 = 12 12*12 = 144 144/2 = 72 72-24 = 48 48-24=24

**math**

-7 1/8 + 4 3/4 -7 1/8 + 4 6/8 -6 9/8 + 4 6/8 now subtract -2 3/8 - bud is correct.

**chemistry**

Hi. I'm not sure if my strategy for this problem is correct: How many grams of CaCO3 will dissolve in 3.0x10^-2 mL of 0.050M Ca(NO3)2? I think I'm supposed to convert molarity of Ca(NO3)2 into moles, but then i don't know how to get from mols of that to mols of ...