Recent content by GLprincess02

Homework Statement Ethanol boils at a temp. of 78.29 degrees C. What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 23 g sample of ethanol initially at 12 degrees C? Homework Equations q=mass x constant x change in temp ? The Attempt at...

Well the only reason why I put #1 as D. was because I saw sodium acetate under examples of supersaturated solutions in my Chem book. And #3 I was sort of just guessing on. But I see now that 1 is C. and 3 is D. So I got it!

Homework Statement Match the items to the statements below. A Dilute B Unsaturated C Saturated D Supersaturated 1. Sodium acetate solution after the excess solute fell out of solution. 2. There is visible solute on the bottom of the container. 3. The solution will...

Never mind, I got the right answer. Thanks for the help. :)

So I take 0.2539 and multiply it by 2/3 first, right?

Ok, so how do I use this ratio in relation to the 0.2539 moles of aluminum nitrate? I guess I still don't really get all of the steps.

What is the mole fraction? Like, 2 moles of aluminum nitrate to 3 moles of magnesium nitrate?

Ok so I converted the grams of aluminum nitrate into moles and got approx. 0.2539 moles. I'm still confused about what to do next, though.

Homework Statement Given the balanced equation 2Al(NO3)3 + 3Mg ==> 3Mg(NO3)2 + 2Al , if 54.1 g of aluminum nitrate is reacted, what mass of magnesium nitrate is produced? 2. The attempt at a solution I've been given an entire packet dedicated to stoichiometry, but nothing in here covers...

You're right, I just realized my mistake. It should have said "-\frac{\sqrt{3}}{2}."

How can I go about finding the exact values of tan 510, sin (-315) and sin 750? I'm unsure of where to even begin on these problems and any help would be greatly appreciated. Never mind, I found the answers to these problems. However, there is another problem on my homework the reads: "Find...

On my homework is says "On the Beaufort scale of wind force, the term "fresh gale" describes wind speeds from 39 mi/hr to 46 mi/hr. Write a compund inequality to describe "fresh gale" wind speeds." Would an acceptable inequality be {S: 39 < S < 46} ?

Ohhhh ok it all makes sense now. Thank you very much for all your help.

Ok that makes sense. But one more thing...how can you determine whether to subtract the 2nd equation from the 1st, or add them both together?

So then it would be 9? Because it would then be 0 = 4, and that would make it inconsistent?