Thursday
June 20, 2013

# Posts by Lydia

Total # Posts: 148

chemistry
Why if you dissolve cobalt chloride solution in distilled water and then pour acetone in it, the bottom part of the graduated cylinder is red and the top part is blue? What do you mean by it has one color with water of crystallization? CoCl2*6H2O is a purple solid. I'm tol...

chem
How does molar mass affect the boiling point of covalent substances? The general rule is that heavier molecules boil at a higher temperature. thanks

algebra
What is the difference between y=sqrtx +3 and y=2sqrtx +3 (I put spaces between x and the + to show that only the x is a squareroot) And what is the difference between y=2sqrtx +3 and y=sqrt2x+3 When I mean the difference, I mean how they would look differently when graphed. T...

chem
In Fe(NO3)3, how many Fe atoms are there? One, three N, and 9 O. thank you

algebra
Can someone please help me with this problem? 4x-1 ---- 2x^2+3 Can you simplify this any further? no, its done thanks

algebra
Can someone please help me with this one? Solve (5x+4)^1/2-3x=0 Just so you know, it is to the 1/2 power. Add 3x to both sides of the equation, then square both sides. That should enable you to gather terms and factor. Yeah, that's the part I understood. Could you help me ...

chemistry
Can someone help me finish this equation, please? We're adding Magnesium to Copper sulfate and getting Copper. This is what I have as of now: CuSO4+Mg===>Cu I'm guessing it is a single replacement, so should I add MgSO4 to the right? But then my lab procedure says t...

chem
oh thanks If you have CH4, does the 4 apply to both the C and H or only to the H? It is the H that is four. only the H