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So how can I find the gram of CuSO4*5H2O ? Do I combine all the atomic mass or multiply?

I don't really understand the question.

"A student heats 100.0g of copper(II)sulfate pentahydrate and obtains 58.2g of anhydrous copper(II) sulfate. What percent yield was obtained in this...

Oh yeahhh
I totally forget that!
Thanks a lot!! ;)

I got .692mole of Zn that is needed but I don't know how to continue working. Which equation should I use?:)

I'm so confused with the equation. But I got 15.3L as an answer.I don't know if it's correct.

"How much Zinc must react in order to form 15.5L of hydrogen, H2 (g),at 32.0c and 115 kPa"?
...

OHHH I SEE!!
Thank you so much for helping me out!
I got it!! YEAH :]
Thanks again!

Not really! :(
I'm still confused with what the two investments are going to be.
I don't know how to figure it out.

Okay... thank you so much!

Thank you so much!! I'm not really sure how to find which one's a prime number. But I try to divide the number ,if there are only itself and 1 that are the factors. I just say that it's a prime...

I really have no idea what to do with this question. So I hope you could help me.

"the product of five prime positive integers is a six-digit number, where all of the digits are the same. Find the...

I can't figure out what I should do to solve this question. So I think someone could help me! :)


"A man invests some money at 8 percent interest and twice as much at 6 percent. If the total...