Recent content by gurpalc

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    Standard change of enthelpy, hess's law question

    Homework Statement http://imgur.com/lb0HL Homework Equations in pic The Attempt at a Solution So I multiplied the H2 + 1/2O2 equation by 3 and added it to the (N2H4, 2NH3) equation. I got H2O to match up and O2 to match up, but I don't know how to manipulate the other...
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    A monkey falls from a tree problem

    is the answer 33.725 m/s. I used -1.2 meters for displacement because the question wanted minimum velocity and that meant when the monkey hit the ground, the dart would hit him, right? And from the diagram, we see the gun is 1.2 meters above ground by 11.2-10. Is this right?
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    A monkey falls from a tree problem

    what do h and y have to do with the question
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    A monkey falls from a tree problem

    ok i got the time. but i don't know how to find vertical velocity because i don't know what to use for displacement of dart.
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    A monkey falls from a tree problem

    also what should my displacement be. should i use -10-0 or something to do with y. I am confused on that part
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    A monkey falls from a tree problem

    ok thanks
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    A monkey falls from a tree problem

    I don't know how to get the time
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    A monkey falls from a tree problem

    Homework Statement http://imgur.com/YEVAL Homework Equations x= x.initial + v.initial(t) + .5(a)t^2 v= v.initial + at v^2= v.initial^2 + 2ad The Attempt at a Solution I tried plugging into above formulas but there were too many unknowns. I'm not sure what I'm missing...
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    Don't know how to do this stoichiometric problem with 4 questions.

    Homework Statement attached http://imgur.com/CiUX9 Homework Equations n/a The Attempt at a Solution I got the first 3 answers. But I don't know what this is asking for. What is CuO. Where did that come from. Is \n't it supposed to be Cu(OH)2?
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    How to tell which function has distance proportional to time?

    Thanks everyone for the replies. I got it now.
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    How to tell which function has distance proportional to time?

    Homework Statement http://imgur.com/aYCc9 also in attachment Homework Equations n/a The Attempt at a Solution I'm not sure how to tell when distance is proportional to time. My guess is it would be graphs a and b because they're both straight lines and when time increases...
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    Calculating Molarity & Volume of Cu(NO3)2

    Yes but I don't get it.
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    Calculating Molarity & Volume of Cu(NO3)2

    How do I find final volume of Cu(NO3)2. That's what I'm stuck on. I don't know how to make the calculations.
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    Calculating Molarity & Volume of Cu(NO3)2

    Homework Statement My problem is in the attachment. I am trying to find the molarity and volume of Cu(NO3)2 while I only know Cu has .50 g and HNO3 is 10M and is 5mL. Homework Equations The Attempt at a Solution I have done my calculations on the right. What I have circled is...
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    How to determine # of solutions to sqroot of x+5=x?

    Homework Statement How many real solutions does the equation √x+5=x have? Homework Equations n/a The Attempt at a Solution I squared both sides so I got x+5=x^2 then I formed a quadratic equation: x^2-x-5=0 I got two real solutions but the answer is one. I know it has...