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Questions (124)
One purpose of adding KIO4 is to prevent the permanganate ion from being slowly reduced to Mn+2 by H2O. Write a balanced redox
1 answer
617 views
There is a large [Cr2O7]-2 absorbance observed at 360 nm. Why can this wavelength not be used instead of the smaller absorbance
1 answer
461 views
0.281g of Fe(NH4)2(SO4)2*6H2O is dissolved in a total volume of 500.0 mL of water, calculate the resulting Fe concentration in
1 answer
1,670 views
10. Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.8 inches
1 answer
558 views
lim (2x^2+3x-2)/ (2x-1)
the lim is x->1/2 [ans:5/2 but i get 3/2) can someone show me the calculation work.
1 answer
507 views
lim (7-6x^5)/(x+3)....
the lim is x->+infinity [ans=-infinity but i get 0] can someone show me the calculation work.
1 answer
533 views
f'(x).... y=(e^x-e^-x)/(e^x+e^-x). I need the calculation work.
[ans: 4/(e^x+e^-x)^2]
2 answers
323 views
a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &SCl2. Find the mass of S2Cl2 formed.
1 answer
641 views
how do you do taking away fractions like for eg 2 1/5 take away 1/10
1 answer
387 views
a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal
0 answers
897 views
a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal
0 answers
1,211 views
write a quadratic equation in the variable x having given the numbers as sollutions type the equation in standard form
1 answer
510 views
I need to find out which structure is more correct:
Reaction of the compound C3H8O with CrO3 (oxidizing agent) yields acetone.
1 answer
868 views
provide me with a radical expression to simplify
1 answer
402 views
Mike would like to plant some trees so he needs to use a portion of his existing yard. The perimeter of this rectangular portion
1 answer
580 views
x+1 - x+2 = ?
--- --- 2x-8 12-3x
1 answer
309 views
devise memory aids for any five terms relating to the musculoskeletal system
6 answers
549 views
Potassium perchlorate has a lattice energy of -599 kj/mol and a heat of hydration of -548 kj/mol.
Find the heat of solution for
1 answer
3,148 views
i can't figure out how to do this problem:
3(y-4)=-2y-12
1 answer
329 views
If you are finding the volume of a cylinder, but the cylinder has a base instead of a diameter or radius... what would you do?
0 answers
454 views
hi im doing my assignment in child care level 3 and i need to answer this question ,(describe ways that parents may participate
2 answers
541 views
General question- when do you use NEGATIVE for 9.8m/s^2?
Even when the questions says "an object is thrown up in the air from top
2 answers
451 views
where do living cells come from?
0 answers
337 views
what happens when a candle is alight?
2 answers
483 views
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