Saturday
December 7, 2013

# Posts by amir

Total # Posts: 96

Math
how do i know if the tangent is positive in the third quadrant?

Math
solve 4 sin x = cos x for 0<X<360

Math
thanks man

Math
g(x) = 3x+5 / x-1 find the inverse function

Chemistry
You need to prepare 2 M solutions, with 10 g of solute. What volume of solution will you prepare for ammonium nitrate, NH4NO3?

IGCSE Chemistry
Thanks

IGCSE Chemistry
Hydrocarbons A and B both contain 85.7 % carbon. Their molar masses are 42 and 84 respectively. a) Which elements does a hydrocarbon contain? b) Calculate the empirical formula of A and of B. c) Calculate the molecular formula of A and B. I solved a) and b) the solutions are a...

Chemistry
i think it only has two bond angles that are 120 and 180 only

Math
A man and his wife share a sum of money in the ratio 3:2. If the sum of money is doubled, then in what ratio should they divide it so that the man still receives the same amount?

Chemistry
K2= +1 Cr=+6 o=-2

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