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Posts by fatma

Total # Posts: 20

organic chemistry
I think it is a benzoic acid but it is impure

organic chemistry
2. An unknown white solid has melting point range 119 – 121o C. Benzoic acid is a white solid of 122 o C melting point. How can a student confirm the identity of the unknown solid (is the benzoic acid or not)

math
A product of a two digit number is24 when the number is reverse exceed the original number by 27 find the number

math
Divide the following by both long division and synthetic division a). x^3 + x^2 - 2x + 4 by x-2 b). x^5 + 4x^4 + x^3 - x^2 + 2x - 7

Algebra
c^2 = a^2 + b^2 = 12^2 + 5^2 = 144 + 25 = 169 , then square root this number to give =13 ft. the length of the ladder :)

math
Sum[(-1)^(n - 1) (7/9^(n - 1)), {n, 1, Infinity}]

math
∑ (-1)^((n-1)) . 7/9^(n-1) n=1 to ∞

math
∑ (-3/4)^(n-1) n=1 to n=∞

math
Write out the first five term of the sequence determi whether the sequence converges and if so find its limit (n/(n+3) n=1 to n = ∞

math
Write out the first five term of the sequence determi whether the sequence converges and if so find its limit ( n^2)/(4n+1) n= 1 to n = ∞

math
Write out the first five term of the sequence determi whether the sequence converges and if so find its limit (n/(n+3) n=1 to n = ∞

math
Find the area between x=-y and x=2-y^2

math
Find the exact arc length x=1/3(y^2 +2)^3/2 from y= 0 to y = 1

calculus
Let f x   coth x . Use the Graph software posted in Moodle to do the following: (a) Graph f x  . (b) Graph the tangent and normal lines to the graph of f x  at x 1. (c) Graph f x  . (d) ...

Physica
If a student desires to produce three times larger and an erect image from a double convex lens with focal length of 15 cm ,then he should place the object from the lens at ;

physics
1\ Acar is moving with acceleration 200 m in 50 sec reached to velocity 10 m\sec .what the total distance the car moved in 60 sec

Physics
Amotorcycle slowed down to rest from avelocity of 10m\sec whiletraveling 30m what is its average acceleration

english
Change the sentences,replacing the phrase people who are..with an adjective used as an noun. 1-People who are uneducated have a hard time catching up.

math ALGEBRA
T=5 u=6 5 + 6=11 65_56=9 Answer =56

acids and alkalis
please tell me how many alkalias are there please i need it fo tomorrow or else i will get detention plzplz i love you and marry you if u tell me da answer plz i beg u reply back plz

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