# Posts by fatma

Total # Posts: 20

**organic chemistry**

I think it is a benzoic acid but it is impure

*March 16, 2017*

**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)

*March 16, 2017*

**math**

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

*August 28, 2016*

**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

*April 4, 2016*

**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 :)

*April 4, 2016*

**math**

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

*June 30, 2015*

**math**

∑ (-1)^((n-1)) . 7/9^(n-1) n=1 to ∞

*June 30, 2015*

**math**

∑ (-3/4)^(n-1) n=1 to n=∞

*June 30, 2015*

**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 = ∞

*June 30, 2015*

**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 = ∞

*June 30, 2015*

**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 = ∞

*June 30, 2015*

**math**

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

*June 26, 2015*

**math**

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

*June 26, 2015*

**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) ...

*April 19, 2014*

**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 ;

*July 21, 2012*

**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

*July 7, 2012*

**Physics**

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

*June 18, 2012*

**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.

*September 20, 2011*

**math ALGEBRA**

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

*December 21, 2006*

**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

*November 4, 2006*

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