Thursday

July 30, 2015

July 30, 2015

Total # Posts: 37

**biology**

1. Which bond will comes apart in water? answer: ionic
*September 15, 2010*

**Biology**

Hydrogen= 1 proton, 0 Neutrons, 1 Electrons and 1 electrons in outer shell. is correct!
*September 10, 2010*

**math**

would you tell me please are they correct?
*August 4, 2010*

**math**

Multiplying and Dividing Rational Expressions: 1. 2x^4/x^5 times 6x/x^3 times x/4= 3/x^2
*August 4, 2010*

**math**

are they correct?
*August 4, 2010*

**math**

Multiplying and Dividing Rational Expressions: 2) x^2-8x+7/x^2+6x-7 = (x-7)/(x+7) 3) x^2-5x+6/x+4 times 3x+12/x-2 =3(x-3) 4)2x-3/5x+1 divided by 6x^2-13x+6/15x^2-7x-2=1 5) x^3-9x/x^2+11x+24 times x^2+7x-8/x^2-4x+3= x(x-3)(x-1)/(x+3)(x+8) 6) 4x-8/x^2-x-6 divided by x^3 +x^2-6x/...
*August 4, 2010*

**math**

Multiplying and Dividing Rational Expressions: 2) x^2-8x+7/x^2+6x-7 = (x-7)/(x+7) 3) x^2-5x+6/x+4 times 3x+12/x-2 =3(x-3) 4)2x-3/5x+1 divided by 6x^2-13x+6/15x^2-7x-2=1 5) x^3-9x/x^2+11x+24 times x^2+7x-8/x^2-4x+3= x(x-3)(x-1)/(x+3)(x+8) 6) 4x-8/x^2-x-6 divided by x^3 +x^2-6x/...
*August 3, 2010*

**math**

Multiplying and Dividing Rational Expressions: 1. 2x^4/x^5 times 6x/x^3 times x/4= 3/x^2
*August 3, 2010*

**math**

Radical Equation: Solve for x. 2x+6=1+2x-1
*August 1, 2010*

**math**

solve for X ? 1) 8-3x < 14 -3x/-3 < 6/-3 x=-2 2) 7x -3 > 4x +3 3x -3> 3 3x/3 >6/3 x>2 3) x-5<3 and 2x > -8 x<8 x>-4 4) x+ 7 <3 or 5x > 30 x<-4 x> 6 are they correct..
*July 15, 2010*

**math**

is 9x^2-36x+25 a perfect square? the answer is no
*July 14, 2010*

**math**

2(x+4)^3(3x-15)^4=0 solve for x. is the answer 3,4
*July 13, 2010*

**math**

Find the degree of 7u^4v^2w^5 is the answer 11
*July 13, 2010*

**math**

find the degree of 2x^5y^3+6x^2y^7 is the answer 14
*July 13, 2010*

**math**

is the answer 14
*July 12, 2010*

**math**

how can i find the degree of 2x^5y^3+6x^2y^7
*July 12, 2010*

**math**

is the answer 11
*July 12, 2010*

**math**

Find the degree of 7u^4v^2w^5
*July 12, 2010*

**chemistry**

How much 0.150 M sodium hydroxide would be required to just neutralize 15 mL of 0.175M hydrochloric acid? 15mL x 0.150M/0.175M=12mL correct!
*June 29, 2010*

**chemistry**

why is unecessary to measure precisely 25.00mL of unknown acid into the beaker?
*June 29, 2010*

**chemistry**

a graduated cylinder weights 64.376g empty.when i measure 30.0mL into it weights 89.98g.what is the density of the liquid? 64.376g-89.98g=25.604g then i 25.604/30.0=.853
*June 29, 2010*

**chemistry**

Why are optical isomers not found for CH2ClBr?
*June 29, 2010*

**chemistry**

Why are optical isomers not found for CH2ClBr?
*June 29, 2010*

**chemistry**

Why are cis and trans isomers not possible for ClCH2CH2Cl? Because it is a single bonded compound and cis-trans isomerism is only possible when fre rotation about a bond is restricted or a double bond or cycle is essential for existence of cis-trans isomers.
*June 29, 2010*

**chemistry**

butane CH3-CH2-CH2-CH3 iso butane CH3-CH(CH3)-CH3
*June 29, 2010*

**chemistry**

why is C4H10 the simplest alkene that can have structural isomers? Because compounds wwith the same molecular formula but different structural formula are called isomers in C4H10
*June 29, 2010*

**chemistry**

would you please tell me the calculation....please
*June 28, 2010*

**chemistry**

is the answer for this one 7.22
*June 28, 2010*

**chemistry**

A volatile liquid was allowed to evorate in a 43.298g flask that has a total volume of 252mL.the temperature of the water bath was 100 celsius at the atmospheric pressure of 776 torr.the mask of the flask and condensed vapor was 44.173g.calculate the molar mass of the liquid. ...
*June 28, 2010*

**chemistry**

calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0-L container at 27 celcius?
*June 27, 2010*

**chemistry**

calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0-L container at 27 celcius?
*June 27, 2010*

**chemistry**

calculate the densities of each of the following gases in g/L at STP: a. F2 b. CH4 c. Ne d. SO2
*June 27, 2010*

**chemistry**

use the molar volume of a gas to solve the following at STP: a. the number of moles of O2 in 44.8 L O2 gas. b. the number of moles of CO2 in 4.00L CO2 gas. c. the volume(L) of 6.40g O2. d. the volume(mL) occupied by 50.0g neon.
*June 27, 2010*

**chemistry**

a sample containing 1.50 mol neon gas has a volume of 8.00L.what is the new volume of the gas in liters when the following changes occur in the quantity of the gas at constant pressure and temperature? a.a leak allows on-half of the neon atoms to escape. b. a sample of 25.0g ...
*June 27, 2010*

**chemistry**

a sample of helium gas has a volume of 6.50L at a pressure of 845mm Hg and a temperature of 25 celcius.what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to the following: a. 1850 mL and 325K
*June 27, 2010*

**chemistry**

solve for the new pressure when each of the following temperature changes occurs, with n and V constant: b. an aerosol can has a pressure of 1.40 atm at 12 celcius.what is the final pressure in the aerosol can if it is used in a room where the temperature is 35 celcius?
*June 27, 2010*

**chemistry**

11.31) solve for the new pressure when each of the following temperature changes occurs, with n and V constant: a. a gas sample has a pressure of 1200 torr at 155 celcius. what is the final pressure of the gas after the temperature has droped to 0 celcius? 1200 x12 celcius/0 ...
*June 27, 2010*

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