Posts by TS

Total # Posts: 34

College Chemistry
If the reaction rate increases by 2.6 when the temperature increases from 20-30 degrees Celsius, what is Ea? Do we use 2.6 in place of (k2/k1) or multiply something by 2.6? Lost, please help.

Chemistry
Rule of thumb gives the activation energy of most organic reactions as approximately 50 kJ/mol. Based on that, calculate by what factor the reaction rate increases when the temperature climbs from 25°C to 45°C. 1. 3.6 2. 3.2 x 1046 3. 1.001 4. 1.3

Chemistry
A sample of beer is 4.6 % by mass C2H5OH. The density of beer is 0.93 g/ml. What is the molar concentration of C2H5OH in this sample of beer? a. 9.7 x 10-4 b. 1.13 x 10-4 c. 0.975 M d. 1.13 M I did 0.046x930 g/L =42.78 mass alcohol 42.78/molar mass of C2H5OH (46.068) = 0.928 ...

math
what is the area of a square inscribed in a circle with apothum 3.5cm

Chem
HCl is slowly added to a solution that is .250 M in Pb^2+ and .00150 M in Ag+. Which precipitate forms first, PbCl2 or AGCl? At what Cl- ion concentration will the precipitate first appear? Ksp for PbCl2= 1.6*10^-5, Ksp for AgCl= 1.7*10^-10 Seriously don't understand Ksp ...

Chem
How many grams of silver sulfate can be dissolved in 450. ml of .200 M sodium sulfate solution? Ksp for Ag2SO4= 1.2*10^-5 Do not understand this solubility question. Please help.

Chem
Please help, struggling like crazy.

Chem
a) A weak acid, HX, is 1.3% ionized in .20 M solution. What percent of HX is ionized in a .030 M solution? b) Does the percent ionization increase or decrease upon dilution? c) Does the H3O+ concentration of the above weak acid increase or decrease?

History
and yes I did read it. I just don't know what to put for the before...

History
Okay so Im doing a compare & contrast essay on key events that changed the Unites States between 1776-1870 Of course im going to include the creation of the US Constitution. But, I'm having a hard time coming up with the "before & after" effect? What exactly ...

english
^ Ms. Sue is right btw

Accounting
Temporary investments A.are reported as current assets B.include cash equivalents C.do not include equity securities D.all of the above

Accounting
At the market close on February 19, 2010, McDonald's Corporation had a closing stock price of $64.74. In addition, McDonald's Corporation had a dividend per share of $2.05 over the previous year. Determine McDonald's Corporation's dividend yield. (Round to one ...

Accounting
What is the total stockholders' equity based on the following account balances? Common Stock $450,000 Paid-In Capital in Excess of Par 90,000 Retained Earnings 190,000 Treasury Stock 10,000 Answer A.$740,000 B.$730,000 C.$720,000 D.$640,000

Accounting
The financial loss that each stockholder in a corporation can incur is usually limited to the amount invested by the stockholder. Answer True False

Accounting
Samuels, Inc. reported net income for 2011 is $105,000. During 2011 the company had 5,000 shares of $100 par, 5% preferred stock and 20,000 of $5 par common stock outstanding. Samuels’ earnings per share for 2011 is Answer $4.00 $5.25 $6.50 $5.00

Physics
A sled is set in motion on a frozen lake. If friction and air resistance are neglible, how much force is required to keep the sled moving at a velocity of 12 m/s?

phySICS
PHYSICS when a positive charge moves under the influence of an electric field's electrostatice force, what happens to the electrical potential energy of that charge?

phYSICS
the process of charging a conductor by bringing it near another charged object and then grounding the conductor is called... a) charging by contact b) induction c) charging by polarization d) neutralization which one of the following statements is true concerning the madnitude...

unterstanding operating systems
Given that main memory is composed of three page frames for public use and that a seven-page program (with pages a,b,c,d,e,f,g) requests pages in the following order: a,b,a,c,d,a,e,f,g,c,b,g

social studies
what is the agriculture of egypt ?

social studies
what is the agriculture of Egypt

ss
what are the products, exports. and imports used for

ss
what are the 4 major industries in Egypt used for ??

6th grade
what are the 4 major industries in Egypt

social studies
what are the industries of Egypt ?

social studies
agriculture is food pharmasutical is medication

social studies
what are the product, exports, and imports used for

social studies
what are the products, exports, and imports used for in egypt

social studies
what are the product,exports, and imports of egypt used for

social studies
what are the products, Imports & Exports in Egypt

social studies
what is the natural resoueces of egypt

science
If te earth did not turn how would the pattern of tides be affected

Math
1. 37 2.74