Tuesday

March 31, 2015

March 31, 2015

Total # Posts: 26

**Chemistry **

In the reaction between bromine and sodium, a bromine atom gains an electron. What ion is formed? Is the bromine oxidized, or is it reduced?
*December 5, 2014*

**look adverb and verbs**

The farmers need to water them every day is this correct answer water every day
*October 15, 2014*

**english**

what is a concrete noun
*March 11, 2014*

**S.S**

How do I write a one page essay on 'If I were a settler, where would I settle and what would my surroundings be?'
*September 13, 2012*

**Accounting**

The annual interest rate for a customer’s loan of $675 is 19.25%. What is the total dollar amount to be repaid on the loan, including principle and interest, for the entire year?
*May 31, 2012*

**Calculus**

Write a slope field for the differential equation. Corporate administrators notice that 13% of their employees retire each year, while 2,500 are newly hired. What is the long term effect if they initially have 30,000 employees?
*April 1, 2012*

**Math**

A shopkeeper packages together two types of hard candy: peppermint and cinnamon. Seperately the peppermint candy sell for $1.80/kg and the cinnamon candy sells for $2.40/kg. The mixture sells for $2.16/kg. Determine the amount of each type of candy that is required to make ...
*January 13, 2012*

**math word problem**

A rectangular bathtub with a base of 18 ft^2 is filling with water at a rate of ..7ft^3 per minute. How fast is the water level rising after 3 minutes?
*October 21, 2010*

**pre calc - polynomials & factoring**

perform the opertaion and write the result in standard form... (2x^2 + 1) - (x^2 - 2x + 1)
*September 15, 2010*

**heat of solution**

the heat formation of NH3 is -11.04 Kcal/mole. HOW would you calculate the heat of formation of NH3 in Kj/mole?
*June 2, 2010*

**molar heat**

the molar heat of vaporization for water is 40.79 kJ/mol. How would you express this heat of vaporization in joules per gram.
*May 19, 2010*

**chemm**

A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NAN subscript 3 yielding 2NA + 3N subscript 2 the density of nitrogen gas is typically 1.16 g/L at room temperature. How would you calculate the...
*April 27, 2010*

**CHEM**

given the general chemical equation, A yields 3C + D , a. how many moles of C can be produced from one mole of A? b. how many moles of D can be produced from four moles of A?
*April 15, 2010*

**chem**

if the reaction type is Synthesis then what would be the product of.. Fe subscript 2 O subscript 3 + H subscript 2 O
*April 8, 2010*

**CHEM_**

if 16.5 of iron (II) sulfide contain 6.02 x 10^23 formula units, how many formula units of iron (II) sulfide are in 1.00 mL of iron (II) sulfide? The density of iron (II) sulfide is 4.84 g/cm^3
*March 22, 2010*

**CHEM**

how many gram of potassium bromide can be made from 13.7 grams of potassium and unlimited bromide
*March 22, 2010*

**chemistry**

how to write the oxidation number for CL4
*March 15, 2010*

**chemistry**

what is the smallest fraction of a milliliter to which you can make a measurement
*February 12, 2010*

**chemistry**

how would the electrons produced in a cathode ray tube filled with neon gas compare with the electrons produced in a cathode ray tube filled with chlorine gas?
*February 10, 2010*

**6th grade science**

what is a boundary between two air masses called
*January 28, 2010*

**phys. **

suppose your local electric company charges $0.0650/kWxh for the first 200.0 kWxh, and then drastically raises the price for every kilowatt-hour more. What is the maximum you family would pay if they wanted to pay only the cheaper rate?
*January 11, 2010*

**phys.**

a computer with a power input of 230.0 W (watts) has a resistance of 91.0 Ohms . how do you find the current in the computer?
*January 11, 2010*

**algebra**

What is -17p + 12p - 11p
*October 5, 2009*

**thermochemistry**

what is the enthalpy change in kilojoules for the combustion of 1 mol of ethanol, C2H5OH (l), to form gaseous carbon dioxide and gaseous water? use bond energies to calculate your answer. (hint: there is a double bond in carbon dioxide and oxygen) the answer is supposed to be...
*January 23, 2007*

**Predicting products for electrolysis**

when you have your 4 different equations to form 4 different possible equations, what two equations do you use for water, O2(aq) + 4H+ + 4e- ----> 2H20 (+1.23) 02 (g) + 2H2O (l) + 4e- ----> 4OH- (+0.40) 2H20 (l) + 2e- ---> h2 (g) + 2OH- (aq) (-0.83) I'm not quite ...
*January 16, 2007*

**Electrochemistry**

Hi, I'm in my final year of high school doing an electrochemistry unit and there is a concept I just dont really get. I would appreciate all helps please-- Redox reaction half reactions are: Oxidation: Zn(s) --> Zn 2+ (aq) + 2e- Reduction: Cu2+ (aq) + 2e- ---> Cu(s) ...
*January 14, 2007*

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