# Pamela

Most popular questions and responses by Pamela
1. ## Chemistry

A zinc-copper battery is constructed as follows at 25°C. Zn|Zn^2+ (0.15 M)||Cu2+(3.00 M)|Cu The mass of each electrode is 200. g. a) Calculate the cell potential when this battery is first connected. - i got this to be 1.14V b.) Calculate the cell

5. ## economics

the problem of what to produce in south africa is solved by?

6. ## chemistry

what is the total mass of Rn-222 remaining in an original 160-mg sample of Rn-222 after 19.1 days?

7. ## Math

Gina plans to invest $12,000, part at 4% simple interest and the rest at 6% simple interest. What is the most she can invest at 4% and still be guranteed at least$650 in interest per year?

8. ## math

Mr. Howard wrote the following expressions on the board in order to determine which expressions are equivalent and how they are equivalent. 60x+24, 3(20x+8, 4(15x+6) Explain which of these expressions are equivalent using properties of operations, and then

9. ## Chemistry

In this balanced equation 4Al + 3O2 = 2Al2O3. When 0.54 mole aluminum is reacted in a closed container with 7.80 g oxygen, how many grams of aluminum oxide can form. Please show steps to work out. Thanks

10. ## s

According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about

11. ## Social Studies

1. describe the achievements of the Maya, Inca, and Aztec. 2. what were the major similarities and differences between the Maya, Inca, and Aztec? 3. why did the Europeans begin to explore? 4. How did the Spanish conquer the Aztec and Incan empires?

12. ## math

A ship leaves POrt P and sails 28km away on bearing of 70 degrees to POrt Q. The ship then turns on a bearing of 160 degrees and sails 21km to POrt R. Find angle PQR, calculate the distance PR, Determine the bearing of R from P. angle PQR = 180 degrees -

13. ## Physics

A runner runs around a circular track with a radius of 50m.if he runs half way round the track from a to b.am i correct if i say his distance is 100m?

14. ## college chemistry

How much heat is needed to convert 2.00 kg of liquid ammonia at -40.0 oC to its vapor at -11.0 oC? The specific heat of liquid ammonia, NH3 (l), is 4.70 J/g-K and that of the vapor NH3 (g), is 2.20 J/g-K. The enthalpy of vaporization of ammonia is 23.3

15. ## Europe

how did europe's geography affect its development?

16. ## Science

2.1 Two blocks of mass M kg and 2.5kg respectively are connected by a light, inextensible string. The string runs over a light, frictionless pulley ,The blocks are stationary 2.1.1 calculate the tension in a string The coefficient of static friction

17. ## Chemistry

4Al + 3O2 = 2Al2O3. If 41.5 g aluminum and 69.0 g oxygen undergo a reaction that has a 67.0% yield, What mass of aluminum oxide forms. Please help by showing steps to find answers. Thanks

18. ## Math

There are 20 bottles in a box. Each bottle weighs 1 3/4 pounds. How many pounds do all the bottles weigh together?

19. ## Calc

Radioactive radium () has a half-life of 1599 years. What percent of a given amount will remain after years?

20. ## Research and Design

What changes did the Census Bureau make to the conceptualization and operationalization of race in the 2000 census?

21. ## chemistry

our lab experiment was Isolationa nd Identification of the Major Constituent of Clove Oil. We know the major component is Eugenol, but our professor wants us to write the equations for the extraction of eugenol from the distillate with dichloromethane and

22. ## math

Suppose the 435 members of the house of representatives are placed on committees consisting of more than 2 members but fewer than 30 member of members and each member is to be on one committees. Each committee is to have an equal number of members and each

23. ## Conflict Management Communications

Provide 2 examples of passive aggressive societal groups and behaviors. I thought the KKK would be one good example, any other thoughts would be most appreciated! Thank yoU! :)

24. ## Calculus

Derivative of the implicit Function: arctan(x^5y)=xy^5 Here is where I am at. I am pretty frustrated: arctan(x^5y)-xy^5=0 1/1+(x^5y)^2 * (d/dx(x^5)*y+x^5*d/dx(y))-(d/dx(x)*y^5+x*d/dx(y^5))=0 1/(1+x^5y)^2 * (5x^4y+x^5dy/dx) - (y^5+x^5y^4dy/dx)

25. ## math

what is 216.3 divided by 10.5? please show the work

26. ## chemisty

14KMnO4+4C3H5(OH)3----->7K2CO3+7Mn2O3+5CO3+16H2O how to do it help me if you can I spend days to find this but I couldn't please help mee.....

34. ## Thesis statement

I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help!

35. ## Thesis statement

I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help!

36. ## Maths

ABC is an isosceles triangle in which the equal sides are AB and A.If AD is an altitude and |BC|=1/2|AB|.Prove that |AD|^2=15|BC|^2

How do you figure out the place value of the stem and leaf of a stem-and-leaf plot???????????????

38. ## science

scientist do their experimental test more than once so they can reduce the effects of chance errors this is called conducting what

39. ## Math

Peter spends 1/4 of his salary on food, 1/3 on clothing and 1/5 on school fees. He saved the rest. What fraction if his salary did he save?

40. ## Statistics

A standard deck of cards contains 52 cards. Of these, 12 are face cards (kings, queens, and jacks), 13 are hearts, 13 are clubs, and 3 of these are both hearts and face cards. A card is drawn. What is the probability that the card is either a jack of

41. ## epidemiology

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department.

42. ## world history

As a result of the Peloponnesian war the Greek city-states suffered from political collapse.Are there any conclusions you can draw about how political collapse relates to the fall or survival of civilization? Well, if I understand the question correctly,

43. ## math

On Monday, Carlos ran 1/8 of a mile. On Wednesday, he ran 5/6 of a mile. Carlos ran 3/8 of a mile on Friday. Which day did Carlos run farthest?

44. ## Global Help!

Describe social, political and economic aspects of spanish rule in the Americas. I cant find this answer anywhere help please!!

45. ## algebra

Annual profit in thousands of dollars is given by the function,p(x)=200square x-3 +10,000,where x is the number of items sold in thousands, x less than 3. describe the meaning of the numbers 3 and 10,000 in the formula. find the profit for 5 different

77. ## Chemisty

Consider a hydrogen atom that goes from the n = 2 to the n = 1 state. (a) Calculate the wavelength, in nm, of the photon emitted. (b) What part of the electromagnetic spectrum is it?

78. ## math

Using the Octagonal formula how do you get the 6th octagonal number 96?

79. ## Language Studies

What are some ways that language can be used to perform the act of giving someone a warning?

80. ## Algebra

Suppose A is the amount borrowed, r is the interest rate (in decimal form), and m is the total number of monthly payments. Let w = (r)/(12) Then the formula to determine the monthly payment amount for a loan is given by (Aw)/1-(1)/(1+w)^m Suppose Alice

81. ## Environmental Science

I was wondering what are some natural resources needed for survival and the consequences for not having those resources. I would like some research cites or cite your resources(where you got the info)

82. ## Survery of Modern and Contemporary Art

I have to compare and contrast Rococo Architecture and Art Nouveau with political elements as well as historical relevance. I am having troubles finding information on these. Could you help me compare and contrast these, political elements and historical

the sides of the DNA ladder are made up of molecules of the sugar______and_______.

84. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

85. ## world history

why has most of the world impacted continuity change, economics, technology, social and political systems? I am not sure what you are asking. Please repost with more specifics. I hope this helps a little. Thanks for asking.

86. ## social studies

I'm writing an essay and would like to examine a few people's different opinions on this question in order to help me choose my own: Is the present US action in Iraq imperialism? Why? Thanks! You might browse the following search for ideas.

87. ## math lit,business studies,accounting and computer

Can I be an accountant when doing these subjects?

88. ## Science 2

How does TCDD act as an endocrine disruptor?

89. ## Science

What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?

90. ## College Algebra

Evaluate the function y=2.55^(x+1) at the value x=1.83

91. ## strayer

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department.

what is 9 /24794

93. ## biology

Which of the following are NOT used to classify kingdoms of organisms? a. complexity of the organism b. invertebrate or vertebrate c. method of obtaining nutrition d. type of cell that makes up the organism D?

94. ## Quantitative Methods of Business

Karl's monthly expenses are \$3,000. Of this 1/4 is for the mortgage payment, 1/8 is for credit cards, 2/5 if for the car payment, and the rest is for food and miscellaneous expenses. What is the amount of Karl's car payment?

95. ## Writing in Math

Every digit in 8,999 is greater ,than any digit in 24,005 is greater than 8,999.

97. ## Question.

What does this Question mean to you: Does the Protection of self-incrimination violate the fifth amendment? Does the police practice of interrogating individuals without notifiying them of their right to counsel?

98. ## physics, social studies

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

99. ## Math-precalc

Is it possible to find a rational function that has x-intercepts (-2,0) and (2,0), but has vertical asymptote x=1 and horizontal asymptote of y=0? The horizontal asymptote and the x-intercepts parts stump me. If you can't reach y=0, then how can you get