Saturday

July 30, 2016
Total # Posts: 2,507

**Chemistry**

Given the following unbalanced equation C4H10 (g) + O2 (g) → CO2 (g) + H2O (l) What mass of water forms if 6.5 L of C4 H10 (g) measured at STP is allowed to react with 32.0 L of O2 (g)measured at 27°C and 1.68 atm pressure? Would it be 26.1 (g)
*May 2, 2013*

**chemistry**

The volume of a mass of gas is 300 ml at 25°C and 685 torr. What will the gas occupy at STP? Would the answer be 248 ml?
*May 2, 2013*

**Math**

i need help with square feet and cubic
*May 1, 2013*

** 5th grade Math**

How do you add fractions with different denominators? Thanks if you help :)
*May 1, 2013*

**Chemistry**

Thank you again!
*April 26, 2013*

**Chemistry**

Thank you Bob for your time! I believe there was a misunderstanding in the question,my mistake... C is equal to degree celcius.
*April 26, 2013*

**Chemistry**

How much ice (in grams) would have to melt to lower the temperature of 53.4g of water from 65 C to 0C? I know there are more than one step here, I would appreciate an answer that does not do the work for me, but show me how to lay out the problems and in which order... thank you!
*April 26, 2013*

**Chemistry**

0.01M? Is is really that simple, or did I mess up?
*April 25, 2013*

**Chemistry**

Calculate the H3O concentration if 100.0 ml of the .10M HNO3 solution is diluted to 1.0L with water?
*April 25, 2013*

**Science**

I'm studding forces and motion what is the difference between velocity and speed.Thanks if you help:)
*April 25, 2013*

**Math**

6-4 3/10=
*April 25, 2013*

**math**

1(1/6) x 3/8=
*April 25, 2013*

**math**

6-4(3/10)=
*April 25, 2013*

**Physics/Astronomy**

A pulsar is a stellar object that emits light in short bursts. Suppose a pulsar with a speed of 0.975c approaches Earth, and a rocket with a speed of 0.999c heads toward the pulsar (both speeds measured in Earth’s frame of reference). If the pulsar emits 20.0 pulses per ...
*April 25, 2013*

**Social studies please help!**

I have one more question can you compare Mayan civilization to The Aztec civilization sorry for the confusion
*April 24, 2013*

**Social studies please help!**

I don't know I'll have to ask my teacher thank you for the help
*April 24, 2013*

**Social studies please help!**

Or the Incan but I'm not sure please help
*April 24, 2013*

**Social studies please help!**

It doesn't say all it is is another ancient one. Is Aztec an ancient river valley?
*April 24, 2013*

**Social studies please help!**

Please I need this for a grade
*April 24, 2013*

**Social studies please help!**

Compare Mayan civilization to another ancient river valley civilization. Include at least two similarities.
*April 24, 2013*

**Statistics**

0.334
*April 24, 2013*

**Reading (Mrs.Sue Please Help)**

Can someone tell me what context clues are? Can you give me some examples? Thanks if you help:)
*April 22, 2013*

**Social studies(Mrs.Sue Please Help)**

Can someone tell me what are context clues are? Can you give me some examples? Thanks if you help:)
*April 22, 2013*

**Biology**

How many daughter cells will one cell have after 3 complete meiosis processes? Answer A) 8 B) 12 C) 16 D) 64
*April 21, 2013*

**MATH HELP!!!!!!!!!!**

If the first bell is at 8:12 but the all the buses are at the school at 8:00 (around 8:05 they let all the students out of the bus). It's takes 41 minutes from home to get to school. What time does your bus comes in the morning and what time you have to walk up? please ...
*April 20, 2013*

**MATH HELP!!!!!!!!!!1**

IS IT 7: 31 (that the bus comes)
*April 20, 2013*

**MATH HELP!!!!!!!!!!1**

8:12 minus 41 minutes
*April 20, 2013*

**Math**

How do we rewrite 7/a - 9/b so that both terms have the denominator ab?
*April 18, 2013*

**spanish**

It is: Los pantalones son bonitos y el precio no es muy alto:I should know i speak spanish.
*April 17, 2013*

**5th grade reading**

Can someone tell me what is the difference between an idiom and a hyperbole?Thanks if you help!:)<3
*April 17, 2013*

**Math**

1 yard=3 feet all you have to do is multiply 3*5 which will equal 15.
*April 17, 2013*

**math**

How do you work with line plots like adding them and how much there is?Thanks if you help!:)<3
*April 16, 2013*

**math**

How do you figure out the volume of irregular shapes?Thanks if you help!:)<3
*April 16, 2013*

**Chemistry**

A) 50.0mlx 1.0g/ml= 50.0g B) 50.0g(4.814)(34.7c-23.3c)= 2743.98 C) 13.5j/c(34.8-23.3)= 153.9 D)2743.98-153.9=2590.08 E)0.0125(1000/1)= 12.5 J? Is this correct? By the way thank you for your help.
*April 16, 2013*

**Chemistry**

I honestly don't know where to begin on this problem.
*April 16, 2013*

**Chemistry**

b) The heat absorbed by the solution. c) The heat absorbed by the calorimeter d) The heat released by the reaction e) The enthalpy change of the reaction
*April 16, 2013*

**Chemistry**

3. 25.0 mL of a 0.50 M solution of acid HA was combined with 25.0 mL of a 0.50 solution of base MOH in a calorimeter with a calorimeter constant of 13.5 J/ C. The initial temperature of the solution was 23.3 C and the maximum temperature was 34.7 C. The resulting solution had ...
*April 16, 2013*

**Chemistry**

A)60.0g(4.814)(48.9-37.3)=3350.544 B)40.0(4.814)(20.4-37.3)=3254.264 C)A-B= 96.28
*April 16, 2013*

**Chemistry**

For part A) I know it goes something like this. 40.0g(4.184)(48.9-37.3). But it asks for heat released by hot water i'm not exactly sure what to do. I know c is A)-B)
*April 16, 2013*

**Biology**

Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
*April 14, 2013*

**Biology**

PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of years ago did ...
*April 14, 2013*

**Biology**

Fish have a two chambered heart called a single loop. Discuss the benefits and drawbacks of this system.
*April 14, 2013*

**Math**

Around 89% 0.888888888888888888888888889 Repeating 0.89
*April 14, 2013*

**Biology**

Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians like frogs have from fish.
*April 14, 2013*

**Biology**

Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen from the lungs) and ...
*April 14, 2013*

**Biology**

Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
*April 14, 2013*

**Chemistry**

20.0 mL of HCl in a flask Titration required 12.3 mL of 0.108M Mg(OH)-2 What is the molarity of the HCl?
*April 13, 2013*

**Calculus please help !**

(0,1) 45 36
*April 12, 2013*

**English**

What are some connections* to Rip Van Winkle? *Connection to... -Self -World I need connection to other books and things
*April 11, 2013*

**English**

What are some connections* to Rip Van Winkle? *Connection to... -Self -World I need connection to other books and things
*April 11, 2013*

**English**

Like I need connection to other books and things.........
*April 11, 2013*

**English**

What are some connections* to Rip Van Winkle? *Connection to... -Self -World
*April 11, 2013*

**physics**

The kiloton, which is used to measure the energy released in an atomic explosion, is equal to 4.2 multiplied by 1012 J (approximately the energy released in the explosion of 1000 tons of TNT). Recalling that 1 kilocalorie of energy raises the temperature of 1 kg of water by 1&...
*April 10, 2013*

**College Chemistry**

You weigh a sample of a monoprotic unknown acid and dissolve it in 50.00 mL of distilled water. Exactly half of this solution is titrated with Sodium Hydroxide to the phenolphthalein end point. The pH of the other half of the original solution is measured with a pH meter. The...
*April 9, 2013*

**home work**

A framed picture has length 50 cm and width 40 cm . The picture itself has area 1344 cm^2. How far is it from the edge of the picture to the edge of the frame if thid didtance is uniform around the picture ?
*April 9, 2013*

**Probability**

In a cookie jar, there are 6 choco chip cookies and 8 oatmeal cookies. Kim takes out the cookies one at a time and proceeds to eat them. The probability that the 7th cookie that Kim eats is a choco chip cookie is a/b, where a and b are positive coprime integers. What is the ...
*April 8, 2013*

**Problem Solving! please I need more help!!**

How long will it take $4,000 to grow to $16,000 if invested at 5% compounded monthly?
*April 7, 2013*

**Spanish 2**

A nosotros NOS aburre ir de compras.
*April 5, 2013*

**science**

What are the large- and small- scale causes of climate and weather?
*April 5, 2013*

**Art**

1) assemblage 2)op art
*April 5, 2013*

**chemistry**

Calculate the concentrations of all species present C6H5N2, C6H5NH3+ OH^-, and H3O^+}) in a 0.14 M solution of aniline.
*April 5, 2013*

**Physics**

The diameter of the atom is proportional to n2, where n = 1 labels the lowest, or "ground" state, n = 2 is the second state, n = 3 is the third state, and so on. If the atom's diameter is 1 multiplied by 10-10 m in its lowest energy state, what is its diameter in...
*April 5, 2013*

**Human Services HSM/260**

Explain your understanding of the two procurement strategies listed in the text. Which of the two procurement strategies is most effective for a human service agency? Explain your reasoning.
*April 3, 2013*

**stats**

Question Part Points Submissions Used The number of ships to arrive at a harbor on any given day is a random variable represented by x. The probability distribution of x is as follows. (Give your answers correct to two decimal places.) x 10 11 12 13 14 P(x) 0.35 0.15 0.15 0....
*April 2, 2013*

**help making equations**

Superbats, Inc., manufactures two different quality of wood baseball bats, the Wallbanger and the Dingbat. The Wallbanger takes 8 hours to trim and turn on a lathe and 2 hours to finish it. It has a profit of $17. The Dingbat takes 5 hours to trim and turn on a lathe and 5 ...
*April 2, 2013*

**STATs 353**

Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 68,58,64,62,58,67 After 40,42,46,37,45,38 Lower limit: Upper limit:
*April 2, 2013*

**Physics**

A test rocket is fired up from rest. The net acceleration is 20m/s^2 upward and continues for 4.0 seconds, at which time the rocket engines cease firing. What maximum elevation does the rocket reach?
*April 1, 2013*

**maths**

There are 3 solutions with real numbers and 4 solutions with complex numbers
*April 1, 2013*

**Gr 10 science**

I can't find a picture to build a model of calcium sulphate using styrofoam ball pls help
*March 31, 2013*

**math**

How do you solve systems of inequalities in two variables?
*March 30, 2013*

**algebra**

thank you for the help :)
*March 30, 2013*

**algebra**

its allowed in the inside
*March 30, 2013*

**algebra**

not sure dosent really say
*March 30, 2013*

**algebra**

whoops its supposed to be (2,1)(2,4)(6,4)(6,1)
*March 30, 2013*

**algebra**

directions Write a system of inequalities for the shaded region described. The shaded region is a rectangle with vertices at (2,1)(2,4)(6,4)
*March 30, 2013*

**math**

How do you solve systems of inequalities in two variables?
*March 30, 2013*

**Math**

Write 2.97 as a fraction, decimal and percent
*March 28, 2013*

**Math**

The face painting booth has 1/4 pint of paint. There are five students who want their faces painted. How much paint should we use for each child?
*March 27, 2013*

**Math**

The popcorn booth serves tubs that weigh 3/74 of a pound. Mrs. Taylor has a box that weights 6 ponds. How many tubs can she make from the box?
*March 27, 2013*

**Math**

Mr. Brown bought 4 boxes of stickers to school. Each student that came to his class received 1/5 of the box. How may students will get a sticker before they run out?
*March 27, 2013*

**english**

course journal penn foster
*March 25, 2013*

**Literacy**

Which search engine would be best to use when you want to know if your library carries a particular journal? A. Google Scholar B. Worldcat C. Webarchive D. All the Web my answer is a 2. Which of the following sets of Library of Congress call numbers is in the correct order? A...
*March 24, 2013*

**University of Nairobi**

Simple question :D
*March 23, 2013*

**Math **

Please help Ms.Sue! a contractor's designing one side of an office building 48 feet in length the windows are each 5 feet long and will be placed Six feet apart and 5 feet from the end of the building wall how many windows can a contractor design
*March 18, 2013*

**Math**

Thanks!
*March 18, 2013*

**Economics**

Protecting intellectual property rights can result in new inventions that help the economy to grow. True False
*March 18, 2013*

**science**

If the acceleration due to gravity on the earth is 9.8 , what is the acceleration due to gravity on Rams?
*March 15, 2013*

**statistics**

A diabetes nurse educator believes that her patients have particularly bad control of their blood sugar. To test this she selected the fasting blood sugar values for 15 of the patients she saw this week. The national mean for patients with this level of severity of diabetes is...
*March 14, 2013*

**Science**

What was the main difference between Dalton's model of the atom and the model that was first developed by the Greeks?
*March 14, 2013*

**Math**

Sam ate 1/4 of the pizza. If the pizza has 8 slices, how many slices are left?
*March 13, 2013*

**Math**

The clementine had 12 sections. Noah at 3/4 of them. How many sections are left?
*March 13, 2013*

**calculus help please!**

I am not sure how to start this!
*March 12, 2013*

**calculus help please!**

The infamous Wile E. Coyote has been chasing the Roadrunner again. His latest idea for a trap involved launching an enormous boulder (about 16ft in diameter) up to a height of 750 ft, hoping that it would come down crashing on the unsuspecting Roadrunner. Unfortunately, as ...
*March 12, 2013*

**Spanish please help!**

Complete each sentence with the correct form of the verb in parentheses. 1. La clase de matemáticas (terminar) a las cuatro. 2. ¿Te gusta (estudiar) psicología? 3. La profesora (explicar) el mapa. 4. Necesito (comprar) el libro de español. 5. ...
*March 10, 2013*

**math**

Find the slope m and an equation of the tangent line to the graph of the function f at the specified point. f(x)=x^2/x+4 ;(1,1/5) m =?? y =??
*March 8, 2013*

**statistics(HELP)ASAP**

an art school knows that in general they go through 38 colored pencils per week. they have asked their students to hold their pencils differently over the past 10 weeks and wonder whether this has made a significant difference in the number of penccils they go through. dat aon...
*March 8, 2013*

**ALL subjects..**

help in all subjects all the way from namibia....
*March 8, 2013*

**English**

I need an good attention getter for a research paper on basketball. Please Help
*March 7, 2013*

**literacy**

To determine the best place to begin your online research, you should first A. formulate your research question B. choose severval verbs and modifiers to help define your search. C. identify keywords and search terms D. settle on a single, concise search term or phrase my ...
*March 7, 2013*