Sunday

June 26, 2016
Total # Posts: 432

**chemistry**

Calculate the relative molecular mass of a gas if a 500cm3 sample at 20¢ªC and 1 atomic mass of 0.66g
*June 21, 2011*

**american history **

Which of the following statements about the Southern planter's world is most accurate?
*June 2, 2011*

**english**

at what point does abigail first began feeling cold?what effect does this event have on danforth?
*May 17, 2011*

**ethics and social responsibilty**

what are some examples,explore the challenges Goodman presents to relativism
*May 9, 2011*

**I need help to unscramble these words in spanish**

Seclaalue
*April 26, 2011*

**Chemistry**

In this experiment the only source of Ca2+ ions is Ca(OH)2. Using the experimental Ksp value, calculate the slubility of Ca(OH)2 (in mol/L) in .30 M NaOH. Experiment Ksp = 1.69x10^-5
*April 24, 2011*

**physics**

For part a) T1 = Upper cord T2 = Lower cord theta = angle between vertical rod and upper cord = arcos(1/1.25) R = radius of circular motion = sqrt((1.25^2) + 1^2) M = mass of object T1sin(theta)+T2sin(theta) = (MV^2)/R Solve for V Turn your V (should be in m/s) into revs/min. ...
*April 21, 2011*

**Statistics**

77.3%
*April 11, 2011*

**chem**

How many liters of 12.3 molar NaOH stock solution will be needed to make 12.4 liters of a 1.2 molar NaOH solution? Show the work used to solve this problem.
*April 6, 2011*

**Science**

describe how our solar system formed.
*March 29, 2011*

**Chemistry**

How much water can be produced from the complete reaction of 2.56 L of oxygen gas, at STP, with hydrogen gas answer in units of g.
*March 29, 2011*

**Chemistry**

How much water can be produced from the complete reaction of 2.56 L of oxygen gas, at STP, with hydrogen gas answer in units of g.
*March 29, 2011*

**algebra 1**

Triple a number plus 7 results in 16. What is the number?
*March 29, 2011*

**chemistry**

How many moles of molybdenum are in 1.235 g
*March 3, 2011*

**physics**

In the figure , the total resistance is 10.0 kOmega, and the battery's emf is 28.0 V. If the time constant is measured to be 40.0 mu s. Calculate the total capacitance of the circuit.Calculate the time it takes for the voltage across the resistor to reach 15.0 V after the ...
*March 2, 2011*

**Chemistry**

How many grams of MgCl2 are required to make 350mL of a 0.56M solution of MgCl2?
*February 28, 2011*

**vareiables**

can you help me because i need a good science fair project
*February 24, 2011*

**Algebra**

Evaluate the exprestion: 2(3x+1)/-4 for each value of "x". A.x=9 B.x=2 C.x=-1 D.x=14
*February 17, 2011*

**algebra**

I dont know
*February 13, 2011*

**6th grade science**

true or false. genes are a small section of dna on hromosomes tha have information about a trait.
*February 7, 2011*

**math**

y=-2x+1
*February 3, 2011*

**physics**

A 5.75 µC and a -2.61 µC charge are placed 19.8 cm apart. Where can a third charge be placed so that it experiences no net force?
*January 25, 2011*

**physics**

two point charges have a total charge of 277 µC. When placed 2.00 m apart, the force each exerts on the other is 20.8 N and is repulsive. what are the charges on both?
*January 25, 2011*

**physics**

What is the magnitude of the force a +23 µC charge exerts on a +3.5 mC charge 49 cm away?
*January 25, 2011*

**statistics**

A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3 37.5 37 41.7 29.8 33.5 ...
*January 23, 2011*

**statistics**

A company is considering installing new machines to assemble its products. The company is considering two types of machines, but it will buy only one type. The company selected eight assembly workers and asked them to use these two types of machines to assemble products. The ...
*January 23, 2011*

**statistics**

A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3 37.5 37 41.7 29.8 33.5 ...
*January 23, 2011*

**statistic**

A company is considering installing new machines to assemble its products. The company is considering two types of machines, but it will buy only one type. The company selected eight assembly workers and asked them to use these two types of machines to assemble products. The ...
*January 23, 2011*

**calculus**

A cylindrical metal can with an open top is to be constructed. the can must have a capacity of 24pie cubic inches. the metal used to contruct the bottom of the can costs 3 times as much as the metal in the rest of the can. Find the dimensions(radius and height) of the can that...
*January 17, 2011*

**math**

what is the resipical of 9
*January 13, 2011*

**chemistry**

Calculate the temperature change in the water upon complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q =mC*Delta T to calculate the temperature change of the 314 g of water. under the following conditions: A 14.7 g ice cube ...
*November 17, 2010*

**chem**

You can use the Density equation: Density=Mass/volume. They give you the volume and density so you need to manipulate the Density equation to solve for mass. That should give you the grams of acetone in the bottle of acetone and you can use that to solve for the acetone ...
*November 15, 2010*

**Chem**

A 12.3 vessel was found to contain N2, Ar He, and He. The total pressure in the vessel was 987 torr and the partial pressures of nitrogen, argon, and helium were 44 torr, 486 torr, and 218 torr, respectively. What was the pressure of neon in the vessel?
*November 11, 2010*

**Math**

If you have 21tiles and there are twice as many blue than red and twice as many red than green how many red green and blue are there.
*November 10, 2010*

**Biology**

When living cells break down food molecules, energy is A)stored as a phosphate group added to ADP. B)stored as ATP. C)released as heat. D)all of the above
*October 28, 2010*

**project management**

How did it contribute to gross underbids and successive cost escalations?
*October 26, 2010*

**chemistry URGENT!**

No you fuc*ing morons...
*October 24, 2010*

**Enaglish**

avoiding predicate subject mismatching how to correct this sentence Measles is where a viral infection causes skin eruptions.
*October 21, 2010*

**6th grade**

how to solve equations containing integers?
*October 19, 2010*

**ALgebra**

use slopes to show that the triangle with vertices (-2,7), (6,9) and (3,4) is a right triangle. write an equation of the line that has y-intercept 5/7 and is parallel to the graph of 6x-3y=1
*October 19, 2010*

**ALgebra**

find an equation of the line containing, (4,-2) and parallel to the line containing (-1,4) and (2,-3) find an equation of the line containing (-1, 3) and perpendicular to the line containing (3,-5) and (-2,7)
*October 19, 2010*

**math**

Tell how you could use line to determine which of two number is greater
*October 18, 2010*

**math**

Write three number that are greater than 1,543,000 but less than 1,544,000
*October 18, 2010*

**algebra**

one plane left an airport at 11:30 am. A second plane, traveling at 320 mph left the same airport at 1:00 pm and overtook the first plane at 4:30 pm. At what speed was the first plane traveling?
*October 17, 2010*

**math**

Alieta was playing the "win a flat"game and had 7 ten rods and 3 unit squares. She rolled a 9. How many ten rods does she have after the exchanges are made?
*October 12, 2010*

**Computer Flowcharts**

no clue
*October 12, 2010*

**geography**

if a city has a latitude of 45 degree south, what can you infer about their climate.
*October 12, 2010*

**english**

identify the verb,subject in the sentence.a cloud of fruit flies hovered over the banana
*October 7, 2010*

**math**

A video game store charges a monthly membership fee of $7.50 but the charge to rent each movie is only $1.00 per movie. Another store has no membership fee but it costs $2.50 to rent each movie. How many movies need to be rented each month for the total fees to be the same ...
*September 26, 2010*

**Math**

So if i eliminate C first would the resulting two equations be: (8/3A) + (8/3B) = 1 (1/A) + (1/B) = (-8/20) ???????
*September 24, 2010*

**Math**

A and B caan finish typing a manuscript in 8/3 days; B and C together, in 40/9 days; A and C together in 20/7 days. How long will each, working alone type the manuscript?
*September 24, 2010*

**calculus**

I have an even number of coins in my pcket exactly one third of them are dimes. Draw or stampo the coins i could have in my pocket. Record thir value.
*September 21, 2010*

**Trig**

verify following trigonometric identities. 1/sec0tan0 = csc0 = sin0
*August 24, 2010*

**chemistry**

DeltaH=TdeltaS
*August 2, 2010*

**Individual Income**

19. Dan's taxable income falls in the 15% tax bracket. Included in his taxable income is $5,000 of ordinary dividends, of which $2,000 are qualified dividends. The amount of tax Dan will pay on his qualified dividends is: a. $300. b. $0. c. $250. d. $100. e. $200.
*June 30, 2010*

**math**

how many combinations of coins equal 2.00 when given 12 quarters, 10dime ,10 nickels and 20 pennies.
*June 9, 2010*

**Math 116**

yea sorry
*June 6, 2010*

**Math 116**

The lengths will have to be greater than 24 or 24<
*June 6, 2010*

**math**

What's that formula called?
*June 6, 2010*

**math**

Okay I got this question on a test. I am not sure what I am supposed to do here. Can you show me how I would go about solving this. A basketball player can jump 33in vertically. Find his hang time. Round to the nearest tenth. Thanks
*June 6, 2010*

**math**

what is 4j-3=5
*June 4, 2010*

**rational expressions**

1)Can z+6/z+1 be reduced any further? 2)Add and simplify (v/v^2+8v+16) + (4/v^2+7v+12) 3)For this second binomial do you change the the sign of the second term? Subtract and simplify (1-y/y-2) - (9y-8/2-y) 4)Solve (4/5)+(1/2)=(1/x) 5)(8/x)=(9/x)-(1/2)
*May 31, 2010*

**math**

1)Can z+6/z+1 be reduced any further? 2)Add and simplify v/v^2+8v+16 + 4/v^2+7v+12 3)For this second binomial do you change the the sign of the second term? Subtract and simplify 1-y/y-2 - 9y-8/2-y 4)Solve 4/5+1/2=1/x 5)8/x=9/x-1/2 Thanks!
*May 31, 2010*

**introductory algebra**

I had these problems on my test and for some reason got them wrong. Here are the problems: Solve: x-y=9 x+y=1 The test states that the answer is (5,-4) I've checked ,y work and used substitution to solve this and still get x=4, y=-5. The second problem is: Solve the system...
*May 23, 2010*

**How Children Learn**

. A Correct 2. C Correct 3. C Correct 4. A Correct 5. C Correct 6. A Correct 7. D Correct 8. C Correct 9. A Correct 10. C Correct 11. D Correct 12. B Correct 13. A Correct 14. A Correct 15. B Correct 16. C Correct 17. C Correct 18. B Correct 19. C Correct 20. A Correct
*May 19, 2010*

**english**

What does this mean? If you are home studying…I hope you’re at least doing so outside! I am foreign exchange and I do not understand this. Thank You.
*May 4, 2010*

**Science**

How is the kinetic-molecular theory related to specific heat, joules, and calories??
*April 30, 2010*

**CHEMISTRYYY**

this isnt the right way. i used this way and i got a different asnwer
*April 26, 2010*

**reading/language please check**

When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.
*April 16, 2010*

**chemistry**

how to write a net ionic equation of CaS+CuCl2
*April 16, 2010*

**IPC**

IF THE SIDE OPPOSITE A 45 ANGLE IN A RIGHT TRIANGLE 12.5 METERS, HOW LONG IS THE ANGLE?(ROUND THE ANSWER TO THE NEAREST TENTH)
*April 14, 2010*

**PHYSICS**

The magnetic field inside an air-filled solenoid 39 cm long and 2.0 cm in diameter is 0.85 T. Approximately how much energy is stored in this field?
*April 11, 2010*

**PHYSICS**

What is the inductance L of a 0.40 m long air-filled coil 3.2 cm in diameter containing 10,000 loops?
*April 11, 2010*

**PHYSICS**

What is the inductance of a coil if the coil produces an emf of 8.20 V when the current in it changes from -28.0 mA to +31.0 mA in 45.5 ms?
*April 11, 2010*

**PHYSICS**

If the current in a 100 mH coil changes steadily from 25.0 A to 10.0 A in 375 ms, what is the magnitude of the induced emf?
*April 11, 2010*

**Chemistry**

No, it C BECAUSE THE ELEMENTS NEED TO BE IN THE MOS ESTABLE STATE C(S) AND O2(G)
*April 7, 2010*

**PHYSICS**

A 14 cm diameter circular loop of wire is placed in a 0.58 T magnetic field. (a) When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? (b) The plane of the loop is rotated until it makes a 36° angle with the field lines...
*April 3, 2010*

**PHYSICS**

A 29.4 cm long solenoid 1.10 cm in diameter is to produce a field of 0.360 T at its center. How much current should the solenoid carry if it has 1000 turns of the wire?
*April 3, 2010*

**physics**

A thin 12 cm long solenoid has a total of 460 turns of wire and carries a current of 2.1 A. Calculate the magnitude of the field inside near the center.
*April 3, 2010*

**chemistry**

what is the maximum number of grams of PH3 that can be formed when 6.2 g of phosphorus reacts with 4.0 g of hydrogen to form PH3
*March 21, 2010*

**optics ray tracing**

light travels in a straight line, why is this important for the technique of ray tracing?
*March 21, 2010*

**Business**

I need like an outline to help me write this...maybe even if it was started for me
*March 9, 2010*

**Business**

Prepare a 600 to 700 word analysis of the relationship between humans and time. Include a description of the historical development of the human ability to conceptualize and measure time. Also, examine why humans have a need to measure time, and describe how the ability to ...
*March 9, 2010*

**science**

does carbonation or amountof caffeine in a drink or liquid affect plant growth?
*March 7, 2010*

**ur papa**

pizza
*March 1, 2010*

**Algebra with pizzazz**

add the 7 to 17 4x>24 divide by 4 x>6
*January 27, 2010*

**Calculus**

A manufacturer sells a certain article to dealers at a rate of $20 each if less than 50 are ordered. If 50 or more are ordered(up to 600) the price per article is reduced at a rate of 2 cents times the number ordered. What size order will produce the maximum amount of money ...
*January 27, 2010*

**Calculus**

A manufacturer sells a certain article to dealers at a rate of $20 each if less than 50 are ordered. If 50 or more are ordered(up to 600) the price per article is reduced at a rate of 2 cents times the number ordered. What size order will produce the maximum amount of money ...
*January 27, 2010*

**health**

what a lymph node is
*January 7, 2010*

**Physics**

the temperature of ice according to our physics teacher is -5 degrees celcius
*January 7, 2010*

**Physics**

How many grams of ice must be added to 100 grams of water at 60 degrees so that its temperature drops to 20 degrees celcius? As far as i know I have to use: (Mass)*(specific heat of water) *(finaltemperature - initial temperature = ??
*January 7, 2010*

**Chemistry**

what is the density that has a mass of 77.0 g and a volume of 36 mL?
*January 4, 2010*

**Chemistry**

what is the density that has a mass of 77.0 g and a volume of 36 mL?
*January 4, 2010*

**Math**

What it 120+119+118+117+116...+2+1
*December 27, 2009*

**Statistics**

population
*December 17, 2009*

**6th grade**

At 36 degrees, how long will it take for a sheet of ice 5' x 5' 6" deep to melt?
*December 16, 2009*

**6th grade**

nation that conquered many areas of india
*December 9, 2009*

**7th grade**

what is the gcf of 35a^2 and 85ab
*December 2, 2009*