Thursday

February 23, 2017
Total # Posts: 517

**Chemistry **

What are at least 2' real world uses of colligative properties?

*February 7, 2017*

**CHEMISTRY**

1. Not sure of how to do the calculations... Make a 0.200 m solution of NaCl in a 100. mL volumetric flask. ... Solution A's question or statement is the same but with M (molarity) Is this right? The small m means molality. If it were changed to capital M, then solution A...

*February 3, 2017*

**History**

What diseases were originated or were most common in the 12th century?

*November 13, 2016*

**Math, Precalc**

A fishing boat leaves port at 4 miles per hour at a bearing of 80? for 3 hours, then turns to a bearing of 0? at 3 miles per hour for 4 hours, and finally changes to a bearing of 200? at 6 miles per hour for 5 hours. At this point, the boat heads directly back to port at a ...

*November 10, 2016*

**Math, Precalc**

Find, to the nearest tenth of a degree, the angle formed by the two main diagonals of a cube that connect consecutive vertices of the lower base to the opposite consecutive vertices of the upper base, as illustrated at right.

*November 6, 2016*

**Physics**

A plane leaves Seattle, flies 77.0 mi at 21.0 ∘ north of east, and then changes direction to 52.0 ∘ south of east. After flying at 124 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue ...

*October 13, 2016*

**World History**

The Arabs carried an expensive trade both by (blank) and by camel (blank)

*September 20, 2016*

**Math**

15.5

*August 25, 2016*

**math**

Name the sets of numbers to which the given number belongs 60/47

*July 7, 2016*

**Please help me with this math**

3k is less than 9 solve for k i have been working on this for two hours!!!!

*May 25, 2016*

**algebra II**

Joe has 120 coins consisting of dimes and quarters with a value of $19.05. how many dimes and quarters does Joe have?

*May 19, 2016*

**geometry**

2004-06-01-04-00_files/i0320000.jpg Find the volume of the cone. Round your answer to the nearest hundredth.

*March 25, 2016*

**Maths**

Julie is j years old. Her father is four times as old as Julie and her mother is seven years younger than her father. How old is each person?

*March 15, 2016*

**math**

lim f(x) xcubed - 8/ xsquared -5x+8 x --2

*March 9, 2016*

**Computer Science**

Create a Raptor Flowchart that calculates the amount a person would earn over a period of time if his or her salary were five cents the first day, ten cents the second day, and so on doubling each day. Your program should: 1. Request the number of days. 2. Display a table ...

*February 18, 2016*

**Math**

the ratio of father's age to his son age is 8:3. in 5 year's time the sum of their ages will be 54. how old are they

*February 14, 2016*

**college math**

a basketball team played 68 games they won 22 more than they lost. how many games did they win? how many games did they lose?

*January 26, 2016*

**Spanish**

kjwqrgf08r3pxbwyftg3[97rwufgbp83frgbpiyr

*January 6, 2016*

**Chemistry**

How do you determine the number of valence electrons in one atom of each of the following elements. ... We had 20 elements overall for homework so I listed the first 5 A) Na B.) F C.) Rb D.) Ba E.) I

*December 2, 2015*

**health**

never mind. the correct answer is A

*November 30, 2015*

**health**

Every ________, nerve impulses stimulate the breathing process, or ventilation, which moves air through a series of passages into and out of the lungs. A. 5 to 7 seconds B. 3 to 5 seconds C. 1 to 3 seconds D. 7 to 9 seconds I think its B

*November 30, 2015*

**Chemistry**

a 6.0 mole sample of Ca3(PO4)2 and a 12.0 mole sample of SiO2 react in an evacuated vessel. after one of the reactants is fully consumed, how much of the gas is created? How exactly would you solve this problem? Would you have to find the molar mass of both sides and divide by...

*November 18, 2015*

**Geometry**

I have AB=Bc Theorem of Midpoint CD=DE Theorem of midpoint BC=CD Definition of Congruency AB=CD Def. Of Con AB+BC=AD Seg. addition post. CD+DE=CE Seg. Addition Postu. ABC+CDE=AE Seg, Addition postulate Cis midpoint of AE midpoint Theorem. My teacher wants 17 steps!

*October 5, 2015*

**Geometry**

Given: B is the midpoint of line AC. D is the midpoint of line CE. Ab=De Prove AE=4AB

*October 5, 2015*

**Reading**

Need to finish reading a book but I am on pg 76 and thar is 178

*September 21, 2015*

**math**

3. The café serves chocolate, vanilla, and strawberry ice cream. You may also get in on a cone, in a bowl or in a cup. They have sprinkles and caramel as toppings too. How many different combinations of ice cream, servings and toppings can be made?

*September 1, 2015*

**health**

Ms. Sue can you please try to help answer the question instead of pasting useless links?!?!?!? I would appreciate

*July 8, 2015*

**Finance**

a share of preferred stock of MXT LTD. is expected to pay 1.0 per quarter into indefinite future. the current required annual expected rate of return, k, is 8%. suppose that an investor buys 10 shares today and wants to hold these shares for the next 2 years. find his/her cash...

*June 11, 2015*

**Chemistry**

Find the Density of xenon of STP

*March 10, 2015*

**Chemistry**

Find temperature of 20.0g of nitrogen that occupies volume of 500.0ml at pressure 0.45 bar.

*March 10, 2015*

**chemistry**

Find volume of carbon dioxide occupied by 1.0g of CO2 at 0 degrees Celsius and pressure 25.0 torr.

*March 10, 2015*

**Chemistry**

Find pressure exerted by 2.0g of helium enclosed in a 100.0 ml container at 25 degrees Celsius

*March 10, 2015*

**Chemistry**

you would be surprise what he actually leaves out.

*March 10, 2015*

**Chemistry**

Explain Why some ionic compounds are soluble in water. Explain why non-ionic compounds, such as ethanol or sugar are soluble in water. Explain what a saturated solution.

*March 10, 2015*

**Chemistry**

How to prepare 250ml of 0.2 M hydrochloric acid from 2.5 M hydrochloric acid.

*March 10, 2015*

**chemistry**

Find volume (in ml) of 0.3 M solution of sodium chloride containing exactly 3.0g of sodium chloride.

*March 10, 2015*

**Chemistry**

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide

*March 10, 2015*

**Chemistry**

A solution contains one or more of the following ions: silver, barium, and Copper (II). CY 105 student adds sodium chloride to a small sample of the solution of the unknown and a white precipitate is formed. He/she filters out the precipitate and then add sodium carbonate to ...

*March 10, 2015*

**chemisty**

find the oxidation state of a carbon in methane, carbon monoxide, carbon dioxide, CH2O, acetic acid, carbonic acid, methanol, and benzene (C6H6)

*March 10, 2015*

**chemistry**

I really need help working them out they all look different to me

*March 10, 2015*

**chemistry**

find the volume of 0.1 M hydrochloric acid required to react with 22.0ml of 0.07 M barium hydroxide

*March 10, 2015*

**chemistry**

find volume of 0.2 M sulfuric acid required to react with 15.0 ml of 0.25 M sodium hydroxide

*March 10, 2015*

**chemistry**

your not getting the picture I need help to study for an exam because I do not get this.

*March 10, 2015*

**chemistry**

find mass of magnesium nitride produced in reaction of 5.0of magnesium with 10.0gof nitrogen. the reaction was carried out in a closed container

*March 10, 2015*

**chemistry**

Find composition of post-reaction mixture if 10.0 g of sulfur and 20.0 g of iron were reacted in a closed container producing iron (II) sulfide.

*March 10, 2015*

**chemistry**

that is exactly how it is worded on the pretest we have to study by

*March 10, 2015*

**chemistry**

find composition of post-reaction mixture if 10.0g of sulfur and 20.0g of iron were reacted in a closed container producing iron (II) sulfide

*March 10, 2015*

**chemistry**

to be honest I don't understand any of it I have a foreign chemistry teacher and I am not getting any of it.

*March 10, 2015*

**chemistry**

find mass of sulfuric acid obtained in reaction of 20.0g if sulfur trioxide with excess of water

*March 10, 2015*

**chemistry**

find mass of calcium carbonate obtaqined in reaction of 10.0g of calcium oxide with an excess of carbon dioxide

*March 10, 2015*

**Chemistry**

Find the molarity of a sodium hydroxide solution obtained by dissolving 125.0 mg of sodium hydroxide in 50.ml volumetric flask.

*March 10, 2015*

**Astronomy**

The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for circular ...

*February 15, 2015*

**Math**

Hello! Can you check my answers for these 4 worksheet questions? Thank you in advance (: 1. The following ordered pairs give the scores on two consecutive 15-point quizzes for a class of 18 students. (7, 13), (9, 7), (14, 14), (15, 15), (10, 15), (9, 7), (14, 11), (14, 15), (8...

*January 28, 2015*

**Math / Algebra**

Can you check my work? Thank you :) 1. The Domain of a function F is the same as the range of F^-1 (True or False?) Answer: True. 2. Does the function y = |x-2| have an inverse? Select the best answer. A. Yes, it passes the horizontal line test. B. No, it does not pass the ...

*January 27, 2015*

**physics**

An object has the following equation of motion (equation describing its position as a function of time). x(t) = x0 where x0 = −2.3 m. What is the object’s position at time t = 23 s? What is its velocity?

*January 23, 2015*

**Biology**

A point mutation is a a mutation affecting only one or very few nucleotides in a gene sequence. So out of those four choices, it would be where only one is affected. The first choice, (A-A-A-T-G-C) Is correct.

*December 31, 2014*

**Physics**

Station Math Two station astronauts will each perform two 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your ...

*December 27, 2014*

**chemistry**

write the mass number, atomic number,number of protons, neutrons,and electrons for He, Si, K+, N3-

*December 16, 2014*

**chemistry**

an ice cube has a mass of 4.3g and a mass of 5.0mL it is placed in a 30mL of oil that has a mass of 27 g will the ice cube float or sink in the oil

*December 16, 2014*

**Social Studies**

Quebec act

*December 14, 2014*

**Chemistry**

Complete the Bronsted- Lowry reaction, placing each product by its appropriate label. HCO3^-+HNO2 (double arrows) need a spot for acid and for base.

*December 5, 2014*

**algebra**

It grew 7.66 inches repeating every week.

*November 17, 2014*

**physical science**

780 J/s

*November 6, 2014*

**math**

20+10+9+7=46 There are 20 students in 9th Grade. 20/46=0.43478261 The percentage of students in the ninth grade riding the bus are 43%.

*October 6, 2014*

**maths**

by how much does the 3 in 34685 exceed the 3 in 23487

*September 17, 2014*

**Math Help!**

Those are the answers in my book. & Sorry! How about now? 1. C 2. A 3. D

*May 21, 2014*

**Math Help!**

1. D 2. B 3. C

*May 21, 2014*

**Math Help!**

1. Find the product. (2x)(10x) 20x 12x 20x^2 5x 2. -3m(m + 8) -3m^2 + 24 -3m^2 + 24m -24m^2 -4m + 5 3. 4d(2d - 9) 8d - 36d -d -28d^2 8d^2 - 36d

*May 21, 2014*

**Math 2**

So is the answer 1/12yard, if she has 1/4 yard of fabric, and cuts it into 3 equal pieces?

*May 15, 2014*

**Math 2**

Is the answer 1/12. 1/4 multiplied by 1/3 is how I got that. Is that correct?

*May 15, 2014*

**Math 2**

Ammeter has 1/4 of fabric. She cuts it into 3 equal pieces. What fraction of a yard is each piece of fabric?

*May 15, 2014*

**Math 2**

John solved 1/5 divided by 10 by using a related multiplication expression. Which multiplication expression did she solve? Choices are A. 5 *10 B. 1/5 *10. C. 5* 1/10 d. 1/5 *1/10

*May 14, 2014*

**Statistics**

A simple random sample of 27 adult mice has a length standard deviation of 0.66 mm. Using a 0.10 level of significance, does it appear that these mice come from a population with a length standard deviation of 0.87 mm?

*April 27, 2014*

**Statistics**

A simple random sample of 27 adult mice has a length standard deviation of 0.66 mm. Using a 0.10 level of significance, does it appear that these mice come from a population with a length standard deviation of 0.87 mm?

*April 27, 2014*

**Statistics**

18.3

*April 27, 2014*

**Statistics**

18.3% smoke

*April 27, 2014*

**Statistics**

What part? That's exactly how it's written on the homework

*April 27, 2014*

**Statistics**

One survey by the American Medical Association showed that among 785 randomly selected people who completed four years of college, 81.7% do not smoke. Use a 0.01 significance level to test the claim that people who completed four years of college are more likely to not smoke ...

*April 27, 2014*

**math**

How do you find the sum of the mode from each set of data? Set A: ( 4,9,7,2,4 ) Set B: ( 11,6,4,6,2 ) Set C: ( -3,2,9,-3,-3)

*April 23, 2014*

**Chemistry**

What mass of octane must be burned in order to liberate 5410 kJ of heat?

*April 13, 2014*

**Math Help? Check my answers.**

1. A spinner is divided into 10 equal sections numbered from 0 to 10. You spin the spinner once. What is P(divisible by 3)? 1/3 1/2 2/5 3/10** 2. A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. You choose a marble, ...

*April 9, 2014*

**health**

In the United States, the most at risk and highest reported rates of infection of gonorrhea are among sexually active ________. "All of the above" isn't a choice it should be "A and B" correct answer is D. "A and B"

*April 2, 2014*

**Physics**

The figure(Figure 1) shows a solid metal sphere at the center of a hollow metal sphere. Assume that E=1.2×104N/C. What is the total charge on the exterior of the inner sphere?

*March 11, 2014*

**Physics**

An electric dipole is formed from two charges, ±q, spaced 1.00cm apart. The dipole is at the origin, oriented along the y-axis. The electric field strength at the point (x,y)=(0cm,10cm) is 320N/C . What is the charge q? Give your answer in nC. What is the electric field...

*February 21, 2014*

**math**

A rectangular fish pond is 21ft(squared) in area. If the owner can surround the pond with a 20 foot fence, what are the dimensions of the pond?

*February 19, 2014*

**AP Chemistry**

A solution is made by mixing exactly 500 mL of 0.167 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO-, OH-, and Na+.

*February 16, 2014*

**4th grade science**

I do not know

*February 10, 2014*

**Math**

Kyle had 5/7 lb of birdseed.each bird feeder hold 1/5 lb of seed.can Kyle fill 5 bird feeders

*February 5, 2014*

**physics**

a wooding block of mass 7.6kg rest on a rough horizontal surface if the surface is 8N calculate the coefficient of friction

*November 17, 2013*

**Chemistry**

What is the theoretical yield of ethyl chloride in the reaction of 19.2g g of ethylene with 48g g of hydrogen chloride?

*November 3, 2013*

**Water - Math Question**

aw, guys someone help me please??

*October 19, 2013*

**Water - Math Question**

This question is related to water footprint calculation. I have no idea how to go about this, if anyone could point me in the right direction, I'd be forever grateful! Background info: The water footprint of the resident of a Blue Sea riparian country (92 million residents...

*October 19, 2013*

**Math Explanation problem**

Adding partial products help you solve a multiplication problem because you can eliminate steps in the problem and can also check the answer.

*October 1, 2013*

**statistics**

32

*September 16, 2013*

**algebra 2**

Teaneck High had an enrollment of 11050 in 1990 and an enrollment of 13390 in year 1998. What is the predicted enrollment of Teaneck High in 2018 if we assume a linear model?

*August 24, 2013*

**math**

Biologists have noticed that the chirping of crickets of a certain species is related to temperature, and the relationship appears to be very nearly linear. A cricket produces 119 chirps per minute at 67 degrees Fahrenheit and 172 chirps per minute at 88 degrees Fahrenheit. ...

*August 24, 2013*

**U.S. Government**

How is the American Government Organized and their functions? - I have to write a 5 paragraph essay and I need help researching. - Do you know a website I can get information? P.S ; I do not have a book. I'm taking an online class and I have to start/finish it by tomorrow...

*July 23, 2013*

**math**

How many pounds of birdseed are used to fill each feeder? draw a tape diagram to show your thinking

*July 16, 2013*

**Government**

i don't have a text to study. its an online class.

*July 9, 2013*

**Government**

1. The U.S. Constitution's Article I, Section 1 created the office for the U.S. president. A) True B) False 2. The term of office for a House member is two years. A) True B) False 3. Two requirements for members of the House are that they must be 25 years of age and a ...

*July 9, 2013*