Sunday

October 23, 2016
Total # Posts: 592

**Chemistry**

Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25unknown_prefixC in your answer.) (a) the dissociation of solid magnesium hydroxide in water

*April 2, 2014*

**Chemistry**

Write a balanced chemical equation that represents the self-ionization of water. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25°C in your answer.)

*April 2, 2014*

**Chemistry**

How many milliliters of 0.326 M HCl would be required to titrate 5.48 g KOH?

*April 1, 2014*

**Math**

GB=7*9*12=756 cu. in. LB=10*10*15=1500 cu in. 1500-156=744 cu in. Hope this helps everyone :)

*March 30, 2014*

**Chemistry**

What are the molality and mole fraction of solute in a 32.3 percent by mass aqueous solution of methanol (CH3OH)? molality = ?m mole fraction =

*March 13, 2014*

**science**

Besides if your not cheating then why are you on this site..?

*March 12, 2014*

**science**

Looking for only the answer is cheating, seeking for help is seeking for help, (If) they are cheating, its their choice, and you must not be very mature if your going to tell on them.

*March 12, 2014*

**chemistry**

In the laboratory a student finds that it takes 20.7 Joules to increase the temperature of 11.0 grams of solid platinum from 20.5 to 35.8 degrees Celsius. What is the specific heat of platinum she has measured.

*March 11, 2014*

**science**

I got 100% too! Thanks you!

*February 27, 2014*

**Chemistry**

Possible Sources of error in a reaction or sodium bicarbonate and acetic acid. Also known as baking soda and vinegar.

*February 25, 2014*

**Chemistry**

When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 34.0 g copper(II) oxide is used?

*February 24, 2014*

**Chemistry**

In 1901, Thomas Edison invented the nickel-iron battery. The follwing reaction takes place in the battery. Fe(s) + 2 NiO(OH)(s) + 2 H2O(l) Fe(OH)2(s) + 2 Ni(OH)2(aq) How many mole of Fe(OH)2, is produced when 3.70 mol Fe and 6.95 mol NiO(OH) react?

*February 24, 2014*

**SCIENCE HELP ASAP! :)**

I took the quiz- I'm from connections- but the answers are 1.C 2.B 3.C 4.A 5.C 6.A 7.B 8.D 9.A 10.A Welcome :)

*February 19, 2014*

**chemistry**

a 2.52-g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 4.23 g of CO2 and 1.01 g of H2O as the only carbon and hydrogen containing products respectively. Another sample of the same compound, of mass 4.14 g, ...

*February 15, 2014*

**math**

In the basketball game, Sarah made three times as many 2-point shots as 3-point shots. She made 8 shots in all. How many 2-point shots did she make?

*February 13, 2014*

**SCIENCE --- CHECK MY WORK PLS**

Got em! Thank youuu!

*February 3, 2014*

**Science**

Thank youuuu :D

*January 29, 2014*

**Math #rd grade**

Thank you! It was worded so weird I didn't know what they wanted. : )

*January 14, 2014*

**Math #rd grade**

Bryan has 3 nickels, 3 dimes, and 2 quarters. What fraction of the coins is either a dime or a quarter? There is a space for only 1 fraction answer.

*January 14, 2014*

**8th Grade Earth Science Help?**

What was the answer?

*January 14, 2014*

**Spelling**

What is the antonym of brandishing? a) furbishing b) concealing c) defacing d) galvanizing

*January 8, 2014*

**us history**

How did immigrants regard public education? a. as an aid to assimilation b. as a threat to cultural heritage c. as a path to advancement d. all of the above

*November 25, 2013*

**English**

I have the sentence: Kyle seems calm despite his situation. Kyle is the subject, seems is the being verb, calm is a subject complement adjective that describes Kyle. My question is, is "...despite his situation" an adverb phrase? Is it describing calm or seems? Thanks,

*October 25, 2013*

**math**

In a class of 40 students, 27 like math and 25 like Filipino. At most how many students do not like at least one of these subjects?

*October 22, 2013*

**chemistry**

a tuning fork produces a sound of musical note middle C. It moves back and forth 256 time each second. What is the frequency of the tuning fork?

*October 21, 2013*

**grammar**

can you explain the predicate and complete predicate in a sentence

*October 3, 2013*

**Geography **

Why do the trees drop their leaves in the fall?

*October 2, 2013*

**7th Grade**

What we're learning? mostly cells and living organisms- pretty insane stuff (:

*September 16, 2013*

**7th Grade**

Hi, In science we're mostly earning about everything inside your body like cells and chromosomes.

*September 16, 2013*

**Geometry**

The peremiter of triangly rst is 40 what is the perimeter of triange xyz

*September 8, 2013*

**calculus**

After solving with A=(-1,2) x^2+2x^2+x+1 got 119/12a pls where did i get it wrong. And with -[(-55)] x^2-25dx i got -50 pls am i correct

*September 7, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^2-25 for (-5) is less than or equal to x less than or equal to 5

*September 6, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3 and the straight line y=x

*September 6, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3+2x^2+x+1 between x=-1 and x=2

*September 6, 2013*

**calculus**

Determine l= 2e^xdx, given that l=50.2, when x=3

*September 6, 2013*

**calculus**

int e^5xsin3xdx =

*September 6, 2013*

**calculus**

int dx/3sinx+4cosx dx =

*September 6, 2013*

**calculus**

int x^2/(x-2)(x^2+1)dx

*September 6, 2013*

**physics **

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?

*September 5, 2013*

**geometry**

Given that r1=6i-8j+2k,r2=4i+5j+7k,r3=-2i+j+6k is a vector. Find r1r2,r2r3,r3r1(a)30,21,-8(b)26,23,8(c)24,19,-7(d)19,27,7

*August 30, 2013*

**geometry**

if U=i+3j-2k and V=4i-2j-4k are vectors find U.V, 3U+V& (2U+V).(U-2V) (a)6,10,4(b)4143(c)11,4,5(d)5,11,6

*August 30, 2013*

**physics**

Two charges Q 1 =500/mu(C) and Q 2 =100/mu(C) are located on the XY plane at the positions r1=3/vec(j)m and r2=4/vec(i)m. Find the force exerted on the Q2(a)14.4/vec(i)+10.8/vec(j)(b)14.4/vec(i)-10.8/vec(j)N(c)10.8/vec(i)-14.4/vec(j)N(d)10.8/vec(i)+14.4/vec(j)N

*August 28, 2013*

**physics**

Two large horizontal metal plates are separated by 4mm. The lower plate is at a potential of (-)6v.What potential should be applied to the upper plate to create field strength of 4000v/m upwards in the space between the plates?(a)(+)22(b)(+)10(c)(-)10(d)(-)22

*August 28, 2013*

**World History**

I agree that it was B. The Rise of Religion.

*August 26, 2013*

**Probablity**

0.18

*August 26, 2013*

**Social Studies**

the farming are different because in new England in the winter its very cold so they can't pant in the winter, but in southern colonies it is mild in the winter so the can farm a little.

*August 23, 2013*

**Math**

nn jhb

*August 20, 2013*

**Math**

tom had 18 comic books , while Diane and Helen had none. Tom gave 1/3 of the comic books to Diane who passed 1/3 of these books along to Helen. If Tom then gave Helen 1/3 of the books he had left, how many comic books did Helen receive from Tom and Diane

*July 3, 2013*

**Math**

An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour? a. t-1 b. d/t-1 c. d/t+1 d. d/t-1 e. d/t+1

*July 2, 2013*

**Math**

Each plant of a certain variety yields 50 seeds in the early fall and then dies. Only 40 percent of these seeds produce plants the following summer and the remainder never produce plants. At this rate, a single plant yielding seeds in 1986 will produce how many plants as ...

*July 1, 2013*

**Language barriers**

Females are passive

*June 28, 2013*

**Ganguage barriers**

If a child displays discriminatory behavior in the classroom, one should

*June 27, 2013*

**Language and other barriers**

An example of an exceptional child is one who

*June 27, 2013*

**World Geography**

D. Stopping French nuclear testing in the region. ~ I just took the test ~

*June 19, 2013*

**Technology**

Non system disc means

*June 17, 2013*

**Technology**

If you want to teach whole classes how to use computers, where is the best place to locate the computers?

*June 17, 2013*

**math**

At a point on the ground 80ft from the base of a tree,the distance to the top of the tree is 11ft more than 2 times the height of the tree. find the height.

*June 12, 2013*

**Physics**

What happens to the momentum of the truck if sand leaks at a constant rate through a hole in the truck bed while the truck maintains a constant velocity?

*May 26, 2013*

**life orientation**

6 ways in which earthquake can impact negatively on one's health

*May 14, 2013*

**math**

0.21 x 63 = 13.23

*May 9, 2013*

**Math**

A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?

*May 8, 2013*

**Math**

My question was: "How many students can be chosen from a class of 16 to represent their class at a banquet?" If you could give me the answer, I'd be thankful.

*April 17, 2013*

**Chemistry**

When I solve for H^+ I put 1.7 x10^-3 x 0.26. I got 4.42 x 10^-4. My pH is 3.35. Is that right?

*April 16, 2013*

**Chemistry**

Substance X (MW=356gm) is a weak acid. Its Ka is 1.7x10^-3. Calculate pH of725ml of the following solutions: a)Containing 0.187 mol of substance x b)containing 127gm of Substance x I have been trying to figure this problem out for hours now and do not get it. Please help me ...

*April 16, 2013*

**Chemistry**

Does that mean that I do not need to do an ICE table but just use the HH equation?

*April 16, 2013*

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

*April 16, 2013*

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)

*April 16, 2013*

**Chemistry**

Three metals P,Q and R form three ionic solids with three nonmetals X,Y, ands Z respectively as follows P2X, QY2, and RZ3. If their molar solubilities are the same, how are their Ksp values related? Please not only explain but write the respective dissociation.

*April 16, 2013*

**algebra 2 (permutations & combinations)**

from a standard deck of 52 cards, how many different five-card hands can be drawn?

*April 10, 2013*

**science**

tundra

*April 4, 2013*

**Math**

What property is this? 4(7+9)=(4x7)+(4x9)

*April 2, 2013*

**Math**

One half of 9.76

*April 2, 2013*

**Math**

The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?

*April 2, 2013*

**Math**

What is a attribute?

*April 2, 2013*

**Chemistry**

When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.

*March 29, 2013*

**Chemistry**

You have two buffer solutions 1) weak acid and its conjugate base 2)weak base and its conjugate acid. Write explicitly ( considering generic formula for acid and base) the equations of neutralization when you: a) add strong acid and strong base 1) b) add strong acid or strong ...

*March 29, 2013*

**Math**

6 quarters, 4 dimes, 3 nickels, 10 pennies. what is the probability you will get at least one of each coin in change of 1 dollar

*March 26, 2013*

**chemistry**

what is the total heat lost if you have 8 grams of copper and the temperature changed from 43°C to 36°C

*March 24, 2013*

**Statistics**

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is the sample ...

*March 22, 2013*

**NJHS (essay)**

hi, i'm currently applying for the national junior honor society, and i'm working on my essay. any ideas what i should include??? ps. i have no leadership experience and the section is blank! D:

*March 20, 2013*

**Statistics**

Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three free throws. Find the...

*March 17, 2013*

**geometry**

The answers are 1-B 2-C 3-D 4-A 5-C 6-B 7-B! I took the quiz so these answers are 100% accurate.

*March 16, 2013*

**social studies**

Are any of you from Wisconsin connections academy?

*March 11, 2013*

**Basic Math Venn Diagram**

Hi! Having a lot of trouble with this one problem. The venn diagram problem is n(U)-n(B). I realize I did not post the venn diagram, I just need to know how to solve that type of problem using a venn diagram! Help would be greatly appreciated. : ) Thank you so much!! God ...

*March 7, 2013*

**Math**

Thx that really helped😄😃😜😝👍👍❕👏🎓🆗🆕🔝🆒 freind bump🆙

*March 7, 2013*

**Math**

I don't know what 4r=96 means. Also I don't know what 51=3n means!😰😁😱😨📝HELP! It's due tomorrow

*March 7, 2013*

**Physics**

A uniform ladder of 5.0 m long and 12 kg is leaning against the wall (contact with the wall = point b, contact with the floor = point a). The height from the ground to point b is 4m . The wall is frictionless but the floor is not. A painter of 55 kg climbs 75% of the way up ...

*February 24, 2013*

**math**

Compatible numbers, bench mark fractions, round

*February 12, 2013*

**MATH**

if 5 times a certain integer ìs subtracted from twice the square of the integer the result is 63. find the integer

*February 8, 2013*

**Algebra 1**

In 1991, the federal minimum wage rate was $4.25 per hour. In 1997, it was increased to $5.15. Find the annual rate of change in the federal minimum wage rate from 1991 to 1997.

*February 7, 2013*

**Macroeconomics**

If the economy is at point C what is the cost of one more automobile? One more forklift?

*January 31, 2013*

**chemistry**

a sample of sulphuric acid is 95.7% by mass and has a density of 1.84g/cubic cm.calculate the mass of pure H2SO4 in a 2.00L bottle and volume of acid that contain 200g of pure H2SO4.

*January 26, 2013*

**math**

poop

*January 24, 2013*

**Environmental Biology**

Identify two different types of businesses or corporations (be as specific as possible) that receive subsidies, through which it could be argued that environmental damage is a result. Briefly describe the environmental damage for each.

*January 19, 2013*

**solid mensuration**

what is the area of a section bounded by a closed elliptical figure in which the major and minor segments measure 60 cm and 45 cm

*January 11, 2013*

**Physics...Help!!!**

given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.

*December 20, 2012*

**Economics**

If businesses believe consumption will increase six months from now, everything else held constant, and they begin to increase investment, what do you predict will happen to aggregate demand?

*December 10, 2012*

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

*November 19, 2012*

**Chemistry**

Devise a test to distinguish between Cu2+ and Co2+.

*November 19, 2012*