Tuesday

January 24, 2017
Total # Posts: 2,604

**chemistry**

Consider the reaction: 2H2S(g)⇌2H2(g)+S2(g) An equilibrium mixture of this reaction at a certain temperature was found to have [H2S]= 0.542M , [H2]= 2.64×10−2M , and [S2]= 7.54×10−3M . What is the value of the equilibrium constant at this ...

*December 5, 2014*

**chemistry**

Write an equilibrium expression for each chemical equation involving one or more solid or liquid reactants or products. HCHO2(aq)+H2O(l)⇌H3O+(aq)+CHO−2(aq) Use A for [HCHO2], B for [H2O], C for [H3O+], D for [CHO−2].

*December 3, 2014*

**CHEMISTRY**

A solution with a pH of 7 has a [OH1-] of? 0M or 7M???????????????????

*December 3, 2014*

**chemistry**

7M??

*December 3, 2014*

**chemistry**

A solution with a pH of 7 has a [OH1-] of? 1 x 10-7 M?? Is that correct

*December 3, 2014*

**Physics**

The engine of an automobile develops 176 hp when rotating at a speed of 1340 rpm. What torque (in foot-pounds) does it deliver? I tried using some kinematic equations, but that didn't work at all. Then I tried doing something where I would take an integral, but then I don...

*December 3, 2014*

**Science Help!!!!**

-sophia its not help when you just ask what the answer is

*December 2, 2014*

**Math**

How to check 4=-2(4.5p+25) so the answers both check out and equal each other?

*December 1, 2014*

**Calculus**

Find dy/dx if x^2+y^2=2xy A. x/(x-y) B. (y+x)/(y-x) C. 1 D. -x/y E. None of these

*November 30, 2014*

**AP calc**

. If f(x) = {x^2+3x-1, x<=2 and -3bx+3, x<2 , find the value of b in order for f to be continuous

*November 30, 2014*

**AP Calculus**

Find f'(x): f(x)=(x^2-3x)/x^2 A. 2x-3/x^2 B. 2x-3/2x C. 1-(3/x) D. 3/x^2 E. None of these I get confused on the simplifying part.

*November 30, 2014*

**Math**

Which of the expressions is not equivalent to 1/25? A. 5^3×5^-5 B. 5^-1×5^-1 C. 5^-3×5 D. 5^-2×5^4

*November 30, 2014*

**AP Calculus**

Find limit as x approaches 1 5/(x-1)^2 A. 0 B. Negative infinity C. 5/4 D. Infinity E. None of these

*November 30, 2014*

**Calculus**

If f(x)=x^2+1 and g(x)=2x-1, find d/dx[f'(g(x))] at x=1 A. 2 B. 6 C. 4 D. 0 E. None of these

*November 30, 2014*

**Calculus**

Which of the following describes the graph of y=|2x+6|? A. Only continuous B. Only differentiable C. Both A and B D. Not continuous, not differentiable E. Constant

*November 30, 2014*

**science**

please anyone helppppppppp

*November 25, 2014*

**science**

explain how mutations in dna affect the traits of an individual

*November 25, 2014*

**Math**

7b - 2 = 1b + 10

*November 25, 2014*

**Language Arts**

ms sue could you please get off this site if i agree is all you are going to say

*November 24, 2014*

**chemistry**

The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 8.56× 10–10 cm3·molecule–1·s –1 at 298 K. convert to units of M-1 s-1. convert rate constant to units of...

*November 23, 2014*

**Math!**

2/3 × 3/5

*November 20, 2014*

**art**

Yes, the correct answer is A.

*November 20, 2014*

**Math**

Check for 2/3(k+8)=52

*November 19, 2014*

**Math**

-6(m+1)=24

*November 19, 2014*

**chemistry**

I figured it out! Thank you so much, I really do appreciate it.

*November 19, 2014*

**chemistry**

An ethylene glycol solution contains 18.2g of ethylene glycol (C2H6O2) in 85.4mL of water. Calculate the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)

*November 19, 2014*

**chemistry**

So would it be Delta T = i*Kf(0 degrees C)*1.40 Delta T/Kf *1.40v= i?

*November 19, 2014*

**chemistry**

Benzene is a carcinogenic (cancer-causing) compound. A benzene-contaminated water sample contains 3.1×10−5% benzene by mass. What volume of the water in liters contains 225mg of benzene? (Assume that the density of the solution is 1.0 g/mL.)

*November 19, 2014*

**SpanishiA**

1.estoy 2.están 3.está 4.butterflies

*November 19, 2014*

**statistics**

70% of 8 students would be 5.6, so estimate either 5 or 6

*November 18, 2014*

**calc**

Is the gradient of a function basically like the slope field. Also what is a conservative vector field. I know the definition but I'm having trouble visualizing it Thanks

*November 17, 2014*

**Math 6th**

Andy ran a 5-kilometer race in 40 minutes. If Andy maintains that same place, how many kilometers did Andy run In 1 hour?

*November 16, 2014*

**math**

x=32

*November 15, 2014*

**Social Studies HELP!!**

What can we infer from "they ought to get the sane treatment as Mr. Carlisle? What did Mr. Carlisle do? What was his treatment?

*November 13, 2014*

**chemistry**

A gas mixture is composed of 4.3 grams of hydrogen (density at STP = 0.089 g/L) and 2.9 grams of helium (density at STP = 0.179 g/L). What is the percentage (v/v) helium in the mixture? If v/v = Volume of gas/total volume how would we find the volume of both of the gases?

*November 13, 2014*

**chemistry**

Would the answer be .25596? 8.1/100= .081 .081*3.16= .25596

*November 13, 2014*

**chemistry**

How many liters of CO2 gas are contained in a 3.16 liters of a gas mixture which is 8.1% (v/v) CO2? They never gave us the formula or a process to figure this out in class. Will you please help?

*November 13, 2014*

**Physics**

How fast is an object traveling after 3seconds if its terminal velocity is about 35 m/s.?

*November 12, 2014*

**Physics**

What is the horizontal component of the force of an object sloped at a 45° angle. pulling with a force of 110N.

*November 12, 2014*

**Math**

The number of meters decreased by 25.6 is 84.3 meters.

*November 12, 2014*

**Math HELP!**

Please help me write an equation for these two: Ten fewer than the number of band instruments is 47 instruments. The number of meters decreased by 25.6 is 84.3 meters

*November 12, 2014*

**physics**

An unidentified flying object is cruising 30.0° north of east at a speed of 2132 km/h. How fast is it moving to the north?

*November 12, 2014*

**math**

Is lun right???

*November 11, 2014*

**Social Studies**

What did Samuel Adams and Paul Revere do in the Boston Massacre?

*November 10, 2014*

**Math**

a lab has two bacterial cultures. culture a contains 8×10^4 bacteria and culture B contains 4 × 10^6 bacteria. How do the two cultures compare in size?

*November 10, 2014*

**Math**

Choose a number. Multiply by 2. Add 6 to the product. Divide by 2. Then subtract 3. What is the answer? Repeat this process using two different numbers.

*November 9, 2014*

**physics**

A 2.7 kg object falls from a tower. It experiences 2.3 N of air resistance. What is the acceleration?

*November 8, 2014*

**algebra**

would multiplying 3 negative integers always equal a positive integer?

*November 7, 2014*

**math**

what about 3 negatives? would the product always be positive?

*November 6, 2014*

**math**

is a negative times a negative ALWAYS positive? or can it be negative as well?

*November 6, 2014*

**please help! algebra**

find the next two numbers in the pattern: -12, 60, -300, 1500

*November 5, 2014*

**History**

1.A 2.C 3.D 4.C 5.B 6.B 7.D 8.C 9.B 10.C These are the correct answers.i got a 100 with these

*November 5, 2014*

**Math**

X/4 + 7 = 3

*November 3, 2014*

**Math**

-1.4b + 10 = (-18)

*November 3, 2014*

**Math**

2/3y + 6 =15

*November 3, 2014*

**Art**

connexus?

*November 3, 2014*

**chemistry**

What is the volume occupied by 0.252mol of helium gas at 1.35atm and 305K ?

*October 31, 2014*

**chemistry**

A bag of potato chips contains 575mL of air at 25.0∘C and a pressure of 765mmHg . Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 458mmHg and the temperature is 10.0∘C?

*October 31, 2014*

**chemistry**

Thank you. That helped a lot.

*October 31, 2014*

**chemistry**

A balloon contains 0.126mol of gas and has a volume of 2.78L. If an additional 7.0×10−2mol of gas is added to the balloon, what will its final volume be?

*October 31, 2014*

**chemistry**

Calculate the concentrations of all species in a 1.22 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 M and Ka2 = 6.3× 10–8 M.

*October 30, 2014*

**Math**

How did the Proclamation of 1763 attempt to protect the Native American rights and land?

*October 28, 2014*

**Math**

The slowest mammal on Earth is the sloth. A sloth might move along a tree at a maximum rate of just 3 ^-1m each minute. At this rate, how long will it take a sloth to climb a tree that is 33 m tall?

*October 27, 2014*

**college algebra**

C(x)=.80+.33x

*October 27, 2014*

**Science HELP!**

Bbb is right

*October 25, 2014*

**Mr. Anonymous**

Max = (-5/3,0) Min = (0,0)

*October 24, 2014*

**Chemistry**

How many moles of ammonia are in 1.20E25 molecules of ammonia.

*October 23, 2014*

**French**

You can say "On dit X" (One could say X) or "Le mot est X" (The word is X)

*October 23, 2014*

**Math**

Write each expression using a single exponent. Xy^5 • x^3 y^7

*October 22, 2014*

**science**

-A is right guys. ONLY APPLIES TO C0NNECTI0NS ACAD3MY

*October 21, 2014*

**Physics**

The blades of a ceiling fan have a radius of 0.393 m and are rotating about a fixed axis with an angular velocity of +1.36 rad/s. When the switch on the fan is turned to a higher speed, the blades acquire an angular acceleration of 1.82 rad/s2. After 0.475 s have elapsed since...

*October 18, 2014*

**Physics**

A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 54 cm and is wound around the top at a spot where its radius is 2.2 cm. The thickness of the string is negligible. The top is initially ...

*October 18, 2014*

**Chemistry**

or rather were questions

*October 18, 2014*

**Chemistry**

1)What could have caused the impurity in the sodium hydroxide solution? 2)Why was it necessary to dilute the hydrochloric acid before carrying out the titration? This was a question from a titration practical in which we had to dilute HCL then use that along with 25cm3 of NaOH...

*October 18, 2014*

**Physics**

A floor polisher has a rotating disk that has an 11-cm radius. The disk rotates at a constant angular velocity of 1.1 rev/s and is covered with a soft material that does the polishing. An operator holds the polisher in one place for 43 s, in order to buff an especially scuffed...

*October 15, 2014*

**Math**

(-3) ^-4 5 ^-2 =?

*October 15, 2014*

**Language Arts**

Update from the end of november, it is still B A D C 4/4.

*October 14, 2014*

**L.A. HELP**

Connection whiz is 100% right. thanks!

*October 14, 2014*

**Math**

How to solve 2^-1/5^2 ?

*October 14, 2014*

**Help: Social Studies (Please check my answers)**

Your a fake.

*October 14, 2014*

**Math**

3^-2/n and 7ab^-2/3w .

*October 13, 2014*

**please help english**

To anyone who wants the CORRECT answer, its "The girls love to swim at Julie's house" not what "writeacher" said, i just took the quiz and this was the correct answer (even though this post is dead)

*October 13, 2014*

**please check my english**

Leah is right, she has the correct answers for "The Destructors Part 1" quick check

*October 13, 2014*

**chemistry**

A 300mL solution was made by dissolving 5.0g of MgCl2 in water. What is its molarity?

*October 11, 2014*

**Algebra**

A person has 29 1/2 yards of material available to make doll outfits. Each outfit requires 3/4 yard of material. a: How many outfits can be made? b: How much material will be left over?

*October 11, 2014*

**Math**

Melanie has 84 muffins, which he needs to box up, 9 of which are blueberry, into dozens. How many boxes does she need?

*October 6, 2014*

**Math**

Tim has forty five books. Jason has forty two times more books than Tim. How many books does Jason have?

*October 6, 2014*

**SS**

New France is _____ of the Appalachian Mountains.

*October 5, 2014*

**statistics**

A poll asked 500 adults if they thought Ontario should produce more, less or maintain current production of ethanol. -160 people responded "more ethanol production" -136 people responded "less ethanol production" -155 people responded "maintain current...

*October 5, 2014*

**Physics**

Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

*October 3, 2014*

**Physics**

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 20.0° below the horizontal. A 40.0-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts? (b) ...

*October 3, 2014*

**Physics**

But how do you go about finding time since it is not given and you are only given a magnitude of the force and not the velocity

*October 3, 2014*

**Physics**

A golf club strikes a 0.041-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball's motion, has a magnitude of 6400 N, and is in contact with the ball for a distance of 0.012 m. With...

*October 3, 2014*

**Physics**

Suppose in the figure blow that +1.00 103 J of work is done by the force F with arrow (magnitude = 30.0 N) in moving the suitcase a distance of 51.0 m. At what angle θ, counterclockwise from the x-axis, is the force oriented with respect to the ground?

*October 3, 2014*

**Social Studies (SS)**

Sorry I accidentally put math but can you please Describe George Washington's expeditions into French territory.

*October 2, 2014*

**science**

@boo what do you meamn by 3

*October 2, 2014*

**english**

nvm got it!

*October 1, 2014*

**english**

help on thesis writing

*October 1, 2014*

**Math**

Hi, I have two questions here I need help with, thank you in advance. 1. Peggy scored 68 on her first three tests of the term. What would she have to score on the fourth test to have an average of 70 on the fourth test? 2. If you were to place the digits 1,2,4,8,9, one per box...

*October 1, 2014*