Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 46

**chemistry 2**

I figured it out. Thank you!

**chemistry 2**

Titration of 50.0 mL of acetic acid reaches equivalence after delivery of 22.5mL of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH adition of 20.0 mL of NaOH? What vol...

**Math**

Yes it did....I kept multiplying 7*6 before I would divide....thanks! Where can I find those additional rules?

**Math**

Jai what answer did you get when you put the parentheses around 3+4?

**Math**

Insert parentheses to make the equation true. 14=50-42/3+4*6

**Maths**

Two aircraft are flying toward each other , both are flying at a spped of 450 mph. With a distance of 45 miles between them, how long will it take before the aircraft meet? The answer is apparently 2 minutes 30 seconds. Though I dont know how this was worked out? Many Thanks

**Maths**

The answer is apparently 2 minutes and 30 seconds but I cant work out how to figure this out thanks.

**Maths**

Two aircraft are flying toward each other , both are flying at a spped of 450 mph. With a distance of 45 miles between them, how long will it take before the aircraft meet?

**math **

Joe says that knowing 2x3 helps him know 4x6 is he right explain

**Simplify **

Simplify expression tan(-x)csc(x) ??? Cos x -cos x Sin x Sec x -sec x

**Calculus **

Which is the correct cofunction identity for (tan theta?) A csc(90degrees - theta) B sec (90degrees - theta) C sin (90degrees - theta) D cos (90degrees - theta) E cot (90degrees - theta)

**Physics**

A certain spring has a spring constant of 165 N/m. A 20kg mass is attached to the end of the spring. While the mass is at the equilibrium position, it is given a velocity of 8m/s downward. What is the total energy of the system, and aacceleration of the system when it is at th...

**Economics**

A firm uses a single plant with costs C = 160 + 16Q + .1Q2 and faces the price equation P = 96 - .4Q. a. Find the firm’s profit-maximizing price and quantity. What is its profit? b. The firm’s production manager claims that the firm’s average cost of production ...

**AP physics**

Lucy is using a programmable treadmill. She inputs a top speed into the treadmill and presses "start." The treadmill accelerates from rest at 0.100 m/s2 until it reaches that speed, after which it stays at that constant speed. Later, when she is getting tired, she hi...

**Pre-Cal**

Find the domain of the function. sqrt of x^2-9

**Chemistry**

Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to from Al2O3 at 25 celcius and 1 atm. The delta enthalphy change in the heat of formation for Al2O3 = 1676 KJ/mol 4Al(s) + 3O2(g) --> 2Al2O3(s)

**Art and Humanities: Twentieth Century and Beyond**

Prepare and conduct interviews with two people about their definition of happiness, how they gained this view, and whether they feel happiness is achievable. Choose two people who vary in age and experience. Only one of the subjects can be someone you know well. This is an opp...

**physics!**

in the frame of the car, the ball comes in with 39 m/s speed, and bounces back at 39 m/s in the other direction. In the observer frame we need to add the 18 m/s relative speed of the car, and get 57 m/s

**quantitative decision making**

james and john invested ¥700 and ¥300 respectively, at the end the of one year, they divided their profits such that a third of the profit is divided equally for the efforts they have put into the business and the remaining amount of profit is divided in the ratio of t...

**quantitative decision making**

james and john invested ¥700 and ¥300 respectively, at the end the of one year, they divided their profits such that a third of the profit is divided equally for the efforts they have put into the business and the remaining amount of profit is divided in the ratio of t...

**psychology**

what are the four goals of psychology and one example for each?

**Science**

25 mL sample of KNO3 solution was diluted to 1.000x10^3 mL. The concentration of the final solution is .00383 M. Calculate the concentration of the original solution

**Science**

if 1.2 g of sodium metal is reacted with 2 mL of H20, how many grams of NaOH will be produced

**physics**

A car starts from rest and accelerates uniformaly at the rate of 0.98m/s in 1hr.what is its final velocity? A car starts from rest and reaches a velocity of 40m/s in 1minutes..(a)what is its acceleration?(b) If its acceleration remains constant,what will its velocity be in 15 ...

**physics**

A motorist increase speed from rest and in 21s reaches am a speed of 20km/hr.What is (a)the uniform acceleration in ms-2?(b)the distance covered in the time interval?

**Bio**

im stuck on these questions for my study guide Please help! i dont want links. thanks 1. Which of the follwoing would be an appropriate measure of the phenotypic variation of a trait in a population? a) the mean of the trait in the population b) the standard deviation of the t...

**Math**

A 1 pound bag of candy containing 502 piecescost 16.8 cents per ounce. What is the cost of 1 piece of candy?

**Chemistry**

How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution? A. none of these B. 7.60 C. 475 D. 0.475

**science**

Explain why ionic compounds are formed from the left side of the periodic table reacts with nonmetalfrom the right side.

**calculus help please**

At the instant when the radius of a cone is 3 inches, the volume of the cone is increasing at the rate of 9 pi or 28.27433388 cubic inches per minute. If the height is always 3 times the radius, find the rate of change of the radius at that instant?

**Chemistry**

120 * 1.5/3.5 = 51.4 ml

**intro business**

help serve food

**chemistry**

Solutions of sodium hydroxide cannot be kept for very long because they absorb carbon dioxide from the air , forming sodium carbonate. the unbalanced equation is NaOH(aq) + CO2(g) = Na2CO3(aq) + H2O(l) calculate the number of grams of carbon dioxide that can be absorbed by com...

**Literary Analysis and Composition**

thanks for the answers got a B+

**spanish**

Song title - he drinks tequila she talks dirty in Spanish by Sammy Kershaw and Lorrie Morgan. Available n You Tube

**physics**

Use the formula for center of mass. (∑ distance * mass) / total mass = center of mass The masses are what each man is holding, the distance is where each man is from some origin. If you set the origin on one of the men, his distance * mass is 0. Since we know the center ...

**History**

Which of the 1st explorers made one of the 1st maps of the North American coast?

**Physics center of gravity**

29500

**other**

The Fan

**Calculus (Urgent Help)**

Not only that, but you are wrong on number 6. A minimum value of f'(x) at x = c does NOT imply an extreme value, although the reverse is certainly true if the sign changes from - to +. f''(x) could be undefined at f'(c) which would make it a critical value of f...

**Writing**

What is introduction and how to write it?

**ethics**

Trends in immigration will continue to shape the face of the United States. What will this face look like in the year 2050? Here are the results of a Google search for US population projection 2050: http://www.google.com/search?q=US+population+projection+2050&rls=com.microsoft...

**Math**

The Parent group of the local head start promoted recycling in their neighborhood one saturday in march by distributing sets of blue and green recycling bins to grocery shoppers at central market place. Out of the 248 shoppers who stopped by head start's recycling informat...

**english- mood/tone**

tks a lot

**Chemistry.**

Please explain how to solve this question, and why you use your method to solve it. I am very very stuck. Gold is present in seawater to the exteen of 0.15mg/ton. Assume the density of the seaswater is 1.03g/mL and determine how many Au atoms could concievably be extracted fro...

**Punctuating Sentences check please**

what is punctuating sentences?

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