Friday

June 24, 2016
Total # Posts: 288

**Chemistry **

A solution of acetic acid, 1.0 mol L–1 CH3COOH, contains sodium acetate, NaCH3COO. The percent ionization of the above solution is 0.25%. The Ka for acetic acid is 1.8 x 10–5. Which of the following is the concentration of NaCH3COO in acetic acid? So i use ...
*June 9, 2016*

**Math**

You can also do 3x5x1 or any way because you will get the same answer.
*March 30, 2016*

**Math**

Multiply 5 and 3 and the answer to that multiply by 1
*March 30, 2016*

**Math**

That's a hint.
*March 30, 2016*

**Math**

I know that b and c are wrong because they are both division.if x is the total then you would subtract y or z from x. Since we are looking for z we have to subtract y from x. So which one has y being subtracted from x and equaling z.
*March 30, 2016*

**algebra**

Ok sorry that was my brother who put that🤗
*March 30, 2016*

**algebra**

The answer is the opposite of positive eleven
*March 30, 2016*

**Physics**

❓❔❓❔
*March 30, 2016*

**Math**

It's making it bigger or smaller so the size would change the volume
*March 30, 2016*

**Science**

I think the answer is d
*March 30, 2016*

**Science**

That helped a lot
*March 30, 2016*

**Science**

Thank you
*March 30, 2016*

**Science**

Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as ...
*March 30, 2016*

**History**

I think it's a But it's note or c because they are the same answer but rewritten.
*March 30, 2016*

**math**

The third letter of the alphabet
*March 30, 2016*

**Science**

Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as a...
*March 30, 2016*

**Algebra**

Don't know Sorry
*March 30, 2016*

**Math**

3.4
*March 30, 2016*

**Science**

Christina has a glass of water. Michael has a fruit juice drink. Both drinks are at room temperature, and both students add ice to their drink's. Condensation begins to on the outside of Christina's glass before Michael's. How can they state their observations as a...
*March 30, 2016*

**Math**

How many numbers are there in pie?
*March 30, 2016*

**Geometry**

Beats me
*March 30, 2016*

**Biology**

A protein is the whole structure put together.
*March 30, 2016*

**Chemistry**

what mass of NaCl do you need to make a 500mL of a 0.10M solution?
*March 28, 2016*

**math**

a three digit number with 8 ones and 4 tens. The sum of all my digits is 20. What number am i?
*March 6, 2016*

**algebra**

Find the value of y foe the given value of x and z Y=z+x
*February 15, 2016*

**Math**

5x-2y=4 X+2y=8
*February 10, 2016*

**math**

Which correctly renames 2/3 and 1/2 using a common denominator??
*January 20, 2016*

**physics**

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 83.0-kg water-skier has an initial speed of 5.9 m/s. Later, the speed increases to 11.4 m/s. Determine the work done by the net external force ...
*December 5, 2015*

**Physics**

A baggage handler throws a 16.0 kg suitcase horizontally along the floor of an airplane luggage compartment with an initial speed of 1.10 m/s . The suitcase slides 2.10 m before stopping.
*November 18, 2015*

**Math**

Use similar triangle to solve. A person who is 6 feet tall standing 140 feet from the base of a tree and the tree casts a 150 foot shadow. The person's shadow is 10 feet in length. What is the height of the tree?
*November 17, 2015*

**chemistry**

Which is the correct expression for Keq when the chemical reaction is as follows: N2 + 3H2 2NH3.
*November 16, 2015*

**words problems**

a car rental offers two plans-plan a $20per day and 12 cents per mile -plan b -$65 per day free unlimited mileage
*October 25, 2015*

**chemistry **

onsider the following reaction between sulfur trioxide and water: SO3(g)+H2O(l)→H2SO4(aq) A chemist allows 61.5 g of SO3 and 11.2 g of H2O to react. When the reaction is finished, the chemist collects 59.3 g of H2SO4.
*October 9, 2015*

**math**

The truck is 5m
*October 8, 2015*

**Physics**

A sports car skids to a stop, leaving skid marks 290 m long. If the coefficient of kinetic friction between tires and pavement is 0.80, how fast was the car going before the skid?
*October 4, 2015*

**math complex number**

Solve (-2+i) / (3-2i) and my answer is (-8-i) / 13. Correct?
*September 5, 2015*

**Geometry**

Can I please get some help? by+2/3=c, for y
*August 27, 2015*

**Science**

The lesion is located in the right thorax just lateral to the mid-saggital plane
*August 24, 2015*

**Algebra **

When 2 parents and 3 children visit a theme park the admission cost is $57. The cost is $33 for 1 parent and 2 children. Find the cost for 1 adult and the cost for 1 child?
*July 2, 2015*

**math**

kate and alan sell stereos. last month kate sold 24 more stereos than alan. together they sold 164. How many stereos did allan sell?
*April 22, 2015*

**Stats**

A professor believes that all Thursday sections are cursed and will always score lower on tests compared to Monday sections. To tests this he collects samples of test scores from these two sections. For Monday's section, the mean test score was 60, the estimated population...
*April 15, 2015*

**Math**

My 10th grade teacher gave us geometry homework and this problem has me stumped for sure. This rhombus has three interior angles: (5x-2)°, (8y+2)°, and (3x+22)° . We are supposed to find the value of x and y. I tried to use an equation by assigning the fourth angle...
*March 12, 2015*

**Statistics**

In a nominal data set, what is the preferred measure of central tendency?
*February 24, 2015*

**math **

a bicycle with a diameter of 24 inches is pedaled at a speed of 70 rotations per minute. find the distance the bike will travel in 48 mins
*February 18, 2015*

**physics**

A football is thrown with an initial upward velocity component of 13.5m/s and a horizontal velocity component of 16.5m/s How much time is required for the football to reach the highest point in its trajectory? How high does it get above the ground?How much time after it is ...
*February 18, 2015*

**Statistics**

A population has u=100 and o=20. If you select a single score from this population, on average, how close would it be to the population mean? Explain your answer. I don't understand the question itself. Please help.
*February 17, 2015*

**Math**

The following set of numbers respresents the average weekly scores of 9 preschoolers on a verbal aggression scale. 19.1, 18.9, 33.5, 18.7, 28.1, 31.5, 20.3, 30.1, 17.9 Consider this to be the entire population of scores. What is the standard deviation? I already have the mean ...
*February 16, 2015*

**fundamental skills**

a.
*February 15, 2015*

**fundamental skills**

When a teacher chooses learning objectives for a child, which question should be asked? A. What should Kelly learn next? B. Where's Kelly in the learning process? C. Do the plan and materials fit my lesson? D. Has Kelly learned what was taught? c.
*February 15, 2015*

**fundamental concepts**

Free play, eating a snack, painting, hearing a story, and so forth are related to which of the following learning concepts? A. Space B. Classification C. Size D. Time a.
*February 15, 2015*

**fundamental skills**

b.
*February 15, 2015*

**fundamental skills**

An 18-month-old child putting large beads in a plastic bowl and pouring them out is A. developmentally superior. B. normal and appropriate. C. developmentally inferior. D. abnormal. my answer I think is a.
*February 15, 2015*

**fundamental skills**

What must a teacher provide for an open-ended question to be successful? A. Heuristics B. Background information C. Discrepant events D. Disequilibrium my answer I think is b
*February 15, 2015*

**physics**

A warehouse worker pushes a crate along the floor, as shown in the figure (Figure 1) , by a force of 9.0N that points downward at an angle of 45∘ below the horizontal. Q1 Find the horizontal component of the push Q2 Find the vertical component of the push.
*February 12, 2015*

**Math**

Thank you so much! I had already asked this question before but they never explained to me how they got the 198. I really appreciate.
*February 3, 2015*

**Math**

A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new child's hyperactivity ...
*February 3, 2015*

**Stats**

How did you get 198?
*January 31, 2015*

**Stats**

A classroom of n = 10 children has a mean score of 17.200 on a measure of hyperactivity. One new child is added to the class, and the mean hyperactivity score for the resulting classroom including all the children is 18.000. Find the value of the new child's hyperactivity ...
*January 31, 2015*

**Math**

Ah, thank you. I really appreciate it. (:
*January 31, 2015*

**Math**

So my mistake was I didn't use enough digits after the decimal place?
*January 31, 2015*

**Math**

A pill weighs 70 mg. 7/9 of the pill is the active ingredient. How many milligrams are in the part of the pill that is not the active ingredient? So if 7/9 is active that means 2/9 is not active. I did 2 divided by 9 which gives me .22 I then multiplied 70 by .22 which gives ...
*January 31, 2015*

**Managemnet**

How to prepare an EFAS table for United Technologies.
*January 28, 2015*

**Fund. concepts skills**

Which of the following activities emphasizes the concept of comparing? A. Dividing pigs and cows into two separate groups B. Dividing farm and wild animals into two separate groups C. Discussing similarities and differences between stuffed and real animals D. Matching animals ...
*January 25, 2015*

**Fundamental concepts skills**

Putting objects together in a group based on a common criterion such as color or shape is called A. the same name. B. classification. C. lookalikes. D. match-ups. my answer is b.
*January 25, 2015*

**english - Compare and Contrast **

I would appreciate it if someone would be willing to look over my essay real quick. I just would like to know if I made any critical errors. Please do not correct them just point them out so I can fix it. Thank you very much. General instructions from my teacher: If you quote ...
*January 19, 2015*

**chemistry**

A 27.00mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1422M KOH solution. A volume of 40.22mL of KOH was required to reach the equivalence point. What is the concentration of the unknown H2SO4 solution? Any help would be greatly appreciated. (:
*December 14, 2014*

**chemistry**

Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate the atomic mass of ...
*December 14, 2014*

**chemistry**

Calculate the freezing point of a water solution at each concentration. 1.40m? What are the steps to calculate this?
*November 19, 2014*

**chemistry**

What is the molarity of ZnCl2(aq) that forms when 18.0g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 165mL .) Zn(s)+CuCl2(aq)→ZnCl2(aq)+Cu(s)
*November 19, 2014*

**chemistry**

V1= 38.8 n1= 1.60*10^-3 V2= 49.9 n2= ? How do we solve for n2 using avogadro's law?
*October 31, 2014*

**chemistry**

Yes, that is true but in my notes the professor never gave us a formula to figure it out. It is asking for an exact number of collisions.
*October 30, 2014*

**chemistry**

Imagine that you have an ideal gas in a 8.00L container, and that 2850 molecules of this gas collide with a square-inch area of the container at any given instant. If the volume is increased to 56.0L at constant temperature, how many collisions will occur per square inch of ...
*October 30, 2014*

**Chemistry**

Ho w
much
water
would
you
need
to
add
to
500
mL
of
a
0.3
M
calcium
nitrate
solution
to
make the
solution
0.1
M? A.
...
*October 17, 2014*

**chemistry**

Calculate the theoretical yield of alum if 0.200g of Aluminum was reacted with excess KOH and H2SO4? I don't even know how to start it. Please help. Also I wanted to say thank you for the help I've gotten from this website it has helped me a lot. I feel like I'm ...
*October 16, 2014*

**chemistry**

It's asking for it in nanoseconds is there a change in the formula?
*October 13, 2014*

**chemistry**

How long does it take light to travel each of the following distances 2462 mi, the distance between Los Angeles and New York. How do we calculate how fast light travels?
*October 13, 2014*

**chemistry**

Can you show me how you finished the equation?
*September 30, 2014*

**chemistry**

Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→ Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba? Express your answer as a chemical equation. Enter no reaction if no precipitate is formed. (How can we know if a solid is formed in the product?)
*September 30, 2014*

**Personal Finance (Math)**

Becka borrowed $100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's actual rate of return on the loan? How do you work this out?
*September 27, 2014*

**chemistry**

A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide Use this data to calculate the mass percent composition of aluminum in aluminum oxide. (Sorry need help with this!)
*September 27, 2014*

**Chemisty**

How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this Chem homework and it's getting me frustrated, please help!
*September 26, 2014*

**math**

A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 16.200 ft. give the area A of the window in square feet when the width is 3.000 ft.
*September 6, 2014*

**Physics, Math**

A typical volume of a modern hot air balloon is 2500 cubic metres, and a typical maximum temperature of the hot air is 120 degrees Celsius. Given these figures, and an outside air temperature and density of 15 ∘C and 1.225 kg/m3 respectively, compute the maximum mass (in...
*September 2, 2014*

**Physics**

A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.5 m/s, from a height of 0.7 meters above the ground. The force of ...
*August 28, 2014*

**algebra**

The following equation is used to find c, the total cost for printing a quantity of high school yearbooks, b. c=5b+200
*June 12, 2014*

**Physics**

June stands on the roof of the house which is 22.8 m high and she throws the ball at an initial speed of 4.90 m/s downward at Ben who is 1.80m tall. a) With what speed does she hit her target's head and b) how much time was it in the air? Displacement= 21 m. -Place ...
*June 7, 2014*

**Physics**

Frank is traveling the posted speed limit of 36 mi/hr in a school zone. A deer darts out between two cars. He instantly hits the brakes and the car decelerates at a rate of 5.0 m/s^2. a) how much stopping distance will he require in (meters)? b) If he was going twice the ...
*June 7, 2014*

**math last set up**

To secure a 618 meter radio tower against high winds, guy wires are attached to a ring 10 meters from the top of the tower. Each wire is anchored 90 meters from the base of the tower. Find the measure of the angle the wire makes with the ground. Round your answer to the ...
*May 22, 2014*

**math**

bystander at the Pegasus Parade, is lying on his back and observing a large balloon of a cartoon character, floating directly above Broadway Street. He is located 32 feet from a point on the street directly beneath the balloon. To see the top of the balloon, he looks up at an ...
*May 22, 2014*

**Math**

Show 2/4 of the set. How many counters?
*April 16, 2014*

**AP Biology**

Why are Eukaryotes more difficult to Transform than Prokaryotes? What methods can be used to transform Eukaryotes?
*April 14, 2014*

**AP Biology**

What is the purpose of using a plasmid containing an antibiotic resistance gene in the transformation process?
*April 14, 2014*

**math**

A stone is dropped from a cliff 344 feet high. after how many seconds will it be 200 feet above the ground?
*April 11, 2014*

**Math, Geometry**

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...
*April 4, 2014*

**Math, Geomertry **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.
*April 4, 2014*

**Math, Geomertry**

Thank you
*April 4, 2014*

**Math, Geomertry **

A total solar eclipse occurs when the moon passes between the earth and the sun, and the darkest shadow cast by the moon, called the umbra, hits the surface of the earth. If the umbra does not hit the surface, as shown in the following figure, then a total solar eclipse is not...
*April 4, 2014*