Monday

March 30, 2015

March 30, 2015

Total # Posts: 59

**Chem - solubility**

What is the molar solubility of Fe(OH)3 in water?
*March 4, 2015*

**math**

Frances walks half the distance at 5km/h and ru the other half at 10km/hit the total time for her journey is 3 hours,what is the distance
*October 29, 2014*

**math**

Can u please show me how to work it out thanks
*October 29, 2014*

**math**

Anthony is twice as old as Julian.5years ago,he was three times as old .let x be julian`s present age find the present ages of anthony
*October 29, 2014*

**math**

Trevor invests $10000 for a year.he obtains 8% per year for a part of the money and 10%per an um for remainder.at end of the year he sill receive $950 in interest.how much does he invest at 10%
*October 27, 2014*

**math**

Sum of 8numbers is X,sum of a different set of nine numbers is 2x.average of smaller set of numbers is one more than average of the larger set of numbers.write an equation for X and solve it
*October 27, 2014*

**Trig**

Mr.Steve can you help the Algebra questions that were asked. My class happen to be doing the same thing.
*October 1, 2014*

**Trig/math**

Can someone help me?
*October 1, 2014*

**Trig**

Two planes take off at the same time from an airport. The first plane is flying at 240 miles per hour on a bearing of S 45.0° E. The second plane is flying in the direction S 45.0°W at 290 miles per hour. What is the bearing of the second plane from the first after 5 ...
*October 1, 2014*

**Math**

Find three consecutive number of which the sum is 85
*June 26, 2014*

**language arts**

2. Read the following paragraph "That thrilled me, and scared me. The great world seemed to swing wide like the gates of the Fair, and I didn’t even have a plan. I hadn’t even put up my hair yet. It seemed to me it was time for that, time to jerk that big bow ...
*May 20, 2014*

**US HIST**

Explain, in a paragraph of your own words, what you consider to be the “#1 Cost of the American Civil War.”Choices: (Social, Economic, or Political)
*May 14, 2014*

**math**

For questions 1–4, find the slope of the following graphs. 1. (1 point) 2 –2 – 2. (1 point) 1 –1 – 3. (1 point) ...
*May 2, 2014*

**chemistry**

help balance HNO2+HNO3
*December 3, 2013*

**math**

jeremy spends 1/4 of his pocket money each week on books.he saves 2/3 of what is left over.if he saves $5 each week,how much weekly pocket money does he receive
*April 13, 2013*

**math**

a bottle is 1/4 full of cordial,if 500 ml of cordial is added to it, the bottle is 2/3 full.how many ml does the bottle hold when full
*April 13, 2013*

**math **

24874divided by 17 ,which digits should one change in the first number to increase the answer by 100
*April 13, 2013*

**math **

24874divided by 17 ,which digits should one change in the first number to increase the answer by 100
*April 13, 2013*

**math**

what is the total surface (in square units) of an open-topped box with dimensions L*W*H =9*7*6
*April 13, 2013*

**math**

pqrst is a regular hexagon. v is the intersection of pt and su.how big is angle tvs?
*April 13, 2013*

**Calculus**

The height (in feet) at time t (in seconds) of a small weight oscillating at the end of a spring is given below. h(t) = 0.2 cos(2t) (a) Calculate the weight's average velocity over the time intervals [1, 2] and [5, 7].
*January 26, 2013*

**math**

three sevenths divided by six thirteenths = ?
*December 24, 2012*

**math**

sorry,i am still not undrstand
*December 9, 2012*

**math**

we decided on a new logo for our brand of shirts.It was to be 3 stripes. How many different logos we make, if we used 3 colors
*December 9, 2012*

**math**

sorry, I 'm still not understand
*December 9, 2012*

**math**

could u please explain how u work it out,thanks
*December 9, 2012*

**math**

how many 2 digit numbers can be written so that the second digit is greater than the digit before it ?
*December 5, 2012*

**math**

find the missing number; 8 1 4 5 7 # ;81 4 25 36 ?
*December 2, 2012*

**math**

a box contains more than 25 but fewer than 40 balls.When the balls are counted by 3 there is 1 left over.When the balls are counted by 5 there are 2 left over.How many balls are in the box?
*December 2, 2012*

**Life orientation**

Describe the life styele cancer and explain factors that contribute to the cancer
*April 29, 2012*

**World history**

What was the economy of Syria like before the current revolution? Do you know any good website for it? Please help me!
*April 24, 2011*

**Chemistry lab**

I did a copper cycle lab and my final weight of the copper is less than what i started with. Where did the lost copper go?
*April 24, 2011*

**Algebra---Variation**

It is a variation problem. I know what the answer is and how to get to the answer I just don't know how I got it. From measurements on many rivers, geographers find that the length of a river that drains a particular "basin" of land is approximately proportional ...
*April 23, 2011*

**science**

what quantity of heat must be absorbed to convert 86.1 g of liquid to a vapor at its boiling point, -24.09 c? the heat of vaporization of ch3cl is 21.40
*April 23, 2011*

**world history**

sorry it was logged in as my brother's name. Thanks again!
*April 23, 2011*

**world history**

Do you know how much it was in France approximately? Do you think there is a source that can help me? :(
*April 23, 2011*

**world history**

Can you compare Syria's education level of population with the France's back in the days before the french revolution?
*April 23, 2011*

**Chemistry**

In a copper cycle lab, where could have the lost copper might have went? Let's say I did a copper cycle lab and my final weight of the copper is less than what i started with. Where did it go?
*April 23, 2011*

**chemistry**

Wait but I tried out the question but I kept getting the wrong answer... So if [mass Hg x specific heat liquid Hg x (Tfinal-Tinitial) ] + (mass Hg x heat fusion) (27.2 * 0.1410 * -61.8) + (27.2 * 11.4) and I got the answer as -598 but the answer is wrong. What am I doing wrong?
*April 23, 2011*

**chemistry**

Ahh sorry it was a mistake. Sorry :(
*April 23, 2011*

**chemistry**

The freezing point of mercury is -38.8°C, is the only metal that is liquid at room temperature. What quantity of heat energy, in joules, must be released by mercury if 2.00 mL of mercury is cooled from 23.0°C to -38.8°C and then frozen to a solid? (The density of ...
*April 23, 2011*

**Chemistry**

My mistake :( Sorry.
*April 23, 2011*

**Chemistry**

The freezing point of mercury is -38.8°C, is the only metal that is liquid at room temperature. What quantity of heat energy, in joules, must be released by mercury if 2.00 mL of mercury is cooled from 23.0°C to -38.8°C and then frozen to a solid? (The density of ...
*April 23, 2011*

**Chemistry**

Oh never mind I got it. Thank you for your help!
*April 22, 2011*

**Chemistry**

But how would you get the mass if the question says 2.00ml and density is 13.6g/cm^3? How do you convert ml to cm^3?
*April 22, 2011*

**Chemistry**

The freezing point of mercury is -38.8°C, is the only metal that is liquid at room temperature. What quantity of heat energy, in joules, must be released by mercury if 2.00 mL of mercury is cooled from 23.0°C to -38.8°C and then frozen to a solid? (The density of ...
*April 22, 2011*

**Chemistry**

A 237 g piece of molybdenum, initially at 100.0°C, is dropped into 244 g of water at 10.0°C. When the system comes to thermal equilibrium, the temperature is 15.3°C. What is the specific heat capacity of molybdenum?
*April 22, 2011*

**chemistry**

calculate the concentration of ions present after the reaction between 13.50mL of 2.00M BaCl2 and 2.50mL of 6.00M H2SO4 i just wanted to check my answers [Ba^2+]=1.69M [SO4^2-]=o.938M [H^+]=0 [Cl^-]=1.50M if they are wrong please explain
*February 26, 2011*

**chemistry**

how wold you prepare 2.00L of 1.00M HCl solution using 6.00 M HCl? i already found the volume of 6.00M HCl needed to be .333L. i am confused about how to actually prepare the solution. do i used a volumetric flask or any other glassware?
*February 26, 2011*

**chemistry**

the grams of Ba(OH)2 that reacted was 11.99g. but isn't this still of the impure Ba(OH)2 sample? how do i find out the mass of pure Ba(OH)2? thanks for you're help so far
*February 26, 2011*

**calculus**

the side of squyare,s, is increasing at a rate of k unites per second. find the rate at which the area of the square is increasing
*November 29, 2010*

**Algebra - word problem**

A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height, t seconds after it is tossed is (-16t^2 + 96t) feet. The green ball is given an initial velocity of 80 feet per second, and its ...
*November 30, 2009*

**algebra**

2c-d=-2 d=-4c+20
*January 12, 2009*

**statistics**

I meant REASONABLE, sorry. Thanks!
*May 29, 2008*

**statistics**

population mean=42.6 standard deviation=12 n=16 M=34.4. Is this mean a reasonable outcome for a sample of n=16, or is this sample mean very different from what would usually be expected? I obtained a z -score of -2.73. Thus, that would make the sample mean a reasonless outcome...
*May 29, 2008*

**Statistics**

*librarians intial claim
*May 2, 2008*

**Statistics**

Thanks. Would that mean the initial claim was too high?
*May 2, 2008*

**Statistics**

The head librarian claims that books have been checked out an average of seven times in the last year. You suspect she has exaggerated the checkout rate and that the mean number of checkouts per book per year is, in fact, less than seven. Using the computerized card catalog, ...
*May 2, 2008*

**statistics**

It is known that 60% of people do not respond to mailed questionnaires. In a sample of 20 questionnaires mailed, what is the probability that more than 12 people will respond?
*May 2, 2008*

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