Tuesday
March 31, 2015

Posts by JULIE


Total # Posts: 991

chemistry
2.852 x 1/16 =00.17825g
March 17, 2015

chemistry
2.241 g sample of nickel combines with oxygen to produce 2.852 g of metal oxide. Calculate the number of grams of xygen in the metal oxide.
March 17, 2015

Chemistry
Enthalpy*
March 9, 2015

Chemistry
Neutralization reaction HCL(aq) + NaOH(aq) -> NaCl(s) + H2O(l) Use your results to determine the netball change of the neutralization reaction, in kJ/mol of NaOH, Write the thermochemical equation for the neutralization reaction. I'm not sure how to even go about doing ...
March 9, 2015

math
Six unit circles are arranged inside a rectangle. the circles are tangent to each other and tangent to the rectangle as they appear in the diagram. What is the area of the rectangle?
March 8, 2015

marketing principles and information technology
the 4ps of marketing are?
March 4, 2015

Management
within an organization the first step in human resources planning is
February 22, 2015

Chemistry
Calculate the rms speed of Br2 molecules at 23 °C and 1.00 atm. What is the rms speed of Br2 at 23 °C and 1.50 atm?
February 19, 2015

Chemistry
At standard temperature and pressure, a 1.00-mol sample of argon gas is vented into a 22.4-L rigid box that already contains 1.00 mol of nitrogen gas. We would expect the argon gas to:
February 19, 2015

math
Thank you so much for the help, this explains so much!!
February 16, 2015

math
I'm just having trouble trying to see the independent and dependant variables. I have to determine whether the following are functions: The relation between distance and time if someone walks 5km/h. I think distance would be the independent variable because you can go ...
February 16, 2015

physics
Does the sun move to the west and accelerate east?
February 11, 2015

chem
When solid calcium is placed in water, it undergoes a vigorous reaction that produces solid calcium oxide, CaO(s) and hydrogen gas. determine the volume of dry hydrogen gas that is produced when 5.00 g of calcium reacts and the gas is collected at 42 degrees celsius and 770 ...
January 12, 2015

chemistry
I juiced the lemons again and got 50 ml and 140g. 8% of citric acid mol C6H8O7 = 140g x (1 mol/192.14g) 192.14 is the molar mass of C6H8O7 = .7286 mol c= n/v .7286 mol/.050 L =14.57 M %8 C6H8O7 = 14.57 M x .08 = 1.166 M I needed to find 8% of citric acid so I just pretended ...
January 8, 2015

chemistry
I'm trying to find the weight of a lemon. Weight of container= 48 g Container + pure lemon juice = 184 g (100 ml) Pure lemon juice= 184g-48= 136g Does this make sense? Because I thought lemon had around the same density to water... wouldn't that mean my answer should ...
January 8, 2015

chemistry
But that link is for water. Lemon juice has a different density than water.
January 8, 2015

chemistry
how could I figure out how many grams of pure lemon juice (squeezed from lemons) are in 100 ml?
January 8, 2015

chemistry
So I've made my cleaner, and I only had 300 ml of vinegar at home. The mass is 283g. So I found out the moles by doing 283g x (1 mol / 60.06g) = 4.71 mol The 60.06 was the molar mass of vinegar I found the concentration by doing c=n/v c= 4.71 mol / 300 ml Do I do c=n/v by ...
January 6, 2015

chemistry
When you say M, you're talking about the molar mass, not mol/L, right (my chef teacher uses M for both). And 1 mole of any element is an amount equal to its atomic mass in grams so that makes way more sense. Well thank you very much and have a good night :)
January 6, 2015

chemistry
Thank you so incredibly much of helping me, it all makes so much more sense than it did before. I get what you're saying with the vinegar and percentage but now I'm just wondering how you got 60 g as 1M if the total volume is 1L for acetic acetic acid?? How could I ...
January 6, 2015

chemistry
OH I see what you mean. So I don't really need a set chemical equation. The question on my page says that I must have "the concentrations of the active ingredients. List the concentrations of all active cleaning ingredients, and all calculations involved in ...
January 6, 2015

chemistry
Basically, I need to write an equation so I can find the moles and then find the concentrations. I need to create a cleaner for class and I need to do calculations. So like if i did: CH3COOH + C6H8O7 +H2O acetic acid in vinegar + citric acid in lemon juice + water... what ...
January 6, 2015

chemistry
So I have to make a green cleaner for a project in chemistry. I think my ingredients should be: vinegar, salt, water, and lemon juice. But I don't know how I would write that exactly as a chemical formula. How could I write a chemical equation if I have 4 reactants? I can ...
January 6, 2015

chemistry
So I did a titration lab at school with NaOH and HCl. i have to find: - volume used, NaOH - Moles of NaOH - Moles of HCl -Volume used unknown HCl - Molarity of HCl solution My concentration of NaOH stock solution was 0.100 mol/lL Final buret reading, NaOH: 14.20 ml Initial ...
January 4, 2015

chemistry 11
Food manufacturers sometimes add calcium acetate to puddings and sweet sauces as a thickening agent. What volume of 0.500 mol/L calcium acetate, Ca(CH3COO)2 (aq), contains 0.300 mol of acetate ions? So I've been over this a hundred times and I still can't get past the ...
December 17, 2014

chemistry
Ohhh I see now. Thank you so much!
December 15, 2014

chemistry
What mass of sodium hydroxide pellets must be poured into a waste drum containing 20.0 L o 3.0 mol/L sulphuric acid to completely neutralize the waste acid solution? Write a balanced chemical equation for this reaction. okay, so here is the work I already did my balanced ...
December 15, 2014

Math
No problem
December 5, 2014

Math
Correct!
December 5, 2014

Math
I mean multiply! Sorry!
December 5, 2014

Math
Yah! Now divide 2
December 5, 2014

Math
You did the division wrong
December 5, 2014

Math
First divide 2187 and 3 then multiply 2 by your answer
December 5, 2014

chemistry
Ohhh I get it, so I was supposed to change the formula to n= C x V? That makes a lot more sense, thank you so much!
December 1, 2014

chemistry
What mass of solute is present in each aqueous solution? 40 mL of 6.0 mol/L, H2SO4, solution Soo I did: C=n/V 40 mL= 0.04 L C= 6.0 mol/L/0.04 L = 150 mol/L MH2SO4= 2.02 g/mol + 32.07 g/mol + 64 g/mol= 98.09 g/mol mass H2SO4= 150 mol x (98.09g/1 mol) = 14713.5g =1.47 x 10^4 Is ...
December 1, 2014

Chemistry
What are the steps to solve this problem? "The enthalpies of combustion of glucose and ethanol are -2813kj/mol and -1369kj/mol, use Hess's law to calculate the enthalpy change when 0.500 kg of glucose is allowed to ferment." Please help.
November 28, 2014

chemistry
Wow, thank you so much that was very descriptive, I really appreciate it!
November 27, 2014

chemistry
3CuCl2 *2H2O + 2Al = 3Cu + 2AlCl3 + 6H2O Determine the number of grams that should have been produced when 1.25g of copper (2) chloride dehydrate reacts with excess aluminum so i'm not really sure how you're supposed to calculate the number of grams with hydrates?? ...
November 27, 2014

math
The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 10 square inches and a ...
November 15, 2014

US History
In regards to decisions affecting foreign policy, how did Jefferson’s actions as President validate or contradict his philosophical views as a Democratic-Republican?
November 14, 2014

Math
5/6 x 360 = 300
October 21, 2014

physics
A dolphin leaps out of the water at an angle of 24.9 ° above the horizontal. The horizontal component of the dolphin's velocity is 5.05 m/s. Find the magnitude of the vertical component of the velocity.
October 8, 2014

physics
On a spacecraft, two engines are turned on for 525 s at a moment when the velocity of the craft has x and y components of v0x = 4780 m/s and v0y = 8850 m/s. While the engines are firing, the craft undergoes a displacement that has components of x = 3.54 x 106 m and y = 7.77 x ...
October 2, 2014

Physics 1
A block is given an initial velocity of 9.00 m/s up a frictionless incline of angle θ = 21.0°. How far up the incline does the block slide before coming to rest?
September 25, 2014

Math Help!!
Two phone companies offer discount rates to students. The first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls. Write a linear equation describing the total cost...
September 21, 2014

Math
Two phone companies offer discount rates to students. The first company wants $9.95 per month plus $.10 per minute for long distance calls. The second company wants $12.95 per month plus $.08 per minute for long distance calls. Write a linear equation describing the total cost...
September 20, 2014

Math
what does that mean?? write the place and value of each number. 1)5,272,468,693 what is the selected digit in? ^ its eight
September 18, 2014

math
add all of the dvds up so 12+15+9=36 the ratio is action : total action is 12 total is 36 12:36 is your answer
September 15, 2014

Chemistry
Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided (24mL + 52mL) My ...
September 11, 2014

Algebra
Is 32 =8x - 8 an example of an open equation? My answer is yes
August 27, 2014

Algebra
You are right the first position in the ordered pair is always the value. Thank you
August 27, 2014

Algebra
Is (1, -4) a solution for the equation y = -2x? My answer is 1 = 2 (-4) 1 = -8 No it isn't
August 27, 2014

Algebra
How can you use an equation to make a prediction from a pattern. I think that you can do based on the pattern giving you a base of probability to forecast with a reasonable degree of confidence something in the future.I would think that your degree of confidence might depend ...
August 27, 2014

chemistry
If 3.65 g of a compound having a molecular weight of 481.93 g mol-1 is dissolved in water to make a final volume of 142 mL, what is the concentration of the solution in mM? Answer to three significant figures.
August 1, 2014

physics
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 2.60 ...
June 17, 2014

Math
Traveling in France, Miguel exchanged 12 U.S. dollars for 82.8 francs. A few days later, he exchanged 25 U.S. dollars for francs and got the same exchange rate. How many francs did Miguel receive? Round to the nearest tenth.
June 12, 2014

chemistry
a scuba driver is using eanx32, an enhanced nitrox gas mixture. this mixture contains 32% oxygen with 68% nitrogen. if the cylinder is at a pressure of 250 kpa, what is the partial pressure of oxygen?
June 5, 2014

biology
if a population comprised 52 AA, 114 Aa and 34 aa individuals and the 'A' allele was dominant, what would be the genotype, allele, and phenotype frequencies be
June 3, 2014

chemistry
What is the pH of a 0.001 M solution of acetylsalicylic acid (aspirin) (Ka 3.0 x 10-4)?
May 19, 2014

statistics
A survey of 100 commuters finds the average commuting to work is 25.5 minutes with the standard deviation of 11.5 minutes. construct a 98% confidence interval for the mean commuting time of commuters answer: 100%-98%=2%=0.02=0.01=1.28 E=1.28.11.5 divide by 10= 1.47 (25.5-1.47...
May 18, 2014

chemistry
Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more C(s) is produced. d...
May 11, 2014

chemistry, first year university
Solid NH4N3 decomposes explosively according to the following equation: NH4N3(s) ⇌ 2N2(g) + 2H2(g) A small amount of ammonium azide was placed in a sealed container and the air was removed. The sample was then detonated. At equilibrium the total pressure in the container...
May 11, 2014

Math
If I have 5 yellow marbles and 7 blue marbles, what fraction are yellow?
April 29, 2014

Chem
422g of ethyne and 190g of acetic acid find balanced equations and enthalpy calculations showing all steps
April 11, 2014

Programming Logic & Design
Modify the previous process to store the scores in an array. You will need to use either parallel arrays or a two-dimensional array in order to store the score, slope and rating for each entry. In the loop you created in the previous assignment to read the 10 scores, add logic...
April 10, 2014

Physics
I need immediate help on these questions:. 2.a small plastic ball with a mass of 0.005kg is suspended from a thread and hangs in equilibrium as shown in the drawing below when a small rod with a 2 uC charge is brought to within 3mm of the ball a)find the tension force in the ...
March 30, 2014

math
26+23+16+24=89 violet=24 so 24/89 Correct :)
March 13, 2014

MATH
10+6+11=27 brown+white=17 so 17/27 correct 16,18,20,22,24,26,28 so 7/? 16,17,18,19,20,21,22,23,24,25,26,27,28 so ?/13 ---- 7/13 Correct
March 13, 2014

Science
Ty :)
March 13, 2014

Science
Which of the following is not an example of work? A. raising a barbell over your head B. picking up a box off the floor C. holding a tray in the cafeteria line D. pushing a box across the floor I think its C.
March 13, 2014

Science
OOOhhh ok lol Ty yet again. :)
March 13, 2014

Science
In what direction does an applied force move an object? It moves opposite right?
March 13, 2014

History
Oh tytyty :) I posted a science question and what I got can you correct for me?
March 13, 2014

Mrs.Sue... Anyone???
I have 3mins to have this done, I just wanna know if im right....
March 13, 2014

History
Mark the statement if it describes Roman society during Julius Caesar’s time. A. Wealthy individuals owned and controlled most of the land. B. Few people were living in the cities. C. The government of Rome was corrupt. D. Civil war broke out. E. Romans were losing faith ...
March 13, 2014

Mrs.Sue?
Are you still there?
March 13, 2014

History--Correct 1 question please? :)
Mark the statement if it describes Roman society during Julius Caesar’s time. A. Wealthy individuals owned and controlled most of the land. B. Few people were living in the cities. C. The government of Rome was corrupt. D. Civil war broke out. E. Romans were losing faith...
March 13, 2014

History--Correct 1 question please? :)
help*
March 13, 2014

History--Correct 1 question please? :)
Ok lol ty can you hel with one more correction?
March 13, 2014

History--Correct 1 question please? :)
oh? I meant B. lol just mistypd in original question
March 13, 2014

History--Correct 1 question please? :)
I meant B..... LOL oops
March 13, 2014

History--Correct 1 question please? :)
Which statement below best describes Cincinnatus and Julius Caesar? A. Both men put the welfare of the Roman Republic above their own personal success and both obeyed the Senate in time of crisis. B. Cincinnatus accepted the role of dictator in a crisis and then gave up his ...
March 13, 2014

math
i dont get how my teacher teaches she goes to fast for my to understand it what do i do
March 12, 2014

andrew jackson
how was andrew jackson a good president?
February 25, 2014

history
what was good and not good about andrew jackson's political ideas?
February 25, 2014

Chemistry--acids
Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.) NH41+ H2 O2 C4H10 H2CO3 H2SO4 H3O1+
February 23, 2014

Can someone Explain this(math)
Ty! :)
February 21, 2014

Can someone Explain this(math)
34, 36, 43, 46, 47, 48, 48, 52, 53, 54 Box And whisker Plot I Don't Understand these at all can someone Explain without totally giving me the answer?
February 21, 2014

Math
OHHhhh ok TY very much! I think I get it now.
February 21, 2014

Any1??
Please explain how you get the answer to. :) ty
February 21, 2014

Math
Given f(x) = –5x + 1, what is f(–2)?
February 21, 2014

physics
You would like to shoot an orange out of a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. On your first try, you fire the arrow at 36.0 m/s at an angle of 30.0° above the horizontal from a height of 1.40 m while standing 41.0 m away. Treating ...
February 17, 2014

Science ( Need help really bad Please!)
really Really need help :)
February 13, 2014

Science ( Need help really bad Please!)
An object's weight is dependent upon its location in the universe. Why is this true? A. This is true because weight is the magnitude of gravitational force acting on an object, and since gravitational force varies in different places in the universe, weight also varies. B...
February 13, 2014

physics
True :)
February 13, 2014

chemistry
The pH value would be C.1.3
February 13, 2014

math
a heater is plugged into 120v wall outlet. if the resistance in the heater is 15ohms what is the power used
February 13, 2014

Physical Science
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
February 13, 2014

social science
Think about the war between the United States and Iraq. To what degree, if any, did political culture play a role in the decision to go to war, the public’s support of the war, and how public officials discussed the war? Looking at this example, reflect back on historical...
February 5, 2014

chemistry
Ammonium chloride and sodium nitrite react to form sodium chloride, water and nitrogen gas. If 6.33 moles of ammonium chloride react with sodium nitrite, how many grams of sodium chloride will be produced?
January 29, 2014

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