Post a New Question

Posts by Clare

Total # Posts: 110

Math
sum of the digits of a three-digit number is 20. If the hundreds and unit digits were interchanged, the resulting number is 297 less than the original. Find the number if the hundreds digit exceeds the tens digit by one.

Chemistry
How many litres nitric acid 70% w/w and how many litres of water do I need to prepare a 47 v% nitric acid solution. Please help.

Chemistry
A 10.0-g sample of solid NH4Cl is heated in a 5.00-L container to 900.°C. At equilibrium the pressure of NH3(g) is 1.51 atm. NH4Cl(s) mc011-1.jpg NH3(g) + HCl(g) The equilibrium constant, Kp, for the reaction is:

Chemistry-is this right? IGNORE!
ignore this. I saw your earlier post thank you.

Chemistry-is this right?
Water has a pH of 4.9? Calculate H3O and OH 1. H3O= 10^4.9=1.25*10^-5 2. OH= 14- 4.9= 9.1

chemistry
Sorry. We were give a pH indicator where we put a drop of it in the HCl and NaOH where we were able to determine the pH because HCl was a red color while NaOH was a indigo/bluish color. My teacher didn't go over theoretical calculate pH and its not in the book but he gave ...

chemistry
Hi, I don't think that's what my teacher wants We did a lab experiement where for tube one used 9 drops of deionized water and places 1 drop of 0,1 M HCl measuring a pH= 1 2.In tube 3 used 9 drops of deionized water and placed 1 drop of 01M NaOH measuring a pH= 13 Not ...

chemistry
How to calcuate therotical pH 1.) 0.1 M HCl measured pH=1 2.) 0.1 M NaOH measured pH=13?

Chemistry
H2S+H2O<-> H3O +HS why THIS BUFFER SOLUTION IS ABLE TO RESIST CHANGE IN PH WHEN SMALL AMOUNTS OF OH ARE ADDED TO IT.

Chemistry-is this right?
pH: 4.9 Calculate: H3O H30= 10^-pH H3O=10^-4.9 H30=1.25 * 10^-4 AND CALCULATE OH=14-pH OH=14-4.9 OH= 9.1

Chemistryh
How do you calculate theoretical calculated pH. 1. 0.1 M HCL pH: 1 2. 0.1 M NaOH pH: 13

chemistry
1. OH= 6.67 *10^-13 Here's what I did 1*10^-14/0.015 M= 6.67*10^-13 2. pH=1.82 Did do it right? Wrong? Thank you so much for all your help I really appreciate it :)

chemistry
Solution equals 0.015 M HCl Find OH Find pH Isn't pH=1.8? I don't know how to find OH :( Is there a formula or do subtract 14-1.8? I'm confused and I got this assignment today yet we haven't gone over anything yet.

Chemistry-is this correct?
Calculate the pH and identify as acidic, basic,or neutral 1. H= 1.10 * 10^-11 M Answer: pH=11, basic 2. H= 2.61 * 10^-2 M Answer: pH:1.58, acidic 3. OH= 4.0 * 10^-9 M pH: 8.39, basic

Chemistry-is this right?
1.0E-14 = [H+] [OH-] = 1E=12 [OH-] [OH-] = 1E-2 and pOH = 2

Chemistry
Calculate OH and H pH= 12 How to set this up

Chemistry- is this right?
Calculate the H+ of 0.1 M NaOH Calculate the pH of 0.1 M NaOH [H+]=10^ph [H+]=10^-13 [H+]=1*10^-13M Since pH+ pOH=14 pH= -log (0.1M) pH=1 so 14-1 pH= 13

Chemistry
Ok I guess theres suspose to be a negative sign here...10^-pH so really its 0.1 M with a pH= 2

Chemistry- is this correct?
Ok I think i got it H+= 10^pH H+=10^2 H+=100M In the next question it asked to calculate the pH now. pH=-log (1OOM) pH= -2 Is this right or did I do this wrong :(

Chemistry
Calculate the H+ for number #2 #2 : H+ = 10^-2, with a pH of 2 Not sure how to calculate H+

chemistry
Which way will the equilibrium shift when subjected to the following changes? 2NOBr + heat <-> 2NO +Br2? NO is addded temp. doubled Br2 removed Pressure increased I said: reverse, forward, forward, forward

math
Methylpresnisolone (Solumedrol) is a glucocorticoid ordered for end-stage respiratory disease. You need to administer 125 mg IVP. It is available as 75 mg/mL. How many mL will you administer? Round to the nearest 10th mL. Write the NUMBER ONLY in the blank, not mL. I got 1.7 ml

reading and writing
thanks for your help :)

reading and writing
the answer was a.

reading and writing
Paddy and Clare are writing effective conclusions. Paddy's conclusion will summarize his main point and reaffirm his theses statement. Clare's conclusion will take the readers beyond the scope of her essay. Who is writing an effective conclusion? A. Both Paddy and ...

reaing and writing
but anyway thanks for your help.:)

reaing and writing
the answer was b.

reaing and writing
Cary and Vince are discussing titles for their essays. In developing a good title, Cary will create a title using alliteration. Vince will use a vague, broad title. Who is using a better strategy to develop a good essay title? A. Both Cary and Vince B. Only Cary C. Only Vince ...

reading and writing
Which of the following is not an example of a transition word or phrase? A. Consequently B. Or C. Beyond D. For instance I need help with this answer. I thought is (c) but is not.

reading and writing
Please read the following excerpt from an essay, and answer the question that follows. After Sean was arrested for breaking into a pawnshop, I began to wonder. Why did some kids from my neighborhood end up in trouble while most of us didn't? I started out with a question: ...

reading and writing
Which of the following is not an example of a transition word or phrase? A. Consequently B. Or C. Beyond D. For instance my answer is c.

reading and writing
What type of expression would you use in an essay if you wanted to connect a new sentence to one that precedes it? A. Expressive B. Tracking C. Effective D. Transitional my answer is d.

reading and writing
Which of the following titles is made more effective by alliteration? A. Guns: Our Lethal Heritage B. Ruby, the Rose of Roslyn C. Now You See It; Now You Don't D. What's in a Name? my answer is b.

reading and writing
A _____________ should make clear what the paragraph is about and express a view about the subject matter. A. title B. conclusion C. topic sentence D. thesis statement my answer is c.

reading and writing
Which of the following is not a good suggestion for writing an introductory paragraph? A. Describe a hypothetical situation. B. Cite a surprising fact or statistic. C. Never asks questions. D. Use a quotation to help illustrate your thesis. my answer is c.

reading and writing
When you write your ideas quickly and don’t worry about punctuation, what writing strategy are you using? A. Narrowing B. Mapping C. Styling. D. Freewriting my answer is d.

reading and writing
To narrow a general topic you've selected, which pair of techniques is most likely to be effective? A. Freewriting and questioning B. Using a branching diagram and consulting your journal C. Questioning and choosing an issue that interests you D. Branching diagram and ...

reading and writing
Ron and Quincy are organizing the facts in their essays. Ron says putting details in spatial order means to organize them according to the order in which they happened. Quincy says it means putting the details in order according to their location. Who is correct? End of exam A...

reading and wrting
What is the most likely purpose of the essay from which the following passage was taken? Having been raised on a dairy farm in rural Minnesota, Lorie Ann Kline was having trouble adjusting to life in the city and to Central High School. In a conference with her parents, the ...

reading and writing
When you write, the tone, vocabulary, and type of information you choose should vary depending on your A. audience. B. education. C. biases. D. values. my answer is a.

reading and writing
Terri and Jose are preparing outlines. In preparing an informal outline, Terri will use key words and phrases to list her main points. In preparing a formal outline, Jose will use capital letters and Roman numerals to list the important points. Who is using the correct outline...

reading and wrting
b.

reading and wrting
is a.

reading and wrting
What type of information do you need to support your thesis statement? A. Theory B. Back-up C. Reports D. Evidence my answer is

reading and writing
my answer is b.

reading and writing
Paddy and Clare are writing effective conclusions. Paddy's conclusion will summarize his main point and reaffirm his theses statement. Clare's conclusion will take the readers beyond the scope of her essay. Who is writing an effective conclusion? A. Both Paddy and ...

science
is the movement of a substance against its concentration gradient (from low to high concentration). In all cells, this is usually concerned with accumulating high concentrations of molecules that the cell needs, such as ions, glucose, and amino acids.

Math
3.50 x 0.8 = 2.8 Subtract 3.50-2.80= .7 Each greeting card cost .70 cents Because 80% in decimal form = 0.8

health
diet

HEALTH
platelets

Chemistry
how much heat is required to warm a 215 g cup of water from 21 degree Celsius to 85 degree Celsius? Not sure what the formula is or how to set this up. I know the specific heat formula is heat/mass x change in temperature. Not sure if this applies to the question. Please help...

Chemistry
Daily diet consists of 120 g of carbohydrates, 65 g of fat, and 43 g of protein. How many calories does this diet provide daily? My work/answers: 120 g x 4 g/calories of carbs = 48 g/cal 65 g x 9 g/calories of fats= 585 g/cal 43 g x 4 g/calories of protiens = 172 g/cal Total: ...

Chemistry
Person consumes 1995 Calories/day. How many is this in kJ My answer/work: 1995 x 1000 cal/1 Cal x 4.184J/1 cal x 1 kj/1000J= 8347.08kj Let me know if I did anything wrong and give me a hint on what I can do to fix it thank you :)

Science
Density= mass x volume Density= 100 g x 25.0 ml Density= 2500 g/ ml

Chemistry
Thank you :)

Chemistry
Calculate the following temperatures 1. Its 18 F. What is this in C? 2. Calculate this temperature (from question #1) to K 3. Convert 38.2 C to F My answers 1. -7.7 C 2. 265.3 K 3. 100.76 F Let me know what I did wrong if I'm incorrect thank you :)

Chemistry/Math
Calculate the following and round to the allowed number of significant figures 1. (18.00 x 1.5) / 0.00625 2.4.61 X 10^3 / 5.1008 x 10^-4 My answers 1. 4320 2. 9.037 x 10^-1 Please explain what I did wrong if I'm incorrect. Thank you

Math
in the woods is a cellular tower that is 72 feet tall and has a 60 foot shadow. next to it is a tree with a 40 foot shadow. how tall is the tree

Finite Math
The Sandersons are planning to refinance their home. The outstanding principal on their original loan is $110,000 and was to amortized in 240 equal monthly installments at an interest rate of 11%/year compounded monthly. The new loan they expect to secure is to be amortized ...

math
The Sandersons are planning to refinance their home. The outstanding principal on their original loan is $110,000 and was to amortized in 240 equal monthly installments at an interest rate of 11%/year compounded monthly. The new loan they expect to secure is to be amortized ...

Science
5. A team of scientists is testing a new drug on AIDS patients. They expect patients to develop fewer AIDS-related illnesses when given the drug, but they don't expect the drug to cure AIDS. Thought Process: a. What is the independent variable? New drug treatment b. What ...

Science
Identify the dependent and independent variables in the following experiments. 1. Height of bean plants is recorded daily for 2 weeks. 2. Percent absorption by a pigment is measured for red, blue, green, and yellow wavelengths of light. My thought process: 1. a. Dependent: ...

Precalculus
If the length of a rectangular is three feet longer than the width and the perimeter is 62 feet, what is the width?

Chemistry
Thank you!

Chemistry
Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied ...

Chemistry
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 1.30 ...

Math
Solve the equation for the unknown quantity x. Round to the nearest thousandth if needed. 2x=29

Math
A drug is eliminated from bloodstream exponentially with half life of 48hours. If patient receives initial dose of 15 milligrams at midnight, how much of drug is in patient's blood at noon the next day?

Math
Solve the equation for unknown quantity x. 2x+29

Math
How much energy, in joules, is released by an earthquake of magnitude 3.4?

Math
Initial population of a town is 18,691 and it has a doubling time of 15 years. What will the population be in 4 years?

Math
half life of a drug in the bloodstream is 14 hours. By what factor does the concentration of the drug decrease in 22 hours?

Georgia Studies
Apart from being a dispute over land between the French and British, what are some key elements to the French and Indian War?

Physics
A train with a mass 5x10^5 kg is moving with a speed 80km/hr. If the train stops in 2min...1)What is the acceleration of the train? 2) What is the braking force applied to the train?

Accounting
Q1). As the chief accountant of Breathless Perfume Pty ltd, you discover a significant misstatement that overstated net profit in this year’s financial statements. The misleading financial statements are contained in the company’s annual report, which is about to be ...

college physics
When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...

h.s. physics
Consider a projectile that is thrown upward at an angle between 10 and 80 degrees from the horizontal, when are the acceleration and velocity vectors perpendicular to each other? (Only consider the motion during free fall.) a) nowhere b)at the highest point c)the launch point ...

college physics
When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...

college physics
Consider a projectile that is thrown upward at an angle between 10 and 80 degrees from the horizontal, when are the acceleration and velocity vectors perpendicular to each other? (Only consider the motion during free fall.) a) nowhere b)at the highest point c)the launch point ...

Algebra
Ohh right thank you

Algebra
wait isn't (y^-2)/(y^4)=y^2?

Algebra
Please simplify completely :)

Algebra
(100x^3y^-2)/(64x^7y^4)

Geometry
Marion is observing the launch of a space shuttle from the command center. When she first sees the shuttle, the angle of elevation to it is 16°. Later, the angle of elevation is 74°. If the command center is 1 mi from the launch pad, how far did the shuttle travel ...

Geometry
True or False: An angle of depression can never be more than 90˚.

literature
What are two things that can be a symbol of courage?

Music Theory
Thank you. That helped a lot!

Music Theory
How do you change a natural minor scale to a harmonic minor scale? For example: d harmonic minor

Algebra
Oh I guess it does. Thanks!

Algebra
But that still doesn't work in the equation...does it?

Algebra
No that's what someone else said and it doesn't work!! And I thought -.6 x 2= -1.2 not positive 1.2.

Algebra
Hi this question was already asked but there is still no correct answer. I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks The equation is: .05x-.6(x+2)=.08 Please show the...

science
Not really sure I understand the question, but as a substance cools, particles move faster. As a substance heats up, particles move slowly. Sorry if that wasn't your question...

Algebra
That doesn't work because -.6 x 2= -1.2, not positive 1.2. And it still doesn't equal .08 when you plug it in.

Algebra
I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks! The equation is: .05x-.6(x+2)=.08 Please show the work as well as the answer. Thanks again.

algebra
If it is 2x, x would be 10. 2x + 16= 36 -16 -16 2x=20 /2 /2 x=10

intermediate algebra
Divide and check: show all work (t4 − 2t2 + 4t − 5) ÷ (t2 − 3)

Physics
A grenade is thrown from a trench that is 10 meters below groud level. The soldier throws the grenade at a velocity of 30 m/s at an angle of 60 degrees above the horizontal. Determine the horizontal distance the grenade will fly before it hits the ground, and the magnitude and...

math
Carbon disulfide is produced by the reaction of carbon and sulfur dioxide. 5C(s) +2 SO2(g) ---------> CS2(g) + 4CO(g) How many moles of CO would be made if you started with 10 moles of C?

Chemistry
1.17 V

  1. Pages:
  2. 1
  3. 2
  4. Next>>

Post a New Question