Friday
December 9, 2016

# Posts by David

Total # Posts: 2,182

Chemistry
8-hydroxyquinoline (Q) can complex and precipitate many metals. A mixture of the aluminium and magnesium complexes weighed 1.0843g (MW=459.43; 312.61). When ignited, the mixture decomposed and left a residue of Al203 (MW 101.96) and MgO (MW 40.304) weighing 0.1344g. What is ...
August 24, 2014

computers
create a program that will input two quizzes and will compute for sum,difference,product,quotient and average using printf and scanf. create your own design.
August 21, 2014

MATH
The first month's dues will be used to rent a film about computer-related careers, to purchase a reference book, and to buy refreshments for the next meeting. If 1/2 of the money is spent on her film, 1/4 of the remainder is used for refreshments, and $7.50 is spent on the... August 12, 2014 math The answer is c August 7, 2014 computers when you connect to a remote VPN server with your laptop running windows 8 what key item is your computer allocated August 7, 2014 Chemistry Why the ph will be determinated as if you have 0,05M H3PO4??? August 7, 2014 math hw 42. Twenty minutes after a plane leaves the airport, it is reported to be 160 miles away. What average speed of the plane in the miles per hour? August 5, 2014 math hw An automobile party leaves at 7:55 A.M., and arrives at its destination 15 miles away at 8:15 A.M. What was the average rate on this trip (in M.P.H.)? August 5, 2014 math hw 40. How far (in miles) does a car travel when its average rate is 35 miles per hour and it travels for 3 hours and 24 minutes? August 5, 2014 math test review 18. In triangle ABC, m<C=2m<b,m<A=6m<B. what is the measure of <c? A.5 degrees B.15 degrees C.20 degrees D.30 degrees E.40 degrees August 4, 2014 math That was by mistake, I didn't know and typed in again. August 4, 2014 math 1. If b is positive integer less than 200, then how many integer pairs (a,b) satisfy the equation a/b= 2/9? August 4, 2014 math 1. If b is a positive integer than 200, then how many integer pairs (a,b) satisfy the equation a/b= 2/9 August 4, 2014 math test review 16. If the base of a right triangle is 8 (square root)2 and the hypotenuse is 18, what is the area of the triangle? A.14 B.14 square root 2 C.56 square root 2 D.64 E.64 square 2 August 4, 2014 math hw In set of 30 different positive integers, every number is even and/or a multiple of 3. If 22 of these numbers are even and 15 are multiple of 3, then how many of these numbers are multiple of 6? August 4, 2014 math hw 2. If a^2-b^2=20 and a+b=2, what is the value of a-b? I added the a^2-b^2+20 and a+b+20, but i couldn't get the answer to equal a-b. August 4, 2014 math hw 10.Thirty students in a chemistry class took a test on which the overall average score was 78. If the average score for 15 of those students was 85, what was the average score for the remaining members of the class? I know that "average" means dividing, but i'm ... August 4, 2014 math 9. In Mr.chin's math class there were g girls and b boys. The number pf girls was 5 less than twice the number of boys. What is the value of g in terms of b? this is what I have so far: 2n-5 August 4, 2014 Chemistry 2Na + 2H2O------> 2NaOH + H2 H=-386kJ If 5g of sodium is added to 200g of water in an open container: (A) How much heat is absorbed/released int he reaction? (B)What volume in formed at 22C and 102kPa? (C) If boiling point elevation constant is 0.52K molal what is the ... August 3, 2014 maths The Park's are buying new carpet for their house.They need about 1,175 square feet of carpet.The carpet they buy is sold by the square yard. Estimate the number of square yards of carpet the Parks need for their house. Show your work. August 2, 2014 Astronaut launches bowling ball A 100 kg astronaut carries a launcher loaded with a 10 kg bowling ball; the launcher and the astronaut’s spacesuit have negligible mass. The astronaut discovers that firing the launcher results in the ball moving away from her at a relative speed of 50 m/s. The astronaut ... July 28, 2014 English She waited patiently for her turn on line at the New Age bookstore. adjective adverb noun verb July 6, 2014 Physics . A stone is dropped from the top of a building that is 500m high. Disregarding air resistance how long does it take the stone to reach the ground? June 25, 2014 math Charlie must choose a number between and that is a multiple of , , and . Write all the numbers that he could choose. If there is more than one number, separate them with commas May 28, 2014 Physics A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward if the ball ... May 27, 2014 Math please check my answer? 1)6x+11y=30 A) x-intercept= (-24,0);y intercept =(0,19) B)x-intercept=(0,1/5);y intercept=(11/30,0)<<<< C)x-intercept= (5,0);y intercept=(0,30/11) D)x-intercept= (24,0);y intercept=(0,19) May 22, 2014 Math please check my answers? 1) The linear function f(x) contains the points (-10, -29) and (-2, 83). If g(x) = 25x - 50, which statement is true? A. The functions f(x) and g(x) both have positive slopes. <<< B. The functions f(x) and g(x) both have negative slopes. C. The function f(x) has a ... May 22, 2014 Algebra please check my answers Are 1 and 2 correct? May 21, 2014 Algebra please check my answers Thanks! Are the others correct? May 21, 2014 Algebra please check my answers 1) The linear function f(x) contains the points (-10, -29) and (-2, 83). If g(x) = 25x - 50, which statement is true? A. The functions f(x) and g(x) both have positive slopes. <<< B. The functions f(x) and g(x) both have negative slopes. C. The function f(x) has a ... May 21, 2014 Algebra The table below represents the function f(x). (-6, 12),(-5,-8),(-4,-4), (-3,0),(-2,4),(-1,8),(0,12). If g(x) is a linear function that has a slope of -3 and a y-intercept of -9, which statement is true? A) The x-intercept of f(x) is less than the x-intercept of g(x). <<&... May 21, 2014 Cost Accounting A company’s sales volume averages 4,000 units per year. Recently, its main competitor reduced the price of its product to$48. The company expects sales to drop dramatically unless it matches the competitor's price. In addition, the current profit per unit must be ...
May 20, 2014

Chemistry
When 155 mL of water at 26 degrees Celsius is mixed with 75 mL of water at 95 degrees Celsius, what is the final temperature of the mixture? (d Water = 1.00 g/mL) Im really stuck on this problem and chemistry isnt exactly my strong point, thanks in advance!
May 19, 2014

physicss
a point charge -q, mass m is flying up at the speed v(0)= v 0 from the distance x(0)=L from a uniformly and positively charged thin plate, its linear density equal p. determine the maximum distance of a particle from the plate
May 19, 2014

Physics
a point charge -q, mass m is flying up at the speed v(0)= v 0 from the distance x(0)=L from a uniformly and positively charged thin plate, its linear density equal p. determine the maximum distance of a particle from the plate
May 19, 2014

Astronomy
v = c*sqrt(1-4/a) a = 4/θ^2 θ = sqrt(4/a) inverse formula sqrt(1-v/c^2), so in this case. v = c*sqrt(1-4/a)
May 11, 2014

algebra
Let f(x)= 2x^2 +7 and g(x)= x – 6. (a) Find the composite function (f*g)(x) and simplify. Show work. (b) Find ( f*g)(1). Show work.
May 9, 2014

Pre algebra
A cyclist rides her bike at a speed of kilometers per hour. What is this speed in kilometers per minute? How many kilometers will the cyclist travel in minutes? Do not round your answers.
April 26, 2014

algebra
when P dollars is invested at interest rate (I), compounded annually, for (t) years, the investment grows to (A) dollars, where A=P(1+I)^3. Find the interest rate if $40,960 grows to$49,130 in 3 yrs.
April 22, 2014

Maths
Fred is 10 yrs older than Ted. In 3 yrs time Fred will be 3 times as old as Ted. Let Fred be x yrs old now. Write an equation to represent this situation. Solve equation and state how old each person is now.
April 20, 2014

Geometry
tha area of a regular octagon found by decomposing the octagon into a rectangle into trapezoids is ________ m2
April 10, 2014

chemistry
I want to make sure I am correct in classifying whether the following properties of hydrogen are chemical or physical. thanks 1. hydrogen will burN in in oxygen to form water. CHEMICAL 2. hydrogen does not support combustion. CHEMICAL 3.hydrogen is usually found combined with ...
April 8, 2014

Chemistry
I am not sure if I understand how to balance this correctly. I need to write a balanced equation for the decomposition of solid copper(ii) sulfate to form gaseous sulfur trioxide and solid copper (ii) oxide. 2CuSO7 = CuSO4 + SO3 + CuO
April 8, 2014

Chemistry
Could someone please let me know if I have the answer to the following question correct? If my answer is incorrect could you please help me answer this question. what is the difference between 3M and 9M of sulfuric acid? I think the difference is that there are 3 moles of ...
April 7, 2014

math
A piece of rope is in the shape of a 12ft. by 16ft. rectangle. The same rope is then shaped into a square. What is the area of square?
March 30, 2014

Physic Angular momentum and torque
What is the angular momentum of a 1.0kg uniform cylindrical grinding wheel of radius 19cm when rotating at 1700rpm ?How much torque is required to stop it in 4.6s ?
March 29, 2014

Physic Moment of inertia
Determine the moment of inertia of a 11.1kg sphere of radius 0.794m when the axis of rotation is through its center.
March 29, 2014

Algebra
Graph the solution to the inequality on the number line |4u-8|=>12
March 25, 2014

Chemistry
10.1/50= 0.202
March 25, 2014

physics
The micrometer (1 μm) is often called the micron. (a) How many microns make up 1.5 km? (b) How many centimeters equal 1.5 μm? (c) How many microns are in 1.5 yd?
March 23, 2014

algebra
A box of candy contains two types of chocolates. One type is made with nuts, and the other type is nut free. The box contains 3 times more candies with nuts than candies without nuts. Johnny pulls a candy out of the box at random. What is the probability that Johnny pulled out...
March 20, 2014

chemistry
Combustion analysis of a hydrocarbon produced 33.01 g {\rm CO}_2 and 27.04 g {\rm H}_2{\rm O}. Calculate the empirical formula of the hydrocarbon. Express your answer as a chemical formula.
March 17, 2014

Chemistry Urgent
Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol
March 9, 2014

Chemistry Urgent
Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be done to step ...
March 9, 2014

Chemistry
Consider the following problem: Target: 2NOCl (g) ¡æ N2 (g) + O2 (g) + Cl2 (g) ¥ÄHrxn= ? Steps: 1. ¨ö N2(g) + ¨ö O2(g) ¡æ NO(g) ¥ÄH= 90.3 kJ 2. NO(g) + ¨ö Cl2(g) ¡æ NOCl(g) ¥Ä H= -38.6 ...
March 9, 2014

algebra (solve for y)
woops there is a 2 in front of the first e&(2y). Proper equation: 0=2e^(2y)-e^(y)
March 4, 2014

algebra (solve for y)
0=e^(2y)-e^(y) Need to solve for y here, don't understand why answer is -ln(2) in the book. Thanks.
March 4, 2014

poetry part 2
I think its C.Peace
March 2, 2014

Physics
No, youa are wrong. It is not mVa = .1m(Va-V) + .9mVb it is mVa = (-).1m(Va+V) + .9mVb it is not 2, it is 20/9
March 1, 2014

Math
what is the sum of the solutions of the equation |2x-7|=11? A) -9 B) -7 C) 5 D) 7 E) 9 ***What is the most efficient way to solve this?
March 1, 2014

English
Can you help me identify the subordinate clause in the sentence The camel is the only pack animal that can stand the test of the Sahara. Would the subordinate clause be "than can stand the test of the Sahara?"
February 25, 2014

English
Having trouble identifying subordinate clauses in the following sentences. 1. The airplane that we saw can land in only a few airports in this country. I think for this sentence the subordinate clause would be "that we saw." 2. The coin that I purchased is an old ...
February 25, 2014

English
To your question Which of these clauses cannot stand alone? The hummingbird is the only bird that can fly backward, I would say "that can fly backward" cannot stand alone.
February 25, 2014

English
In the sentence, The hummingbird is the only bird that can fly backward, the verb is either "is" or "can fly" I cannot determine what the subordinate clause is.
February 25, 2014

English
Find the subordinate clause in the sentence The hummingbird is the only bird that can fly backward.
February 25, 2014

English
I think the correct sentence is number 2, "on the hill."
February 25, 2014

Geometry
According to the given information, segment AB is parallel to segment DC and segment BC is parallel to segment AD.. Construct diagonal A C with a straightedge. It is congruent to itself by the Reflexive Property of Equality. ________________. Angles BCA and DAC are congruent ...
February 25, 2014

chemistry
A gas with a volume of 6.65 L at a pressure of 1.22 atm is allowed to expand until the volume raises to 54 L. What is the new pressure (in atm)?
February 23, 2014

Biology
A typical organism that might occupy a forest in the southwestern United States is a a. Cactus b. grizzly bear c. parrot d. polar bear
February 20, 2014

ITT Tech
Simplify -(-15x)-3x
February 18, 2014

Maths
Calculate the simple interest on R3 500 invested at 6% per annum for 3 years
February 9, 2014

literary
What emotion is associated with weariness? I'm supposed to analyse the emotions that are expressed within a text, and the beginning is happy and jubilant while the second half adopts a more weary mood, so i'm wondering what emotion would i use?
February 8, 2014

math
least to greatest 3/4 2/3 7/8
February 4, 2014

Math
A math teacher wishes to use groups of 5 and/or 7 students for a class assignment. When she tries to make assignments she notices that it cannot be done with the number of students in her class. However, if the number of students were any larger, the assignments could be made...
January 30, 2014

physics
Wavelength in a Closed Column Here is the prompt: We place a speaker near the top of a drinking glass. The speaker emits sound waves with a frequency of 3.75 kHz. The glass is 14.1 cm deep. As I pour water into the glass, I find that at certain levels the sound is enhanced due...
January 30, 2014

Math
How do I give a BIG THANK YOU TO MS SUE?
January 28, 2014

Math
Hi Ms Sue Thank you sooooooo much I kinda thought that was it but........ there are 6 blueberry right?
January 28, 2014

Math
I was out of school for 4 days! I tried to catch up but....I need help with There are 20 muffuns on a plate. 2/5 are chocolate. 3/10 are vanilla. How many chocolate how many vanilla? Challenge: Rest are blueberry how many blueberry? Can somebody answer this for me and show me ...
January 28, 2014

chemistry
equation for joules needed to increase water temp
January 28, 2014

ASAP Help thankies everybody History
Ms. Sue? is it a?
January 28, 2014

IT WEB SYSTEMS
Provide a real-life application in which you manipulate data in a string or an array format. Describe the situation, manipulation process, and data result.
January 27, 2014

Science
I read the article already, but I don't understand what is the answer. I am not sure if the question is referring to the the complementary base or something?
January 24, 2014

Science
RNA is to U(Uracil) as DNA is to ? a. Cytosine (don't think so) b. Guanine (don't think so) c. Thymine d. Adenine
January 24, 2014

math
If a test has 25 questions with 4 possible answers per questions, how many possible answer combinations are there?
January 24, 2014

Question help
Reading titles and headings, and trying to get an overview of what lies ahead in a reading passage is called: A:questioning B:relating C:surveying D:reciting
January 21, 2014

maths literacy,history,geography,cat and english
dont know career
January 19, 2014

Geometry
Use the figure of a square pyramid to answer the following questions. a.) Find the total surface area of the pyramid. b.) Find the volume of the pyramid. Do not answer them. I know How to find the answer. Surface Area is squared right?
January 17, 2014

Geometry
A person who is 5 feet, 6 inches (5.6 feet) tall casts a shadow (from N to S) that is 12 feet long. The distance along the ground from the person (N) to the flagpole (G) is 18 feet. Find the height of the flagpole (FG) showing all calculations.
January 17, 2014

math
ann uses three 1/4 size strips to model 3/4. She wants to use 1/8 size strips to model an equivalent fraction. how many 1/8 size strips will she need?
January 16, 2014

geometry
A person who is 5 feet, 6 inches (5.5 feet) tall casts a shadow (from N to S) that is 12 feet long. The distance along the ground from the person (N) to the flagpole (G) is 18 feet. Find the height of the flagpole (FG) showing all calculations. What is the length of SP and PF?
January 14, 2014

Ashford
Assimilation
January 11, 2014

Science
How much heat is absorbed when 500g of water goes from 25 to 35 degrees
December 29, 2013

Biology
How many chromosomes are in a human blood cell? What term describes a picture of the human chromosomes arranged in pairs?
December 13, 2013

Physics
Find the tension T2 of the box hanging from the rope if 1 = 25°, 2 = 65°, T1 = 60.58 newtons, and W = 143.4 newtons.
December 11, 2013

math
I have this question and this helped me, thanks! :)
December 10, 2013