Sunday
September 25, 2016

Posts by Melissa

Total # Posts: 1,259

Chem 205
A solution of ammonia and water contains 3.50×1025 water molecules and 9.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution? Any help would be appreciated, thank you!
September 11, 2016

chemistry
From a laboratory process designed to separate water into hydrogen and oxygen gas, a student collected 10.2 g of hydrogen and 66.9 g of oxygen. How much water was originally involved in the process?
September 1, 2016

Algebra
The larger of two numbers is 5 less than twice the smaller number. The sum of four times the larger and twice the smaller number is 100. If x is the smaller number, which equation below determines the correct value of x? A) 2(2x + 5) + 4x = 100 B) 2(2x – 5) + 4x = 100 C) ...
August 5, 2016

CHEMISTRY
THIS IS THE 3RD TIME POSTING THIS, PLEASE HELP ME ANSWER THIS THE HOMEWORK IS DUE TONIGHT. Write formulas for the compounds that form from In (Assume In charge is 3+.) and each of the following polyatomic ion: NO−3, SO2−4, PO3−4 -3, -4, -4 ARE THE CHARGES. ...
June 24, 2016

CHEMISTRY
THIS IS THE 3RD TIME POSTING THIS. PLEASE HELP ME ANSWER THIS. THE HOMEWORK IS DUE TONIGHT. Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. THE -3, -4, -4 ARE THE CHARGES, CANT TYPE SUBSCRIPT ON...
June 24, 2016

CHEMISTRY
the 3 is the charge
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. APPARENTLY SrNO6, SrSO4 , Sr3PO8 is wrong
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) InNo9, InSO6, AND InP4 is wrong
June 24, 2016

CHEMISTRY
Provide the name of the oxyanion of the acid HNO2(aq) I ENTERED Carbonate ion BUT ITS WRONG
June 24, 2016

CHEMISTRY
no i dont understand the post below or what one you are referring to. i gave my work in the original posting already.
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) In(+3 charge) NO3(-1 CHARGE) SO4(-2 charge) P4(-3 charge) Re posting this a little differently. hopefully someone can ...
June 24, 2016

CHEMISTRY
i posted my work in the original posting
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO3 −1, SO4 −2, PO4 −3. SR (+3 CHARGE) NO3(-1 CHARGE) SO4(-2 CHARGE) PO4(-3 CHARGE) Re posting this question. hopefully someone can help me answer this now. Please ...
June 24, 2016

CHEMISTRY
there copied straight from the question page, this is making sense
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) InNo9, InSO6, AND InP4 is wrong
June 24, 2016

CHEMISTRY
Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. APPARENTLY SrNO6, SrSO4 , Sr3PO8 is wrong
June 24, 2016

math
What kind of triangle is (0,0) (4,O) (0,4)
May 19, 2016

geography
what are the results/effects of poor service delivery socially,environmental and economic problems?
May 1, 2016

Physics
You are enjoying the frictionless frozen surface of the Rideau canal with your friend. While together, you try a physics experiment in which you push off of each other at the same time. If your acceleration is 2 m/s 2, what is your friend’s acceleration, in m/s 2, if your...
April 21, 2016

Physics
You and your friend are pulling a 2.5 kg sled across a slightly rough patch on the frozen Rideau canal, such that there is a friction force of 1.5 N opposing the direction of motion. Assume that you each pull the sled forward from either side with the same force of 9.5 N, at ...
April 21, 2016

Physics
A box is sent up a frictionless inclined (34.2 degrees) plane at an initial speed 3.9 m/s. (a) How much time, in seconds, does it take for the box to stop? (b) How far did the box travel up the plane before it came to a stop?
April 21, 2016

Physics
While in an elevator, you decide to take some weight readings of yourself to determine the elevator’s acceleration. When the elevator is stopped, you read a weight of 59.2 kg. When the elevator is moving, you measure a maximum weight of 63.5 kg, and a minimum weight of 55...
April 21, 2016

Physics
An egg is thrown from the top edge of a 22.9 m high building down onto an unsuspecting person standing on the ground 6.2 m from the base of the building. If the egg is tossed horizontally, at what speed, in m/s, must the egg be thrown such that it lands on the person?
April 20, 2016

algebra
A flagpole has a height of 6565 yards. It will be supported by three​ cables, each of which is attached to the flagpole at a point 55 yards below the top of the pole and attached to the ground at a point that is 3232 yards from the base of the pole. Find the total number...
April 10, 2016

Math
Four angles are put together, forming a straight angle. Two of the angles are the same size. The other two angles are also the same size but different from the other two. If one angle of the four angles is 40 degrees, what are the measures of the other three angles
March 23, 2016

Math
How many posters per minute can each of the student make? Answer:The kids make .05 of poster in 1 minute
March 8, 2016

Calculus - Rates of Change
I do not understand that.
March 7, 2016

Calculus - Rates of Change
A water tank has a shape of an inverted cone with a base radius of 2m and a height of 4 m. If water is being pumped into the tank at a rate of 2m3/min, then find the rate at which the water level is rising when the water is 3m deep. Attempted solution: V= 1/3πr^2h V= 1/3...
March 7, 2016

Science
You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...
March 2, 2016

Math
No, your answer is incorrect. It would either have to be (a)Kenya or (b)Matt. :)
March 2, 2016

Math
You estimate that a puppy weighs 12 pounds. The actual weight of the puppy is 14 pounds. Find the percent error. Round your answer to the nearest hundredth of a percent. Help me Im stuck..!
February 29, 2016

life orientation
How should i advise a friend who reponds to conflict by avoidance on why it is not healthy in sustaining positive relationships?
February 25, 2016

Marketing
Thank you
February 23, 2016

Marketing
distribute the goods
February 23, 2016

Marketing
Distribution of goods takes place by means of channels, and the intermediaries are the independent groups or organizations within the channel that make the product available for consumption. There are four main types of intermediary: agents, wholesalers, distributors, and ...
February 23, 2016

Marketing
don't know? Don't understand the question.
February 23, 2016

Marketing
IT delivers mail and packages from any type of business
February 23, 2016

Marketing
Please need help with this question. Visit these sites and think about the role that they play in the new breed of channel intermediaries. United Parcel Service Roadway Express
February 23, 2016

geometry
One leg of an isosceles right triangle measures 5 inches. Rounded to the nearest tenth, what is the approximate length of the hypotenuse?
February 19, 2016

Maths
The triangle is called ABC. Angle B has an angle of 90 degrees. The length of AB is 15mm and the length of BC is 16mm. Find the length of AC
February 17, 2016

english
Punctuation for The student asked will my learning pattern scores change over my lifetime
February 2, 2016

Science
When I took it and used the answers above I got a F. The right answers are. 1.B 2.D 3.C 4.B 5.D 6.A 7.C 8.B-Nickel, D-rust 9.A 10.B-boiling a mixture, D-using a filter
January 28, 2016

geography
What are three characteristics that mid-latitude cyclones have in common with all cyclones?
January 23, 2016

language arts
They felt free when they ran though the doors.
January 21, 2016

Chem - pH curve
Sketch what the pH curve for soil containing carbonate ion that undergoes continual addition of hydronium ions from acid deposition. Include relevant chemical equations and information that explain the aspects of the ph curve you sketch. Please help!!
January 13, 2016

Algrebra
Given that a(x+7)=24, which expression is equivalent to x? A. 24/a-7 B.24-7/a C. 24/a -7 D. 24-7/a
January 4, 2016

Math
If 36 in. = 1 yd, then 2 1/3 yd =
December 9, 2015

Math please helppp
1 Find the missing angle measure in the polygon A ] 77 B ] 87 C ] 97 D ] 107 i think its b 2 Find the sum of the interior angles in 10 - sided polygon A ] 1,260 B ] 1,440 c ] 1,620 d ] 1,800 i think its c or b 3 Find the measure of each interior angle in a regular hexagon A ] ...
December 4, 2015

Math
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 60 people. (You may need to use the standard normal distribution table. Round your answers to the nearest whole number.) (a) ...
December 1, 2015

Math
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 16. The material is considered defective if the breaking strength is less than 156.2 pounds. What is the probability that a single, randomly selected ...
December 1, 2015

Math
The diameter of an electric cable is normally distributed, with a mean of 0.6 inch and a standard deviation of 0.03 inch. What is the probability that the diameter will exceed 0.63 inch? (You may need to use the standard normal distribution table. Round your answer to three ...
December 1, 2015

Math
An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,600 + 300 ln a (a ≥ 1). How much needs to be spent (to the nearest hundred dollars) to sell 4...
November 24, 2015

Math
Find the sum of the first five terms of a geometric series with g1 = -16, g5 = -38,316, and r = 7.
November 22, 2015

Math
Evaluate the series 12.1 + 13 +13.9 +...+ 32.8.
November 22, 2015

Math
The 1st term of a geometric sequence is 25 and the 6th term is -1/125. What is the 3rd term?
November 22, 2015

Physics
Two vectors F1 and F2 with magnitude F1=42N and F2=70N and where angle1=83 and angle2= 300. The angles are measures from the positive x axis with the counter-clockwise angular direction as positive. What is the magnitude of the resultant vector where F=F1+F2?
November 18, 2015

Chemistry
1. A hypothetical pure element consists entirely of two isotopes. The natural percent abundance of the isotope with mass 25.5 u is 86.1%. The other isotope has mass 29.2 u. Calculate the atomic weight of the naturally occurring element. 2. Suppose that a hypothetical element ...
November 15, 2015

Math
What is the original cost of an item if $129.00 is 80% off?
November 9, 2015

math -4th grade
I believe you are correct for #1. The answer for question #2. You wouldn't be able to have a final score of 1 because the only way you can get 1 point is if you already have 6 points from a touch down.
November 9, 2015

Physics
A 5 g bullet has a speed of 300 m/s and embeds itself into a 500 g block. The block is initially at rest sitting on a rough surface which has a coefficient of kinetic friction equal to 0.5. A) What is the speed of the block after the collision? which is= 2.97 m/s B) What ...
October 15, 2015

pre - algebra
what is the decimal equivalent to 27/100?
October 15, 2015

Algebra 2
Create multiple representations of each line described below A line with slope 4 and y intercept -6
October 13, 2015

Algebra 2
X-3/x=3/5
October 13, 2015

physics help
Three co-linear forces f1=45 N west,f2=63 N east and an unknown force f3 are applied to an object.The resultant force of the three forces is 12 N west determine the magnitude and direction of the force f3 using an algebric calculation(vector addition) answer fres=f1^2 f2^2 12=...
October 8, 2015

math
The temperature dropped 12 degrees Celsius from 10pm to 4am one night. What is the average drop of the temperature 12 divided by 5 = ____
September 30, 2015

Math
Does .0303 equal 303/10,000
September 25, 2015

Math
Thank you. That makes sense. I was doing the order of operations wrong.
September 25, 2015

Math
I need help with this order of operations problem. also x in the problem is the multiplication symbol. 44-4x(5+3x2) I got 44-4x(11) 40x11=440 Am I correct?
September 25, 2015

Science
I have two containers, one is 2ml and the other is 5ml. Which would fill both containers all the way. A.gas B.liquid C.solid D. a combination I believe its A. I am right
September 25, 2015

Physics
A rocket engine can accelerate a rocket launched from rest vertically up with an acceleration of 18.4 m/s2. However, after 49.6 seconds of flight the engine fails. Neglect air resistance and assume g = 9.80 m/s2 throughout the flight.
September 23, 2015

geography(development)
What are the Four Negative results of development?
September 20, 2015

geography(development)
Would you say that the division of the world in the northern and the southern part is based on economic development,sustainable development or social development?
September 19, 2015

chemistry
A sample of a copper chloride of mass 1.425g is treated with a water solution of silver nitrate, and the AgCl formed had a mass of 3.038g. What is the correct empirical formula of the copper chloride?
September 16, 2015

chemistry
how many kilojoules of energy are required to bring 800.0g water from 20.0c to the boiling point. not sure what formula is? 4.184j
September 11, 2015

8th grade math
54 beads
August 31, 2015

Algebra
In the slideshow, Multiplication of rational expressions, located in Chapter 6, the answer results in x in the numerator and x – 5 in the denominator. True or False
August 10, 2015

Chemistry
For a given reaction, the rate constant doubles when the temperature is increased from 27 o C to 49 o C. What is the activation energy?
July 21, 2015

Math
If 5X + x squared > 100 then x is not equal to
July 16, 2015

physical science
40
June 16, 2015

science chemistry
A given mass of helium(gas)occupies a volume of 3,6m^3 at a pressure of 105 kPa.if the temperature remains constant,calculate volume of the gas if the pressure is decreased to 70 kPa.
June 14, 2015

ELA
Of i mean
June 8, 2015

ELA
Oops it's called off mice and men
June 8, 2015

ELA
the story mice of men... chapter four 1.does crooks believe the men will be able to get their farm?
June 8, 2015

physics
Three co-linear forces f1=45 N west,f2=63 N east and an unknown force f3 are applied to an object.the resultant of the three forces is 12 N west determine the magnitude and direction of the force f3 using algebraic calculations. Thank you indvance.
June 3, 2015

Math
trigonometric identities tan^2Ө/sin^2Ө-1=tan^2Ө
May 27, 2015

Biochemistry
1) 5.89 2) 11.47
May 16, 2015

PHI208 Ethics and moral reasoning
In what way would Thomas Hill’s notion of “self-acceptance” correspond to Aristotle’s conception of eudaimonia? A. They both are inherently selfish and contrary to virtue. B. They both require the virtues of arrogance and pride. C. Neither has anything to ...
May 13, 2015

Chemistry
Benzene, C6H6, reacts with nitric acid, HNO3. Two products are formed, one of which is water. The second product has a molar mass of 213 grams. The second product is composed of 33.8% carbon, 1.42% hydrogen, 19.7% nitrogen, and 45.1% oxygen. Write a balanced chemical equation ...
April 17, 2015

physics
4.0m/s^2
April 15, 2015

Chemistry
If 30 ml of 02 M HCL with 45 ml what is the molarity of NaOH
April 9, 2015

Physical Science heat & temp. Chapter
How much heat in calories is required for (2.7 lb) of ice –200 F to be converted to water at 40 F?
April 8, 2015

math
the perimeter of a rectangle is 35.54 inches longer than the perimeter of a square of side 6.75 inches. Find the perimeter of the rectangle to the nearest tenth of an inch.
April 7, 2015

Physics
Determine the amount of energy required to raise the temperature of 250 grams of steel from a temperature of 15 oC to a temperature of 40 oC . The specific heat of steel is 0.11 cal/gram oC.
March 30, 2015

math
sam cut a pie into equal slices. there are only 3 slices left. the angle measure for the three slices is 72 degrees. how many slices did sam cut the pie into?
March 25, 2015

statistis
73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 In terms of differences in heart rates, interpret these data using the following:the range, (b) the variance, and (c) the standard deviation
March 23, 2015

Chemistry
3.05 g of hydrated copper sulfate produce 1.94 g of anhydrous salt. Assuming complete removal of water of crystallisation, determine the formula of hydrated copper sulfate.
March 11, 2015

skills ,concepts and atitude
I took the exam and the answer was correct. Thanks,Ms Sue and Reed
March 8, 2015

skills ,concepts and atitude
It dose not says
March 8, 2015

skills ,concepts and atitude
b.
March 8, 2015

skills ,concepts and atitude
Animal observation and investigations usually begin with A. handling the animal. B. a guiding question. C. feeding the animal. D. an outline of animal behavior. my answer is d.
March 8, 2015

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. Next>>