Thursday
May 26, 2016

Posts by Sasha

Total # Posts: 412

Chemistry
You have a tank of wine that needs a 20 ppm addition of SO2. Answer the following questions. 1. To make 5 gallons of a 6% w/v SO2 solution (expressed as SO2) how much K2S2O5 (222 g/mol) should be weighed out? 2. How much of this solution (in mLs) should be added to the tank (...
April 11, 2016

language arts
What statement in the passage weakens the argument that personal music players cause hearing loss? Experts say more research is needed to prove a definite link between portable music and DVD players and hearing loss. Twenty-nine percent of students reported saying "what&...
December 17, 2015

Math
no problem
November 12, 2015

Math
87.5% or 12.5% not sure sorry
November 12, 2015

math
Is there Distribute Property of Division over addition or subtraction? I have all ready have the information for Multiplication and can you please help as soon as possible as I have a test on this tomorrow!! Thank you.
November 12, 2015

Organic Chemistry
Why is methylene chloride (dichloromethane) used to extract eugenol from cloves, and not toluene?
October 19, 2015

Organic Chemistry
What is the solubility, in mg/mL, of a 50% water/50% methanol solution at 73.5 degrees Celsius? Is there a table available online somewhere?
October 18, 2015

Organic Chemistry
When reading an infrared (IR) spectrum for an unknown compound, you check for certain functional groups in a certain order. If C=O is absent, you check for alcohols/phenols (-OH), then for amines (N-H), then for ethers (C-O, & the absence of -OH). So, I was wondering: If you ...
October 16, 2015

Organic Chemistry
Simple Distillation: What is the molar composition of the vapor in equilibrium with a boiling liquid that has a composition of 60% A and 40% B? I know that the vapor should be richer in the lower-boiling substance, which is A in this case. And: If a sample of the vapor has the...
October 9, 2015

calculus
Find the resultant vector. 1) A force of 35 grams and 45 grams applied at right angles. 57.009 g at 52° with respect to the 35 kg force 2) Velocities of 400 mph due north and 500 mph due east. 640.31 mph at 51° with respect to the 400 mph force 3) Displacements of 90 ...
October 5, 2015

Organic Chemistry
I spotted a commercial TLC plate, coated with silica gel, with a pure benzoin solution. After running the TLC plate in methylene chloride, the benzoin separated into two different spots. Rf values are 0.6 and 0.9. What explains this? A pure material should have only one spot ...
October 2, 2015

world geography
what ethnic group dominate iran and afghanistan
September 29, 2015

world geography
What major cultural feature is common throughout the region? What other cultural features could you use to further divide the Persian Gulf and interior Southwest Asia into more regions?
September 29, 2015

Organic Chemistry
Are n-pentyl chloride and n-pentyl bromide miscible or immiscible? Why?
September 27, 2015

Algebra
If 18g of a radioactive substance are present initially and 8 yr later only 9 g remain, how much of the substance will be present after 20 yr?
September 22, 2015

health
there neexds to be four.?
September 17, 2015

health
what are four things that effect how many servings a person needs of each food group?
September 17, 2015

Organic Chemistry
I have already calculated the volume of ethyl alcohol need to dissolve 0.300 g of sulfanilamide at 78 degrees Celsius. I got 1.429 mL ethyl alcohol. My question is: how do I calculate how many grams of sulfanilamide will remain dissolved in the mother liquor (ethyl alcohol) ...
September 14, 2015

riddle
20 pigeons sat on the branches of a tree. A man hit 1 pigeon with a cannon. How many were left on the tree?
September 12, 2015

alGEBRA 1
the ratio of lemon juice to water in lemonade is 3:7 ,. if 9 cups of water aer used to make a pitcher of lemonade , how many cups of lemon juice are needed
September 12, 2015

alGEBRA 1
how???
September 12, 2015

alGEBRA 1
seven taken away from a number is it a number or varibale?
September 12, 2015

alGEBRA 1
write two verbal expressions for the following: 4+m write a verbal expression for the following;7-y
September 12, 2015

Math algeabra
when i did this problem i got this as my answer1181.102ft/h
September 9, 2015

Math algeabra
im confused?
September 9, 2015

Math algeabra
why wyu
September 9, 2015

Math algeabra
no i dont have it on my chart
September 9, 2015

Math algeabra
i have 100 cm= 1 meter
September 9, 2015

Math algeabra
this is the conversions on the list 60 seconds=1 minute 60 minutes=1 hour 24 hours=1 day 7 days= 1 week 52 weeks= 1 year 12 inches=1 foot 3 feet=1 yard 36 inches= 1 yard 5280 feet= 1 mile 1760 yards= 1 mile 100 centimeters= 1 meter 1000 meters = 1 kilometer 8 fluid ounces= 1 ...
September 9, 2015

Math algeabra
you have to use the conversions that u have on the paper only
September 9, 2015

Math algeabra
i dont have those measure ment on my paper
September 9, 2015

Math algeabra
A tortoise can travel 10 cm per second. what is the turtoise's speed in feet per hour?
September 9, 2015

Physics
Find x and y components of a vector which is 10 units in length and 40 degrees below the +x axis. I honestly don't even know how to begin this problem .. Please help me !
June 15, 2015

Math (PLEASE HELP!)
So answer to b would be 24?
June 6, 2015

Math (PLEASE HELP!)
The temperature of an enclosure for a pet snake should be about 27°C, give or take 3°C. (show your work) a) What absolute value expression can be used to represent this situation? b) Use the expression to determine the temperature range the enclosure should have.
June 6, 2015

Math
The temperature of an enclosure for a pet snake should be about 27°C, give or take 3°C. (show your work) a) What absolute value expression can be used to represent this situation? b) Use the expression to determine the temperature range the enclosure should have.
June 6, 2015

Math
No, the answer is two solutions, Correct?
June 1, 2015

Math
Is it no solutions?
June 1, 2015

Math
I still don't get it... Should I graph them as points? Because when I graph just x=-1 and ect... I get straight lines going up and down at the following points, (-1,0), (0,0),(1,0),(2,0),(3,0).
June 1, 2015

Math
How many real number solutions does the equation have? y=3x^2-5x-5 A)one solution B)two solutions C)no solutions D)infinitely many solutions I can't figure this question out. Any help would be amazing.
June 1, 2015

Math (check answers)
Oh great! Thank you so much!
June 1, 2015

Math (check answers)
Since the opening night, attendance at Play A has increased steadily, while attendance at Play B first rose and then fell. Equations modeling the daily attendance y at each play are shown below, where x is the number of days since the opening night. On what day(S) was the ...
June 1, 2015

Math (check answers)
1)Identify the sampling method. You want to determine the number of text messages students at your school send in a month. You go to the cafeteria and randomly ask students as they come out of the lunch line. A)Random*** B)Systematic C)Stratified D)None of these. Would the ...
June 1, 2015

Math (check answers)
Thank you so much!
June 1, 2015

Math (check answers)
1)What is the simplified form of the expression? 5d^6*d^-12? A)5d^-72 B)6d^-72 C)5d^-6**** D)6d^-6 I think that the answer is C. If anyone could tell me if I am correct that would be great.
June 1, 2015

First Nations Studies 12
Activity Sheet 5-10. Analysis: Louis Riel's summation to the Jury speech. Please someone help me with these questions if you can please!! I REALLY NEED THE HELP!!!??? What information is left out of his speech? What other sources of information could you use for comparison...
May 25, 2015

math
Mary wants to build a fence in the yard to keep her dog from running away. She only has 60 feet of fencing. If she wants to create a rectangular space that has a length that is twice as long as the width. How long is each side of the rectangular space?
May 17, 2015

Science 8
I need help with the same question
May 17, 2015

Math
Hi! I know I am asking a lot since this is a huge question, but I was wondering if anyone could help or walk me through it. I totally understand if you do not want to help. But I am really confused and any help at all would be amazing. Thank you! You are writing an article on ...
May 14, 2015

Chemistry
a. You are going from 3 moles of gas to 2 moles of gas and 3 moles of solid. So, you are decreasing the number of moles of gas particles, so the entropy would decrease, giving a ΔS < 0. b. Here, you're going from 2 moles of gas to 3, so ΔS would probably be ...
May 14, 2015

Math
My answer is A. Is that correct?
April 29, 2015

Math
1) Which sum best represents the model shown below? There are 3 blue blocks, and each of them separately equal x^2. There are 2 green blocks that each separately equal x. There are 2 red blocks that each separately equal -1. And there is 1 yellow block that equals 1. A) 3x^2+...
April 29, 2015

Math
1) Which expression represents the perimeter of the triangle drawn below? The triangle has (x-1) on the left side. (x+2) is on the bottom of the triangle. (2x-4) is on the slanted top. A) 3x-3 B) 3x-5 C) 4x-3 D) 4x-5 I do not know how to do this, so help would mean so much to ...
April 29, 2015

math
if $6000 is invested at 3% compounded quarterly, what is the amount after 6yrs?
April 28, 2015

College Algebra
So the maximum area is the vertex? Is the vertex 200, 1000? And the dimensions in order to maximize the area enclosed are 200, 125?
April 27, 2015

College Algebra
A rectangular enclosure is to be constructed with 2,000 feet of fence in order to have four sections, as in the diagram below. What should be the dimensions in order to maximize the area enclosed? What is the maximum area? (So the diagram is just four rectangles connected side...
April 27, 2015

Inequalities Interval Notation
Solve: (2 + x)(5 + x)(4 - x) < 0 (write answer in interval notation) Which I think is xe (-infinity, -5) or (-2, 4) and Solve: (4x + 1)(3 - x) > or equal to 0 (write answer in interval notation) Which im unsure
April 27, 2015

College Algebra
A large hotel finds that it can rent 95 rooms when it charge $100 per room. For each $1 increase in room cost it rents one room less. (Likewise, for each $1 decrease in room cost it rents one room more) What price should it charge in order to maximize the revenue? Well, ...
April 27, 2015

english
D . is the right answer because I just took the test!
April 15, 2015

science
1) How do decomposers increase the fertility of soil? A) By storing moisture in the soil. B) By breaking down and digesting the remains of dead organisms. C) By making spaces for air and water. D) By burrowing deep below topsoil. I am thinking is is either B or D, but I do not...
March 23, 2015

Physics Honors
A 47.0 g golf ball is driven from the tee with an initial speed of 48.0 m/s and rises to a height of 23.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 8.0 m below its highest point?
February 13, 2015

Physics Honors
A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 1.90 m above the floor with a speed of 7.40 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air resistance, a ...
February 13, 2015

GEO
C. stopping French nuclear testing in the region. Just took the test!
February 2, 2015

chemistry
5*18=90g
January 15, 2015

Physics
A pond is 12 metres across. The crests of two successive waves are 60.0 cm apart and they each move across the pond in 15 seconds. a)What is the velocity of the waves? b)What is the frequency of the waves? c)What is the period of the waves?
November 23, 2014

chemistry
What is w when 3.37 kg of H2O(l), initially at 25.0oC, is converted into water vapour at 111oC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL. (Remember to include a "+" or &...
November 3, 2014

chemistry
The enthalpy change for the reaction below at 25oC is -2,252 kJ (per mole of C11H24). What is the internal energy change for the reaction at 25oC? 11 CO(g) + 23 H2(g) --> C11H24(l) + 11 H2O(l)
November 3, 2014

chemistry
A 0.009298-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 27.1oC. If the heat capacity of the calorimeter is 4.84 kJ (oC)-1, then what is the constant volume heat of combustion of this ...
November 3, 2014

PHYSICS
Use dimensional analysis to determine the pressure, P, in the pipe to within a dimen- sionless multiplicative constant of order 1.(Hint: P may depend on another physical variable besides A and R.) Using your result from part (a), reexpress your answer in a form that involves v...
September 21, 2014

physics
Use the formula F=kQ1Q2/r^2. Q1+Q2=200*10^-6 C 200*10^-6 C - Q1=Q2 substitute Q2 into the top formula and solve the equation.
September 1, 2014

Physics-half way fin.
A person was shot vertically upward from a cannon with a mass 52 kg and a speed of 35 m/s. a) what was the height according to conservation of energy and b) what was the person's total energy? (TME never changes!) a) used TMEo=TMEf height= 63 m. b.)Would I use PE=mgh
June 21, 2014

Physics-check plz
If a pitcher throws a fast ball with a speed of 35 m/s. The ball has a mass of 220 grams. a) how much work was done in throwing the ball? b) If the catcher catches the ball by moving his mitt 15 cm. backward what force did he exert? a.) Throwing the ball in a positive ...
June 20, 2014

AlgebraII( Probability)
1)a number less than 35 is chosen. 2)A prime number is chosen. 3) A multiple of 4 is chosen. 4)A perfect cube is chosen. Please help me.
April 27, 2014

Electricity
Refrigerators requires a lot of electricity and uses the most electrical energy in most households. Why do refrigerators require so much energy to be operated?
April 8, 2014

Computers
jghhgfi
March 17, 2014

Personal Dimensions of Education
THE ANSWER IS "IS"
February 16, 2014

Math
Grace painted 1/3 of the wall. Sarah painted 2/5 of the wall. How much of the wall have grace and sarah painted ?
January 23, 2014

geography
d. Singapore is a major manufacturer of computer hard drives. Just took the test.
January 20, 2014

Algebra 2
Ans: a. the matrix will have the same signs of the coefficients of the equations.
January 9, 2014

arithmetic sequences
the initial game costs 50 cents. ANS= 50 + 25x = 50 + 25(9) = $2.75
January 9, 2014

physical science
45mph*5280ft/mi*1m/3.2808ft*1hr/3600s speed limit= 20.12 m/s the speed limit is less than the speed of the car. yes, the car exceeded the speed limit.
January 9, 2014

math
24
January 9, 2014

Anyone please help(math)
Question 1: ANS: a. 7 Question 2: ANS: a. 4 Question 3: ANS: d. 3
January 9, 2014

Pre-Algebra
The ratio of men to women at a lecture is 2 to 5. A total of 63 people are at the lecture. How many are men?
January 9, 2014

Early Childhood Education
b. fit into natural daily routines.
November 16, 2013

Early Childhood Education
When designing IFSP objectives, its useful to parents to think of skills that a. are short and easy. b. fit into natural daily routines. c. are most useful in promoting ambulation. d. are taught in isolation to maximize chances of progress.
November 16, 2013

math
1. The world population in 1992 is 5.42 billion. If its population doubled every a. 41 years, what would its population be in 41 years? b. 41 years, what would its population be in 82 years? c. 82 years, what would its population be in 164 years?
November 12, 2013

math
i got that but i was not sure about b)b. How long do you have before you must act or have your pond covered with the plants?
November 12, 2013

math
The area covered by water lilies in a pond you own doubles in size every day. If allowed to grow the plants would cover the entire pond surface in 30 days. You had decided to do nothing until the pond is ½ covered. a. On what day will the pond be ½ covered? b. ...
November 12, 2013

english-satire
so i am doing a satirical essay , similar to that of swift's modest proposal.I want to talk about obesity, and i have an idea of showing it in a positive way, as in some nations in the past and present being chubby/fat is seen as prosperity and success.What kind of ...
October 29, 2013

sciencee!
What natural zone are each of these cities or areas in? Los Angeles, Palm Springs, Santa Monica Mountains, Catalina, San Francisco, Yosemite --choices are-sierra transitional zone, humid transitional zone,upper sonoran, lower snoran, redwood belt, grasslands,and mountains
October 20, 2013

science.please help!
Would you expect to find the humid transitional zones on the coast or inland? Northern or Southern part of California?
October 20, 2013

Environmental Science
Would you expect to find the humid transitional zones on the coast or inland? Northern or Southern part of California?
October 20, 2013

Physical Science
36.5 lbs
October 15, 2013

Physical science
Vf=Vi+gt Vf= final velocity (what we're solving for) Vi= initial velocity (in our problem, initial velocity is zero because the rock starts from rest) g=gravitational acceleration (9.8m/s/s) t= time (in our case, 3.5s) Vf= 0m/s + (9.8m/s/s)(3.5s) Vf= 34.3m/s downward (you ...
October 8, 2013

Early Childhood Education
Which of the following should not account for rapid gain in overall brain size after birth. a. number of neurons b.swelling due to rapid muscle growth c. The growth of dendrite trees d. myelinization I chose answer a.
September 21, 2013

Early Childhood Education
A needs and services plan is a. written by a pediatrician b. only for infants and toddlers with special needs c.a plan discussed by parents and caregivers upon entry into an infant-toddler program d. a formal plan to serve children that is made by the program and a regulating ...
September 21, 2013

chemistry
A 20.9 g sample of nitrogen gas combines completely with 4.5 g of hydrogen gas to form ammonia. What is the mass of ammonia formed? A 12.7 g sample of X combines with a 24.4 g sample of Y to form the compound XY2. What is the mass of the reactants?
September 15, 2013

math
thank you so much steve
August 25, 2013

math
K is the midpoint of JL JL=4x-2 and JK=7. find x, KL, and JL. Very confused , can you please show steps to working out the problem
August 25, 2013

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