Questions Asked on
August 23, 2010

math
write 480 in a) 1 significant figure b) 2 significant figures c) 3 significant figures d) 4 significant figures
asked by Jack 
Math
Determine the equation of the parabola with roots 2+sqrt(3) and 2sqrt(3), and passing through the point (2,5).
asked by Emily 
chemistry
what mass of solid AgBr is produced when 100.0 mL of 0.150 M AgNO3 is added to 20.0mL of 1.00 MNaBr? i keep getting the answer 3.75 g however when i checked in the back of the book it gives me 2.82 g.. can you please explain the universal steps for me
asked by Crickett 
math
which has greater volume? a) 1.0 kg of feathers or 1.0 kg of lead b) 100 g of gold or 100 g of water c) 1.0 L of copper or 1.0 L or mercury
asked by Jack 
Math
a 25.00 gram sample is placed in a graduated cylinder and then the cylinder is filled to the 50.0 mL mark with benzene. the mass of benzene and solid together is 58.80 gram. assuming that the solid is insoluble in benzene and that the density of benzene is
asked by Anne 
MATH
what happend to ray floob after he fell off the empire state building
asked by Arely 
physics
How do the pressure variations with depth affect our ability to explore the ocean? Consider the challenges of scuba diving and submarines.
asked by Anonymous 
algebra 1
An item costs c dollars and 6% sales tax is charged The total cost including sales tax is given by the expression 1.06c you are buying a skateboard that cost $75 what is the cost of the skateboard
asked by Brandon 
algebra
a farmer is taking her eggs to market in her cart, but she hits a pothole, whick knocks over all the containers of eggs. Though she herself is unhurt, every egg is broken. So she goes to the insurance agent who asks her how many eggs she had. She says she
asked by Jean 
chemistry
what is the pH of the buffer when 4ml of 1M HCl is added to a 100ml buffer solution made using 5ml 1M Na2HPO4 and 5ml 1M NaH2PO4? The pKa for H+ + HPO4 ==> H2PO4 is 6.82. What would happen to the pH if the 100ml buffer had been made up at the starting pH
asked by matt 
math
is this anwer correct 9a^2b + 3c + 2a^2b + 5c = ANSWER : 11a^2 + 8c^2 9a^2b + 2a^2b= 11a^2 3c+5c = 8c^2 so the answer IS 11a^2 +8c^2 there are choices a) 19a^2bc b) 11a^2b+8c c) 11a^4b^2 +8c^2 d) 19a^2b^2c^2
asked by kamleen 
Chemistry
How can i rearrange this ClausiusClapeyron equation so that 1/T2 is on one side? In P2/P1=delta H vaporization/R (1/T2 1/T1) I am trying to find at At what temperature does acetone have Pvap= 111 mm Hg. Acetone, a common laboratory solvent, has Delta H
asked by Sar 
Chemisty (Sig Figs)
Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them. (a) 3.149 e3 to 3.2 e3 Its incorrect but I
asked by Hannah 
physics
to tighen a nut you exert 15N of force on wrench, which is a distance of 0.50m from pivot point. calculate amonut of torque produced...
asked by deb 
Physics  Satellite Motion
The polar orbiting environmental satellites (POES) and some military satellites orbit at a much lower level in order to obtain more detailed information. POES complete an Earth orbit 14.1 times per day. What are the orbital speed and the ltitude of the
asked by Shaila 
physics
Is the acceleration due to gravity more or less atop Mt. Everest than at sea level? Defend your answer.
asked by Anonymous 
Math
Tom drives 24 miles north to Jamesville. He then continues 35 miles to Karisville, 16 miles to Louistown, and 18 miles to May City. How far is May City from Jamesville?
asked by Ashley 
Math
Convert each of the following repeating decimals to form, where a, b are integers and b „j 0 a) 0.4 with line on the four b) 1.396 with line on the six
asked by Anonymous 
chemistry
what mass of solid AgBr is produced when 100.0 mL of 0.150 M AgNO3 is added to 20.0mL of 1.00 MNaBr? i keep getting the answer 3.75 g however when i checked in the back of the book it gives me 2.82 g.. can you please explain the universal steps for me
asked by Crickett 
algebra
The total sales made by a salesperson was $25,000 after 3 months and $68,000 after 23 months. Using an equation for the line whose graph depicts this data, predict the total sales after 40 months
asked by allice 
Science
In an experiment, 200 g of aluminum at 100degrees celsius is mixed with 50.0g of water at 20.degrees celsius, with the mixture thermally isolated.(a)What is the equilibrium temperature?What are the entropy changes of(b)the aluminum,(c)the water,and(d)the
asked by lungi 
Physics  Planetary Motion
The planet Neptune has an orbital radiu around the sun of about 4.50 * 10^12m. What are its period and its orbital speed?
asked by Shaila 
math
14m^2n  6m^2n = 146=8 8m^2n
asked by kamleen 
Chemistry
How can i calculate the concentration of each ions remaining in the solution after precipitation is complete? ok heres the full question:: 2KOH + Mg(NO3)2 > 2KNO3 + Mg(OH)2 a 100.0 mL aliquot of 0.200 M aqueous potassium hydroxide is mixed
asked by Crickett 
economics
(Growth and the PPF) Use the production possibilities frontier (PPF) to demonstrate economic growth. a. With consumption goods on one axis and capital goods on the other, show how the combination of goods selected this period effects the PPF in the next
asked by Gary 
math
write two equations that prove the associative property is not true for the subtraction
asked by trevor 
Home Inspection
which of thw following statements are false? A. Technical knowledge of home inspection is far more important than communication skills B.After completion of the home inspection course it's necessary to gain field experience by inspecting homes with an
asked by Gilley 
math
Simplify 2 3/18+5 3/12 4 2/4= a)2 11/12 b)7 1/12 c)7 1/3 d)3 1/1 IS d correct ?THANK YOU:))))
asked by vedrana 
math,chemistry
How much water should be added to 1 liter of 0.12N HCl to prepare exactly 0.1N HCl?
asked by jc 
chemistry,math
One liter of approximetely 0.25N HNO3 has been prepared. Upon titration it was found that 5.0 ml of the acid required 11.0 ml of 0.10N NaOH for neutrality. How much concetrated HNO3 at 15.8N must be added to one liter to make it exactly 0.25N?
asked by jc 
AED 201
What is one principle from the INTASC Principles that you feel you must improve the most to be effective in the education profession? What existing professional development programs might you pursue to address the need to improve in this area? I have
asked by Jessica Fuentes 
Chemisty (Sig Figs)
79.7 + 890.43  23 = 9.5 e2 its wrong and I am suppose to correct it.
asked by Hannah 
Math
What would be the correct answer to this question? How do you find out the unknown factor in a multiplication problem?
asked by sue 
chemistry A.P.
write an expression for the quantity 506 00 in which it is clear that all zeros are significant
asked by Cat 
Math
A woman sells 18 containers of milk a day. Each container holds 22 quarts and a quart of milk weighs 1 1/2 pounds. If each of the cows give 25 pounds of milk a day, then at least how many cows must she have?
asked by Hannah 
5th grade math
what number is 10,000 less than 337,676 in number sense?
asked by heather 
3rd grade
What is the Predicate of a Sentence
asked by Jennifer 
chemistry
Assuming that there is an adequate supply of phosphorus atoms, how many P2O5 molecules can be made from 20 molecules of O2 ?
asked by Anonymous 
english
Please can anyone help me understand how metaphor is being used in the poem, "Tableau".
asked by bindiya farswani 
math
From a base elevation of 6300 ft. a mountain peak rises to a summit elvation of 14366 ft. over a horizontal distance of 15844 ft. Find the grade of the peak. The grade of the peak is ?%I do not even know where to begin with this. Does the 6300 ft.get
asked by barb 
Maath
Solve the equation for the indicated variable. 4x3a(10x+7a)=0 solve for x
asked by Courtney 
Math
A boy started on a trip across a lake by motorboat. After he had traveled 15km, the motor failed and he had to use a banca for the remaining 6 km to his destination. His average speed by motor was 4kph faster than his average speed while rowing. If the
asked by kay 
Maath
Solve the equation for the indicated variable. 5(4r3c)2(7r9c)=0 solve for r
asked by Courtney 
math
find the slope if any: x+8y=16 x+0=16 x=16 0 +8y=16 8y=16 8y/8=16/8 y=2 this is the part that loses me: 02=2 160=16 2/16=1/8 is this correct? If not can you help me?
asked by barb 
spanish
Caundo estas muy cansado por las mananas, que haces?
asked by courtney 
Psychology
Basic arthmetic is not an easy task for Jeanne. In fact, she has to work hard at understanding mathematical concepts. She finds it hard to believe that basic math skills are: A) present in all species B) A natural inclination, because they relate to
asked by Rina 
6th grade
what assumptions do different groups have about power,authority,governance,and law?
asked by melea 
psychology
Parents can help their children acquire language by: a) reading and talking with them b) correcting every grammatical mistake c)placing them in front of a computer d) eating foods rich in vitamin A Am confused between b and c but i am leaning more towards
asked by Rina 
Chemisty (Sig Figs)
this is my last question for the whole assigment and im soo glad!!! (9465 + 45  9.9) 8.1 X 10^6 i got 76950.e6 it said it was half right and said check your number of sig figs
asked by Hannah 
math
how do you find the domain of f if f(x)= (2x3)/(4x+5) Thank you
asked by Sydney 
U.S. History
What made the southern colonies economy possible?
asked by Rebecca 
math
how do you sketch a line with these characteristics: m>0 and b
asked by valerie 
math
why it is not possible for a right triangle to have the following three sides: 12 feet, 18 feet, and 14 feet. I need help because I am confuse. Thanks in advance.
asked by jessica 
math
How much more money would I have if I invested $14,000.00 for 8 years at 6.4% in an account that compounded annually rather than in an account that just earned simple interest? Why is this?
asked by jessica 
math
how do you find all the intercepts from these functions: 1. f(x)= (2/3)^x 2. f(x)= ln(x)
asked by Gaby 
math
It took a faster runner 10 sec. longer to run a distance of 1500 m than it took a slower runner to run a distance of 1000 m.If the rate of the faster runner was 5 m/sec more than the rate of the slower runner,what was rate of each?
asked by jack 
Psychology
Discuss the prevalence and effects of Foetal Alcohol Syndrome (FAS) in South Africa with reference to either Erikson’s theory of socioemotional development or Piaget’s theory of cognitive development. Identify at least one risk to normal
asked by Cathy 
MATH
When x is 0 for the equation y=10/x, y is obviously 0. How can i explain why this happens in words? and i know that division is finding how many times one number is contained in another. Is it 10 goes into 0, 0 times or 0 goes into 10, 10 times?
asked by Marianne 
place values in math
i need to see how the place value chart goes from one to one billion
asked by Alize 
st paul (math college algebra)
rational expessions 7/38/12x8
asked by love 
psychology
evolution has installed tendencies in our selection of a mate. Two of the strongest predictors in human mate selection today are: a) wealth and attractive b) attractiveness and youth c) similarity and proximity d) the best genetics and submission i chose A
asked by Rina 
Physics  Geostationary Satellite
Why must a geostationary satellite orbit over the equator?
asked by Shaila 
Physcis  Planets
How could you discover a planet without seeing it with a telescope?
asked by Shaila 
math
how would i construct a truth table for ~q then p (or arrow p)
asked by erica 
math
3x + 2y + 16x^3z + 6y = ANSWER: 19x + 8y + 3z
asked by kamleen 
math
how would i construct a truth table for (p and ~q) double arrow q (sorry inexperienced with the symbols and keyboard shortcuts).
asked by erica 
math
14m^2 n^3 + 6 m^3 n^3 3m^2 n^3 = ANSWER: 23m^6 n^9
asked by kamleen 
english phonetics
Hello I was wondering if my answers for my phonetics assignment were correct... Articulatory  deal with manner and place of articulation of sounds pronunciation problem  the student pronounces "pale" instead of "fail" MANNER AND PLACE OF ARTICULATION?
asked by Jess 
algebra
if you went 10000 meters in 25 min what is the average speed
asked by charles 
math
5p^2t x 3p^3t = 5x3=15 ANSWER: 15p^2t
asked by kamleen 
physics
A ladder 8.65 m long leans against the side of a building. If the ladder is inclined at an angle of 63.0° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?
asked by Kayla 
math
3x + 4y = 2 x6y = 8 3 x 6 + 4 x 1 = 2 2  6 x 1 = 8
asked by kamleen 
english
What is the figurative language for this phrase? " I want a lodge that is round like the sun and the path of the stars. I want a lodge that is like the good things that have no end."
asked by Taylor 
Physics  frames of reference
A car turns off the highway onto a curved exit ramp. a) What type of motion does the passangers' fram of reference experience relative to the ground? b) Explain why the passangers feel a force to the right as the car turns. c) How would an observer on an
asked by Shaila 
algebra
if you went 10000 meters in 25 min what is the average speed
asked by charles 
physics  newtons 3rd law
According to Newton's third law, for every action force there is a reacgtion force, then how can a team win a tug of war contest
asked by Shaila 
physics  uniform circular motion
Explain why the kinematics equations which describe the motion of the object that has constant acceleration cannot be applied to uniform circular motion.
asked by Shaila 
psychology
sara overhears her 21 year old son, joe, telling his friends on the phone that he wants to have sex with two girls he just met at the mall. joe's desire: a) expresses the male tendency to commit to a relationship b) is an example of male nurturance
asked by Rina 
health psychology
hi. I want to know how health psychology help me to understand myself better?
asked by xhajix 
history
who was samuel jackson
asked by history 
math
is this anwer correct 9a^2b + 3c + 2a^2b + 5c = ANSWER : 11a^2 + 8c^2
asked by kamleen 
math
3x + 2y + 16x^3z + 6y = ANSWER: 19x + 8y + 3z
asked by kamleen 
math
14m^2 n^3 + 6 m^3 n^3 3m^2 n^3 = ANSWER: 23m^6 n^9
asked by kamleen 
math
14m^2 n^3 + 6 m^3 n^3 + 3m^2 n^3 =
asked by kamleen 
math
(4D^2 + 7e^3 + 12f) + (3d^2 + 6e^3 + 2f) ANSWER:7d^2 + 13e^3 + 14f
asked by kamleen 
math
tell of each is greater than, less than, equal to 1,000. 8 boxes of 1000 counters.
asked by nicole 
psychology
Peter and Maria are adopting a child whose biological parents have low IQs. They want to know if this child, too is likely to have a low IQ? Which one of the following is the best response to their question? a) While IQ is heritable at least in part,
asked by Rina 
math
5p^2t x 3p^3t = 5x3=15 ANSWER: 15p^2t
asked by kamleen 
math
4x2=10 4 x 2  2 =10 B=10
asked by kamleen 
math
find the value of the variables 5y+8=21
asked by robert 
math
3x + 4y = 2 x6y = 8 3 x 6 + 4 x 1 = 2 2  6 x 1 = 8
asked by kamleen 
MATH
find the cicumference of a circle a if its radius is 3mm c= 2 pi r c= 2 pi 3 3 x 2 = 6 Answer 6 pi mm
asked by kamleen 
geology
Granite comprising Stone Mountain crystallized from magma tens of kilometers within the Earth, but uplift and erosion has since laid this pluton bare. Assuming that erosion has only slightly modified the original shape of the more durable granite body,
asked by Anonymous 
math
The unpaid balance of Dave's credit card is $295, and the finance charge is 4%; what is the new balance of the credit card including Dave's additional purchase of $75? A) $382.80 B) $381.80 C) $ 306.80 D)$ 370 IS A?THANK YOU:)))
asked by vedrana 
Phisic
A driver runs to the south at 20 m / s for 3 min, then turns west and runs to 25 m / s for 2 min, and finally turns to the northwest at 30 ni / s for I min. Find in this movement, 6 min, (a) the displacement vector the driver, (b) the speed climb and the
asked by EXCEL 
History
Imagine yourself to be a woman belonging to the third estate and you are also an active member of the society of revolutionary and republican women.Describe in about 250 words your aims activities social life etc
asked by Moulshree 
Genes
Genetics and what we inherit from our biological parents play a significant role in our intelligence level. In fact, researcher have found that: a) adotpted children are more similar in IQ to their adoptive parents than to their birth parents b) identical
asked by Rina 
english
i need a story to write and i am in 6 th grade so can you tell me a story that was never tould or you made up but it has to be 2 pages long.
asked by ashley 
Science
By throwing a ball at an angle of 50 degrees, a girl can throw it a maximum horizontal distance of R = 38 m on a level field. (a) How far can she throw the same ball vertically upward? Assume that her muscles give the ball the same speed in each case. (b)
asked by Heather 
math
Select what you consider to be the most appropriate form for displaying the data. For each set, develop and appropriately label a graph. Then write a short paragraph jusifying your selection. STRESS UNITS of VARIOUS LIFE EXPERIENCES EXPERIENCE: STRESS
asked by Sarah 
7th grade social studies
in the feudal system of Europe, lords owed their loyalty to the ???
asked by tim 
social studies
profits from trade helped strong ??? develope in east africa
asked by tim 
physics
How is it that ships made largely of steel can float when the density of steel is much higher than the density of water? Why is it possible to make oil tankers much larger than other ships?
asked by Anonymous 
english
the site that you gave me did not work i need a story plaease i am crying right now and the story is due tommorow
asked by ashley 
home inspection
which of the following statements is true? A.most home inspection requests come from real estate professionals B.more home inspections are performed for relocation companies than for any other type of client C.the law requires a home inspection prior to
asked by sib 
Chem
Why does the reaction of (Z)butenedioic acid (fumaric acid) with 1,3cyclopentadiene give only one product? I don't know where to start. Thanks.
asked by Rob 
math/chem
it is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g/metric ton. a metric ton is 1000kg. at this concentration, what mass of uranium is present in 1.0 mg of earth's crust?
asked by Joe 
english
i am crying because i need a story please give me a story and it has to be 2 pages long but the site that mrs.sue or who ever gave me it did not work
asked by savvanah 
Science
I am supposed to write a brief paragraph after watching a certain show (which I did), but in it, I am supposed to include if I found the show interesting, what I learned that fascinated me the most, and what program I would create for the series. How can I
asked by scienceperson 
Cost Accounting
Please somebody can help with the steps of this problem: Thank you (Comprehensive) Construction Company uses a job order costing system. In May 2008, company made a $1,650,000 bid to build a pedestrian overpass over the beach highway in Gulfport,
asked by Josephine 
3rd grade
I do I find the sum of a digit?
asked by Ines 
Sociology
Western companies often impose western culture on the country in which the business is launched. Locate an article that contains a similar situation as WalMart and summarize the findings. What is your analysis of the situation? How could this have been
asked by Jerimiah Ferriman 
Math
A person exercises for a total of 25 minutes. Of the 25, 20 minutes is at Level 2. Of the 25, 5 minutes is at Level 3 What is the average level for the 25 minutes? Provision of a formula for future problems like this will be appriciated.
asked by Ignatz 
6th grade English
the shiny red car and the bicycle. I have to tell whether the sentence part can be used as a subject or a predicate then use the part in a sentence.
asked by Jake 
chemistry
How can i calculate the concentration of each ions remaining in the solution after precipitation is complete? ok heres the full question:: 2KOH + Mg(NO3)2 > 2KNO3 + Mg(OH)2 a 100.0 mL aliquot of 0.200 M aqueous potassium hydroxide is mixed
asked by Crickett 
Graduation
Is graduation transition a graduation requirement for which a student receives four credits but not a formal percentage?
asked by Anonymous 
english 105
there should be commas around "however" in the following sentence " Dewayne had planned to take the last flight out to chicargo It was cancelled, however, because of bad weather.”
asked by Lucy 
Art
Does anyone know how I can make a 3D poster?Thanks
asked by Shadow 
11th grade
how much space does 150 g of mercury occupy
asked by barbie 
economics
18. (Shifts in the PPF) Terrorist attacks foster instability and may affect productivity over the short and long term. Do you think the September 11, 2001, terrorist attacks on the World Trade Center and the Pentagon affected short or long term
asked by Gary 
math
if i know the domain of an equation is any real number except 3/7 how can i express it in interval notation? Thanks!
asked by leslie 
4th grade
explain how you can find the difference 12070 using mental math. then name the difference
asked by blaine 
math
7v10 given that 9v9=9 simplify the answer. I do not understand the question, can someone help pls.
asked by Peggy 
MATH!
4 SQRT(2x3) < 12 please show how you find this! thanks!
asked by confoosed 
math
what is the domain for f(x)= 1 / (x^34x)? Thanks!
asked by emi 
PreCalc
Rebecca and Tom Payton have decided to buy a home that costs $200,000. The Paytons can put down 20% of the home's price. They have applied for a 15year, 9% FRM to finance the balance. They Paytons have a combined gross annual income of $70,000. How much
asked by Anonymous 
math
explain how you can find the sum 25+59 without using pencil and paper or a calculator. then find the sum
asked by trevor 
Geometry
A wheel with a radius of 13 rolls along level ground and makes 4 1/2 revolutions per second. Assuming the circumference to be 3.1416 times the diameter, how far does the wheel travel in 8 seconds?
asked by Anna 
10th grade
I need help with this problem. (b+7)(b+1) .
asked by Si 
sig figs
each of the following were suppose to be rounded to two sig figs. mark then correct or incorrect. if incorrect state the correct answer 1) 1.249 103 to 1.3 103 i know its wrong but i don't know the correct answer 2)7.999 102 to 80 its wrong and i thought
asked by Sara p. 
math
what's the expression for 6p16 if p=3?
asked by katie 
Math
If a cubic foot of water weighs approximately 62.5 pounds, find the weight of the water in a swimming pool which is 16 yards long and 12 yards wide with water to a depth of 7 feet. Answer to the nearest ton.
asked by Jon 
English
1. How about wearing something bright? 2. How about wearing bright color? 3. How about wearing brignt colors? 4. How about wearing a brightcolor shirt? (Are they all grammatical? What other expressions can we use?)
asked by rfvv 
6TH GRADE ENGLISH
I HAD TO CREATE A STORY CAN UP CHECK AND HELP ME WITH ANY GRAMMAR ERRORS. Once upon a time there was a girl by the name of Lexi that was so excited about starting school. Lexi has always dream of what it would be like, when she begin middle school. Lexi
asked by TEE 
Books
Homework Help!!! (Books)? I have a homework assignment and I really need help. I'll be very thankful and pleased if anyone can help. Compare the Adventures of Huckleberry Finn to The Glass Castle mainly the characters and the challenges they face through
asked by Ethan 
English
1. Sometimes I'm sad. 2. I am sometimes sad. 3. I am sad sometimes. 4. Sometimes I feel sad. 5. I sometimes feel sad. 6. I feel sad sometimes. (Are they all grammatical?)
asked by rfvv 
algebra
The perimeter of a rectangle is 128m the length is 4m more than twice the width
asked by Jeff 
math
What does a ~ line above a = sign mean in Geomentry,
asked by Luke 
Algebra
2{3x(x3)}=3(x3) Can you please show me the steps on how to do this.
asked by Melonie 
algebra
5/4x + 1/8x = 3/8 + x = X =
asked by Bubba 
geometry
The length of a certain rectangle is 4 meters more than three times its width. If the perimeter of the rectangle is 56 meters, then the width of the rectangle is
asked by Anonymous 
Math
$100 is deposited in a savings account that pays 4% interest compounded annually. A) how much is in the account after 5 years? B) use logarithms to determine how many years it will take for the account to grow to $1000. Could someone show me how to do this
asked by Shannon 
math
Substract. 10 3/5 2 10/11 a)8 38/55 b)7 c)743/55 d)7 38/55 IS A RIGHT ANSWER?THANK YOU:))))
asked by vedrana 
Statistics
In a study to estimate a population mean, i start with a sample size 10 and calculate the 95% confidence interval. Suppose i am not satisfied with the size of the confidence interval and want to reduce it by half. Give an estimate of sample size that i
asked by Zodra 
algebra
2x + 3y is less than or equal to 6 solve b=6c for c The length of a rectangle is fixed at 15cm. What widths will make the perimeter greater than 80 cm? solve the compound inequality: 6>5x + 5 or 10 is less than or equal to 5x+4
asked by Bubba 
PreCal
What is the domain, range, zeros, symmetry, and is it even/odd of these functions? (how can you tell, i don't remember how you get all these, refresher please) y= 1/x y=[x] y=sq rt. of x^2 4 y=sin x y=cos x y=tan x
asked by Amanda 
math,science,lab
One liter of approximetely 0.25N HNO3 has been prepared. Upon titration it was found that 5.0 ml of the acid required 11.0 ml of 0.10N NaOH for neutrality. How much concetrated HNO3 at 15.8N must be added to one liter to make it exactly 0.25N?
asked by jc