Questions Asked on
June 18, 2014

Chemistry
Determine the concentration of CO32 ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 × 107 and Ka2 = 5.6 × 1011.
asked by Veronica 
physical chemistry
indium(atomic wt.= 114.82 u ) has two naturally occuring isotopes, the predominant one from has isotopic wt. 114.9041 and abundance of 95.72%. which of the following isotopic wt. is the most likely for the other isotope?
asked by veer 
physical chemistry
the atmospheric pressure on mars is 0.61 kPa. what is the pressure in mm of Hg?
asked by veer 
History
When Truman used the phrase "alternate ways of life," what two ways of life was he talking about? This is from my book: "At the present moment in world history nearly every nation must choose between alternative ways of life. The choice is too often not a
asked by Tina 
ENGLISH 111
I need a thesis sentence for online dating and traditional dating for a compare and contrast essay
asked by LANA 
math
remove the irrationality in the denominator (i) 1/1+√2+√3
asked by tanvir 
chemisrty
A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffeecup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL.
asked by jesse 
Physics
1. A rabbit and a turtle are practicing for their big race. The rabbit covers a 30.0 m practice course in 5.00 seconds; the turtle covers the same distance in 120 seconds. If the actual race is run on a 96.0 m course, by how many seconds will the rabbit
asked by Piper 
english
choose from: benign,blase,comprise,condescend,facade,glib,haughty,libel,pseudonym and redundant. Believing he was better than everyone else at the supermarket, Dan was so________(Haughty) that he would rarely ___(benign) to speak to other cashiers. One
asked by Linda 
physical chemistry
on chemical scale, the relative mass of the isotopic mixture of x atoms (x^20,x^21,x^22) is approximately equal to:(x^20 has 99 percent abundance)
asked by veer 
Chemistry
If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58°C to 35.82°C. Calculate the heat capacity of the calorimeter (in J/°C). The specific heat of water is 4.184
asked by Anonymous 
English
Which sentence has an infinitive phrase that functions as the subject? To convert sunlight and energy into food is the end result of photosynthesis. After the rain, water travels from the ground to the roots of a plant. Plants are adapted to take in
asked by happy 
Chemistry
From the following data at 25°C, H2(g) + Cl2(g) → 2HCl(g) ΔH0 = −185 kJ 2H2(g) + O2(g) → 2H2O(g) ΔH0 = −483.7 kJ Calculate ΔH0 at 25°C for the reaction below. 4HCl(g) + O2(g) → 2Cl2(g) + 2H2O(g)
asked by walter 
palo verde high school
what is the value of x if m arc ADC =5(x3)and angle ABC=165
asked by adiba 
physical chemistry
1g of hydrogen contains 6x10^23 atoms. the atomic wt. of helium is 4 u. it follows that the number of atoms in 1g of He is:
asked by veer 
math
an open box is to be formed out of a rectangular piece of cardboard whose length is 8 cm longer than its width to form the box,a square of side 4 cm will be removed from each corner of the cardboard then the edges of the remaining cardboard will be turned
asked by kenneth 
chemistry
In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?
asked by josie 
physics
1. Two similar cylindrical polished bars weighing 5.00 N each lie next to one another in contact. A third similar bar is placed on the other two in the groove between them. Neglecting friction what horizontal force on each other is necessary to keep them
asked by GG Khannam 
physical chemistry
the isotopic abundance of C12 and c14 is 98% and 2% by mass respectively. what would be the no. of atoms of c14 isotope in 12g carbon sample?
asked by veer 
physical chemistry
the atomic wt. of two elements A and B are 40 u and 80 u respectively. if x g of A contains y atoms, how many atoms are present in 2x g of B?
asked by veer 
Math
1. What is the tenth term of the geometric sequence whose first term (a1) is 16 and the common ratio (r) is –½? 2. Given the terms a10 = 3 / 512 and a15 = 3 / 16384 of a geometric sequence, find the exact value of the first term of the sequence.
asked by Jade 
physical chemistry
1 mole of element x has mass, 0.444 times the mass of 1mole of element Y. one average atom of element x has mass 2.96 times the mass of one atom of ^12c. what is the atomic wt. of Y?
asked by veer 
Math
You start your shift as a cashier with your drawer containing ten $1 bills, 5 $2 bills, three $5 bills, one $10 bill and one $100 bill. Find the expectation if one bill is selected.
asked by Shelagh 
chemistry
The decomposition reaction, x>products, is secondorder with rate constant k=0.0183 L/(s)(mol). How long will it take for the decomposition to be 95% complete, if the intitial concentration of X is 1.25mol/L? Thanks
asked by Jin 
chemistry
Using 32.00 g/mole as the molecular mass of oxygen and 28.01 g/mole as the molecular mass of carbon monoxide, solve the above problem. A)79.97 B)61.3 C)61.27 D)80.00
asked by help (: 
Math
At this year's State Fair, there was a dice rolling game. If you rolled two dice and got a sum of 2 or 12, you won $20. If you rolled a 7,you won $5. Any other roll was a loss. It cost $3 to play one game with one roll of the dice. What is the expectation
asked by Shelagh 
Chemistry
What type of reaction is photosynthesis, the process where carbon dioxide combines with water to form glucose in the presence of sunlight?
asked by josie 
finite math
Among 3843 year old, 25% say they have written an editorial letter while under the influence of peer pressure. Suppose two 3843 year old are selected at random. (a )what is the probability that at least one has not written under the influence of peer
asked by carol 
finite math
The probability that a 3year old garter snake will reach 4 years old is 0.62719. (a) what is the probability that two randomly selected will reach 4 years old? What is the probability that five randomly selected 3 year old garter snakes will reach 4 years
asked by carol 
algebra
If John stands near a 30 foot tall tree and leans a 50 foot tall ladder against the tree that reaches to the top of tree, then how far is John standing away from the tree? (Round to the nearest hundredth)
asked by Anonymous 
physics
A rifle bullet with a mass of 16.5 g traveling toward the right at 285 m/s strikes a large bag of sand and penetrates it to a depth of 22.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
asked by Sara 
finite math
A probability experiment was conducted in which the sample space of the experiment is S={1,2,3,4,5,6,7,8,9,10,11,12}, event F= {6,7,}, and event G={9,10,11,12}. Assume that each outcome is equally likely. List the outcomes of F and G?. find P(F or G) by
asked by carol 
algebra
The sum of six times a number and 1 is equal to five times the number
asked by janie 
physical chemistry
a sample of ammonium phosphate (NH4)3PO4 contains 3.18 mole of H atoms. number of mole of o atoms in the sample is:
asked by veer 
economics
the south african government is not providing welfare or sudsidies to the poor and underpriviledged
asked by nonjabulo 
Physics
Determine the electric force of a 8.0uc charge would experience when placed 14cm to the left of a 5.0uc charge. got 18N, but I'm not sure if I add the negative to the answer
asked by James 
Maths literacy,history,life science,english,xhosa,life orantation,geography.
I'am doing grade 11 now and when i passed grd 12 next year.i want to know what caree is good for my subjects ,because i don't know what caree should i take.
asked by Avumile 
Math
How much will it cost to carpet a room that's 12ft by 15ft if the carpet cost $25 per square yard
asked by Anonymous 
chemistry
what is the molarity of a solution prepared by dissolving 1.25g of hcl in water to make 30 centimeter cube of solution
asked by hifsa 
chemistry
Why is respiration an exothermic reaction?
asked by josie 
physics
an electric hot water heater takes in cold water at 13.0 degrees celsius and delivers hot water. the hot water has a constant temperature of 45 degrees celsius when the "hot" faucet is left open all the times, and the volume flow rate is 5.0 x 10 ^6
asked by Anonymous 
Physics
The sun is a satellite of Milky Way's galactic central cluster. The sun revolves around this center with a radius of 2.28x10^20 m. and with a period of 2.52x10^8 years. If the universe is 16 billion years old. a) How many times has the galaxy rotated and
asked by Tyco 
physical chemistry
which one of the following pairs of gases contains the same no. of molecules:
asked by veer 
chemistry
) Calculate the amount of unreacted aqueous ethanoic acid (CH3COOH(aq)) in the sample taken for titration with aqueous potassium hydroxide(KOH(aq)). Clearly show the steps in your calculation. (1 mark) (v) Hence calculate the amount of aqueous ethanoic
asked by jsame 
chemistry
A gas occupies 210 mL at 73°C. To have the same gas occupy 360 mL: Should the temperature be increased or decreased? What is the new temperature? A)120 K B)0.0029 K C)340 K
asked by ginger 
Chemistry
What is the mass of a proton? Is it 1g, 1amu, or something else?
asked by Cici 
math
a boy travels in a boat at an angle of 20 degrees to the river bank.if he travels 200m before reaching the opposite bank,calculate the width of the river
asked by mbongeni 
Chemistry
If a latex balloon had a volume of 7.00 L at 39 °C, what would be the volume of this balloon at 21 °C?
asked by Tamisha 
ALGERBRA
A STATE LOTTERY IS DESIGNED SO THAT A PLAYER CHOOSES FIVE NUMBERS FROM 1 TO 30 ON ONE LOTTERY TICKET. WHAT IS THE PROBABILITY THAT A PLAYER WITH ONE TICKET WILL WIN? WHAT IS THE PROBABILITY OF WINNING IF 100 DIFFERENT TICKETS ARE PURCHASED?
asked by JOHN 
Physics
a boat leaves shore and travels 30km east and then 15km 50 degree South of east Find the resultant the boats resultant displacement?
asked by Earl 
Physics
Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much
asked by Angel Mercado 
chemistry
A reaction has a first order rate constant of (6.25x10^5 1/s) at T=298.15K and (0.0000538 1/s) at T=338.15K. What is the value of the rate constant at T=316.15K?
asked by Jin 
chemistry
The activation energy, Ea, for a zerothorder reaction, X>products, is most readily obtained from the slope of a plot of: (choose from below) [X] vs time ln k vs time rate vs time [X]^2 vs time ln[X] vs time 1/[X] vs time ln k vs 1/T, where T is
asked by Jin 
math
At the faculty costume party , each teacher from Transylvania Middle school came dressed as his of her favorite creepy creature . The teachers arrived one at a time , and when a new teacher came in , each of the teachers already there lined up at the door
asked by Jessica 
math
How to solve first question using a t table please help answer question really stuck on wok new answers 19 or170 can you tell me which is right showing work please thank you whole lot  jessica ledesma
asked by Jessica 
science
Imagine that you have a rectangular swimming pool, but you have no idea how deep it is. You know that the pool has a volume of 216 m3 . You measured the dimensions of the pool and found that it is 15 m long and 6 m wide
asked by shameek 
math
I am a decimal between 2 and 3. The digit in my thousandths place is the sum of the digits in my tenths and hundredths place. The digit in my tenths place is the difference of the digits in my thousandths and hundredths place. The digit in my hundreths
asked by jude 
math
The number of students who attended the class from monday to saturday were consecutive integers the average number of students attending class from monday to wednesday is 34. find average number of students attending class from thursday to saturday
asked by Navami 
health
Mary Happens is an 82yearold Hispanic patient who has been admitted to the hospital. She has Medicare and Medicaid. What demographic factors should be considered in providing this patient health care? What is the effect of culture on prevention and use
asked by shay 
algibra
Write an equation in the form y = mx + b for the line which passes through (1, 10) and (7, 2).
asked by calgy 
healthcare
Many Americans hospitals have wound up employing family practice physicians or establishing contract management arrangements for their practices. Most hospitals that employ doctors have found that they are losing money on office operations. In essence, the
asked by trelle 
english
It's me again :) and again I need help with a mail to my prof... Dear Ms. ... ... and I thought about our presentation. Our topic is compound adjectives. Shall we only talk about compound adjectives or shall we also talk about Adverbs, Participles, how to
asked by Cindy 
algebra
the quotient of g and 9
asked by Anonymous 
math
okay so I have to work out this problem for school work and I don't understand it. the problem is : if the perimeter of an isosceles triangle is 2x + 10, what is the length of one of the congruent sides ? PLEASE HELP ME !
asked by kayla 
Physics
A person of mass 83.8 kg escapes from a burn ing building by jumping from a window situ ated 25 m above a catching net. The acceleration of gravity is 9.8 m/s2 . If air resistance exerts a force of 109.1 N on him as he falls, determine his speed just
asked by Kirbi 
finite math
A baseball player hit 59 homeruns in a season. Of the runs, 22 went to right field, 15 went to right center field, 8 went to center field, 8 went to left center field and 6 went to left field. What is the probability that a randomly selected home run went
asked by carol 
Math
While cleaning her dorm room, Monica mistakenly pushed three coins off the desk. When they land on the chair below, find the odds (a) in favor of getting exactly three heads (b) in favor of getting exactly three tails (c) against getting exactly two heads
asked by Shelagh 
math
A group of friends consist of 3 girls and 5 boys. If that group of friends is separated into a group containing 1 girl and 2 boys, how many combinations of the original 8 friends could be made into the smaller group?
asked by y. 
Math
A 15 ft ladder is leaning against the wall. The top of the ladder reaches 10ft up the wall. What is the angle that the ladder makes with the ground?
asked by John tuckernam 
marketing
What challenges do specialized magazines such as Mother Earth News face hen trying to entice advertisers?
asked by Nikki 
Math
Four coins fall onto the floor. Find the probability that (a) exactly three coins land heads up (b) all coins land tails up (c) two or more coins land heads up (d) no more than two coins land tails up (e) at least one coin lands tails up
asked by Shelagh 
physics
a body of mass 40kg walk to a step in 40. find the kinetic energy
asked by godwin 
Finance
Carry Trade Strategy)In Jan 2003, the interest rate on Japanese Yen was 0.5% and on Australia dollar was 6%. The spot rate was S(¥/AU$)=69.28. Tom Bohn, a hedge fund trader specializing in FX trading in Blackrock Inc, started a carry trade between Yen and
asked by Financehelp 
Finance
1. (Covered Interest Arbitrage) Harry Norman, a foreign exchange trader at UBS’s office in Tokyo has $2,000,000 or its yen equivalent to invest. He faces the following exchange rates and interest rates. Show how can he profit from the covered interest
asked by Summer14 
Finance
1. (Covered Interest Arbitrage) Harry Norman, a foreign exchange trader at UBS’s office in Tokyo has $2,000,000 or its yen equivalent to invest. He faces the following exchange rates and interest rates. Show how can he profit from the covered interest
asked by Anonymous 
math please help
Limit as x approaches zero of (sinx(x^3/6)/x^5)
asked by claire 
Finance
1. (Covered Interest Arbitrage) Harry Norman, a foreign exchange trader at UBS’s office in Tokyo has $2,000,000 or its yen equivalent to invest. He faces the following exchange rates and interest rates. Show how can he profit from the covered interest
asked by Anonymous 
Astronomy
True or False? Galaxies are distributed randomly and approximately uniformly in space.
asked by querty 
Astronomy
True or False? The first galaxies formed in the regions where dark matter density was highest.
asked by querty 
Math
Given: ________, – 243, – 226, – 209, – 192, – 175, … The 67th term of the sequence is __________. The series of the first 27 terms of the sequence is __________.
asked by Jade 
Math
Victor bought a brand new car for P750,000. If the value of the car depreciates 20%per year, what will it be worth during the fourth year?
asked by Piper 
Physics
1. A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and (b) the average speed. 2. A boy kicked a can horizontally from a 6.5 m high rock with a speed of
asked by Piper 
algebra
1. A professor has RM 15000 to invest for one year, some are 8% and the rest are at 7% annual interest. If she will earn RM 1100 from these investments, how much did she invest at each rate? (4 marks)
asked by evian 
Physics
Consider a car starting at rest at the beginning of a 250 m street. At time t = 2.0 s it is 20 m along the street. At time t = 4.0 s it is 80 m along the street. Find its average velocity in the: (a) First 2.0 s (b) First 4.0 s (c) Last 2.0 s My work: I
asked by Long 
chemistry
According to the mechanism below, what is the correct expression for the rate consumption of A? In the mechanism, M is a molecule that collides with A and A* is a highlyenergized for of A. Step 1: A+M A*+M : rate constants k1 and k1 Step 2: A* C : rate
asked by Jin 
physics
If the change in the value of 'g ' at a height 'h ' above the surface of earth is the same as at a depth 'x ' below it. When both x and h are much smaller than the radius of the earth. The relation between x and h is?
asked by fatima 
math
8x12x0x3=
asked by cielo 
math
12x0x3x1
asked by cielo 
Math
state whether each relation y=f(x) describes a quadratic function or not
asked by Jeff 
Math
state whether each relation y=f(x) describes a quadratic function or not y=3x^2
asked by Jeff 
physical chemistry
the approximate no. of molecules of co2 present in 44g of co2 is:
asked by veer 
physical chemistry
if the atomic mass of sodium is 23u the no. of moles in 46g of sodium is:
asked by veer 
physical chemistry
the no. of atoms in 558.5g of Fe (at wt = 55.85u) is:
asked by veer 
geography,maths literacy,tourism,electrical techn
What job can I do with these subjects?
asked by Vera 
math
In a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says there are 130 glasses in all. Is it right? Why?
asked by jr 
math
Write an expression for the problem, then evaluate. Tickets for children in a carnival cost 150. A teacher of a class of 48 pupils gets for the whole class but only 43 pupils buy. Is it right for the teacher to say that she has 6,350 for the tickets of the
asked by jr 
Algebra 1
Please I need help on. Function y=4x +5 with the domain x≤0. And what is the range of the function?
asked by rana 
healthcare
Many Americans hospitals have wound up employing family practice physicians or establishing contract management arrangements for their practices. Most hospitals that employ doctors have found that they are losing money on office operations. In essence, the
asked by trelle 
Math
A number whose digit in the ten billions place is 5 less than 8
asked by Harry 
Biology
Today many different species of tortoise may be found in he Galapagos islands. Using your knowledge of evolution, explain how these many specues arose from one common ancestor?
asked by Maya 
Automotive Engine Types
A 2.2 liter engine would have a displacement of approximately
asked by Kenny