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Questions (109)

i realy need help on the time travel unit test in music
1. 11 answers
2. 637 views
Determine the missing value, x, of the rectangular pyramid below if the volume is 280 cubic centimeters.
1. 3 answers
2. 419 views
Mr. Smith bought 0.75 pound of sliced turkey for $3.45 and 1.5 pounds of sliced ham for $6.60.How much would Mr. Smith pay for a
1. 2 answers
2. 260 views
it is a collaborative website in which a user or anyone using this websites can participate or work jointly with a creator or
1. 0 answers
2. 267 views
During a group discussion about the book Holes, Charlie voices the opinion that, "Stanley’s bad luck is the reason he ends up
1. 0 answers
2. 406 views
if the 2nd and 5th term of a G.P is -6 and 48 respectively. find the sum of the first fourth term
1. 1 answer
2. 401 views
Sofia invested $360 in an account in the year 2005, and the value has been growing exponentially at a constant rate. The value
1. 1 answer
2. 1,356 views
Meg's pension plan is an annuity with a guaranteed return of 3% per year (compounded quarterly). She would like to retire with a
1. 1 answer
2. 1,212 views
what is the complement of the following 29 71 90 2/3 right angle
1. 1 answer
2. 440 views
solve this physics problem for me a vehicle has a mass of 1200kg and four wheels of area 0.06m2 calculate pressure on one wheel
1. 1 answer
2. 449 views
What equation is formed when HCl is titrated against Na2CO3 using methyl orange as indicator
1. 1 answer
2. 688 views
A population of N = 10 scores has a mean of μ = 24. If one person with a score of X = 42 is removed from the population, what
1. 1 answer
2. 1,214 views
from point on horizontal ground a surveyor measures the angle of elevation of the top of a flagpole as18 degrees 40feets he
1. 2 answers
2. 2,167 views
I need help getting the net ionic equations for the equilibrium of sodium cyanide and water and calcium nitrate and water
1. 1 answer
2. 1,188 views
can you please show me how to graph 6y+5x=-18I know the x-intercept is (-18/5,0) and the y-intercept is (0,-3)
1. 2 answers
2. 340 views
In the figure, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 =
1. 0 answers
2. 844 views
the base of an isosceles triangle is half as long as side of a square.Each of the legs of triangle is twice as long as a side of
1. 1 answer
2. 1,514 views
home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ...Question A
1. 1 answer
2. 1,141 views
When 1 mol of NO(g) forms from its elements, 90.29 kJ of heat is absorbed, How much heat is involved when 4.29 g of NO
1. 1 answer
2. 900 views
When 24.30mL of .5 M H2SO4 is added to 24.30 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 1 answer
2. 699 views
Whenever organic matter is decomposed under oxygen free conditions, methane is one of the products. Thus enormous deposits of
1. 2 answers
2. 1,644 views
Care must be taken when diluting sulfuric acid with water, because the dilution process is highly exothermic:H2SO4(l) "arrow"
1. 1 answer
2. 1,494 views
Care must be taken when diluting sulfuric acid with water, because the dilution process is highly exothermic:H2SO4(l) "arrow"
1. 0 answers
2. 1,121 views
I don't know why it was marked wrong. This is what it said: Where is the 5.64 coming from? Is this a typo?(thank you)HINT To
1. 2 answers
2. 2,010 views
I don't know why it was marked wrong. This is what it said: Where is the 5.64 coming from? (thank you)HINT To balance the
1. 1 answer
2. 577 views
I don't know why it was marked wrong. This is what it said: Where is the 5.64 coming from? (thank you)HINT To balance the
1. 0 answers
2. 518 views
Hi Dr. Bob, I first want to tank you for all your help. Secondly, I don't understand why this was marked wrong.When 27.20mL of
1. 2 answers
2. 636 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
1. 1 answer
2. 837 views
is that a -56? Dr. BOb. thank youWhen 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5
1. 1 answer
2. 466 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
1. 1 answer
2. 954 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
1. 0 answers
2. 2,145 views
is that a -56? Dr. BOb. thank youWhen 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5
1. 0 answers
2. 437 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 2 answers
2. 505 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.2 H2O2(l) 2
1. 2 answers
2. 4,675 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 1 answer
2. 453 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.2 H2O2(l) 2
1. 0 answers
2. 630 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 0 answers
2. 444 views
Am I correct?From data below, calculate the total heat (J) needed to convert 0.539 mol gaseous ethanol at 300°C and 1 atm to
1. 1 answer
2. 882 views
From data below, calculate the total heat (J) needed to convert 0.539 mol gaseous ethanol at 300°C and 1 atm to liquid ethanol
1. 0 answers
2. 617 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.2 H2O2(l) 2
1. 0 answers
2. 677 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 0 answers
2. 505 views
From data below, calculate the total heat (J) needed to convert 0.539 mol gaseous ethanol at 300°C and 1 atm to liquid ethanol
1. 0 answers
2. 567 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.2 H2O2(l) 2
1. 0 answers
2. 608 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 0 answers
2. 493 views
From data below, calculate the total heat (J) needed to convert 0.539 mol gaseous ethanol at 300°C and 1 atm to liquid ethanol
1. 0 answers
2. 596 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.2 H2O2(l) 2
1. 0 answers
2. 646 views
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17
1. 0 answers
2. 579 views
From data below, calculate the total heat (J) needed to convert 0.539 mol gaseous ethanol at 300°C and 1 atm to liquid ethanol
1. 0 answers
2. 476 views
What is the change in internal energy (in J) of a system that absorbs 0.246 kJ of heat from its surroundings and has 0.771 kcal
1. 1 answer
2. 833 views
Am I correct?Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars
1. 1 answer
2. 11,989 views
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars everyday.
1. 0 answers
2. 917 views
Dr. Bob.. 630.24 kj was marked wrong...it said hint: make sure to carry out dimensional analysis........ ÄH value refers to the
1. 1 answer
2. 385 views
Consider the following balanced thermochemical equation for a reaction sometimes used forH2S production: 1/8 S8 (s) + H2 (g)
1. 1 answer
2. 5,603 views
A 49.3 g sample of ethylene glycol, a car radiator coolant, loses 624. J of heat. What was the initial temperature of ethylene
1. 1 answer
2. 2,501 views
What is the (H3O+) andthe ph of a buffer that consists of 0.25M HNO2 and 0.69M KNO2? (Ka of HNO2 = 7.1 x 10^-4) is this right?
1. 2 answers
2. 1,211 views
correction what is: 1 x 10^-14 / 2.54 x 10^-3 the x's are (times) not variables thank you.
1. 2 answers
2. 427 views
what is 1 x 10-14 / 2.54 x 10 -3the x's are times not variables. I need the answer in scientific notation
1. 1 answer
2. 406 views
The weak acid HQ has pKa of 4.89. Calculate the (OH-) of 0.500 M HQThis is what I have: pKa = 4.89 so Ka = 10^-4.89 = 1.29x10^-5
1. 1 answer
2. 894 views
The weak acid HQ has pKa of 4.89.1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH-) of 0.500 M HQ ....Am I correct? a)
1. 1 answer
2. 5,695 views
The weak acid HQ has pKa of 4.89.1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH-) of 0.500 M HQ ....Am I correct? a)
1. 1 answer
2. 737 views
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous
1. 1 answer
2. 2,559 views
How many moles of H3O+ or OH-must you add per liter of HA solution to adjust its pH from 9.75 to 9.01? Assume a negligible
1. 2 answers
2. 3,791 views
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous
1. 0 answers
2. 809 views
How many moles of H3O+ or OH-must you add per liter of HA solution to adjust its pH from 9.75 to 9.01? Assume a negligible
1. 0 answers
2. 671 views
1)Balance the following gas-phase reaction and 2) write its reaction quotient, Qc:CH4(g)+F2(g)......>>.....<<.......
1. 1 answer
2. 1,566 views
Allison and Fred both work at the mall., but Allsion make $2 more than Fred. They work equal hours. Let x represent Allison
1. 1 answer
2. 533 views
Assume water boils at 100.0 C in Houston(near sea level) and at 90.0 C in Cripple Creek Colorado(near 9, 500 feet). If it takes
1. 1 answer
2. 2,944 views
Assume water boils at 100.0 C in Houston(near sea level) and at 90.0 C in Cripple Creek Colorado(near 9, 500 feet). If it takes
1. 1 answer
2. 735 views
. Three charges are positioned as indicated in the figure. Calculate net forceexerted on the +15 µC charge by the +11 µC and
1. 1 answer
2. 1,160 views
Calculate the coefficient of kinetic friction for tyre rubber on the road surface.
1. 0 answers
2. 504 views
Two horizontal forces Upper F1 Baseline and F2 act on a 3.6 kg disk that slides over frictionless ice, on which an xy coordinate
1. 0 answers
2. 757 views
write 1.5 billion as a standard numeral
1. 1 answer
2. 659 views
how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?
1. 1 answer
2. 1,390 views
A 47kg sample of water absorbs 3.40×10^2kJ of heat.Part A If the water was initially at 21.5∘C, what is its final
1. 1 answer
2. 591 views
When pulled a 30 m piece of string streches 180cm.find percentage increasing length
1. 1 answer
2. 307 views
How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -1
1. 1 answer
2. 569 views
A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?
1. 0 answers
2. 434 views
A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?
1. 1 answer
2. 478 views
A chemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements. The results
1. 2 answers
2. 1,636 views
(a) sketch an angle A in standard position whose terminal ray passses through the point (1,-4)(b) Find the exact value of the
1. 1 answer
2. 706 views
find the reference angle of -20000 and express the six trigonometric functions of -20000 in terms of the six trigonometric
1. 1 answer
2. 439 views
my question is find all angles of theta and 2pi whose reference angle is alpha = pi/12. Give exact answers. i cannot for the
1. 1 answer
2. 447 views
find the area of a rectangle bounded by the axes and one of its corner is a point in the curve y=1/x.
1. 1 answer
2. 425 views
are my feet are killing me is a alliteration, personification , or hyperbole?
1. 12 answers
2. 6,074 views
mathematical expression of:1.) 75-5 2.) 14x(3+4) 3.) 3x(11+6) 4.) 1+(6+8) 5.) 20+5-80 6.) 4x2+5
1. 1 answer
2. 338 views
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your
1. 1 answer
2. 509 views
what is the equation of calculating 5/90 lottery winning numbers if these numbers were selected for the first week 24-13-6-60-70
1. 0 answers
2. 409 views
the region in the first quadrant bound by the graphs y=(x*x*x)/3 and y=2x is revolved about the y-axis. find the volume of the
1. 0 answers
2. 464 views
determine the co-ordinate of the poin of intersection of the curves y=x*x and y*y=8x. sketch the two curves and find the area
1. 1 answer
2. 587 views
What does this quote mean?“Why should the Indian be expected to plant corn, fence lands, build houses, or do anything but get
1. 1 answer
2. 926 views
What were greenbacks?
1. 2 answers
2. 337 views
For the processCH4(g) = C(s) + 2H2(g) A reaction is started in a rigid vessel at 1000 K with 1 mole of methane and 1 mole of
1. 0 answers
2. 648 views
Find the derivative of y=t^2(5t-8)^4.
1. 0 answers
2. 308 views
Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).
1. 1 answer
2. 393 views
all of the following are true of gestalt therapy except
1. 2 answers
2. 991 views
java,write a program that prints out the letter X composed of asterisks (*) reply soon
1. 1 answer
2. 850 views
im confused about ionic substances. can someone give me a example of ionic substances?
1. 0 answers
2. 423 views
can someone explain a diatomic molecule, monatomic gas and what would happen if a metal atom bond with a nonmetal atom?
1. 1 answer
2. 439 views
do you know any websites that have any primary sources dealing with the roman empire, such as religion, war and conflict,
1. 3 answers
2. 471 views
ok my teacher just assigned me this wikid stupid worksheet with a riddle whom do you see at the bank if you need to borrow
1. 3 answers
2. 523 views

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