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patrick
Questions (109)
i realy need help on the time travel unit test in music
11 answers
667 views
Determine the missing value, x, of the rectangular pyramid below if the volume is 280 cubic centimeters.
3 answers
443 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
2 answers
271 views
it is a collaborative website in which a user or anyone using this websites can participate or work jointly with a creator or
0 answers
286 views
During a group discussion about the book Holes, Charlie voices the opinion that, "Stanley’s bad luck is the reason he ends up
0 answers
426 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 answer
416 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 answer
1,377 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 answer
1,243 views
what is the complement of the following 29 71 90 2/3 right angle
1 answer
454 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 answer
485 views
What equation is formed when HCl is titrated against Na2CO3 using methyl orange as indicator
1 answer
707 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 answer
1,234 views
from point on horizontal ground a surveyor measures the angle of elevation of the top of a flagpole as18 degrees 40feets he
2 answers
2,200 views
I need help getting the net ionic equations for the equilibrium of sodium cyanide and water and calcium nitrate and water
1 answer
1,203 views
can you please show me how to graph 6y+5x=-18
I know the x-intercept is (-18/5,0) and the y-intercept is (0,-3)
2 answers
378 views
In the figure, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 =
0 answers
875 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 answer
1,551 views
home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ...
Question A
1 answer
1,172 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 answer
924 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 answer
721 views
Whenever organic matter is decomposed under oxygen free conditions, methane is one of the products. Thus enormous deposits of
2 answers
1,668 views
Care must be taken when diluting sulfuric acid with water, because the dilution process is highly exothermic:
H2SO4(l) "arrow"
1 answer
1,526 views
Care must be taken when diluting sulfuric acid with water, because the dilution process is highly exothermic:
H2SO4(l) "arrow"
0 answers
1,158 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
2 answers
2,027 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 answer
601 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
0 answers
537 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
2 answers
656 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
1 answer
869 views
is that a -56? Dr. BOb. thank you
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5
1 answer
489 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
1 answer
983 views
Sucrose (C12H22O11, table sugar) is oxidized in the body by O2 via a complex set of reactions that ultimately produces CO2 (g)
0 answers
2,177 views
is that a -56? Dr. BOb. thank you
When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5
0 answers
451 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
2 answers
523 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
2 H2O2(l) 2
2 answers
4,710 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 answer
468 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
2 H2O2(l) 2
0 answers
666 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
0 answers
465 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 answer
913 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
0 answers
647 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
2 H2O2(l) 2
0 answers
701 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
0 answers
523 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
0 answers
597 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
2 H2O2(l) 2
0 answers
640 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
0 answers
512 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
0 answers
620 views
Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition.
2 H2O2(l) 2
0 answers
685 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
0 answers
595 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
0 answers
511 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 answer
860 views
Am I correct?
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars
1 answer
12,023 views
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars everyday.
0 answers
940 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 answer
413 views
Consider the following balanced thermochemical equation for a reaction sometimes used for
H2S production: 1/8 S8 (s) + H2 (g)
1 answer
5,637 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 answer
2,533 views
What is the (H3O+) and
the 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?
2 answers
1,238 views
correction what is
: 1 x 10^-14 / 2.54 x 10^-3 the x's are (times) not variables thank you.
2 answers
451 views
what is 1 x 10-14 / 2.54 x 10 -3
the x's are times not variables. I need the answer in scientific notation
1 answer
427 views
The weak acid HQ has pKa of 4.89. Calculate the (OH-) of 0.500 M HQ
This is what I have: pKa = 4.89 so Ka = 10^-4.89 = 1.29x10^-5
1 answer
918 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 answer
5,729 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 answer
766 views
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous
1 answer
2,583 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
2 answers
3,819 views
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous
0 answers
842 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
0 answers
694 views
1)Balance the following gas-phase reaction and 2) write its reaction quotient, Qc:
CH4(g)+F2(g)......>>.....<<.......
1 answer
1,593 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 answer
558 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 answer
2,964 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 answer
754 views
. Three charges are positioned as indicated in the figure. Calculate net force
exerted on the +15 µC charge by the +11 µC and
1 answer
1,185 views
Calculate the coefficient of kinetic friction for tyre rubber on the road surface.
0 answers
538 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
0 answers
777 views
write 1.5 billion as a standard numeral
1 answer
675 views
how much heat is needed to raise the temperature of 5kg of silver from 20 degrees C to 96 decgrees C?
1 answer
1,419 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 answer
636 views
When pulled a 30 m piece of string streches 180cm.find percentage increasing length
1 answer
337 views
How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -1
1 answer
597 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?
0 answers
469 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 answer
506 views
A chemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements. The results
2 answers
1,665 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 answer
744 views
find the reference angle of -20000 and express the six trigonometric functions of -20000 in terms of the six trigonometric
1 answer
464 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 answer
469 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 answer
452 views
are my feet are killing me is a alliteration, personification , or hyperbole?
12 answers
6,096 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 answer
364 views
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your
1 answer
543 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
0 answers
428 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
0 answers
482 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 answer
615 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 answer
954 views
What were greenbacks?
2 answers
352 views
For the process
CH4(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
0 answers
680 views
Find the derivative of y=t^2(5t-8)^4.
0 answers
322 views
Calculate the lower quartile (QL) in the following data set: (8, 6, 13, 8, 3, 15, 12, 5).
1 answer
412 views
all of the following are true of gestalt therapy except
2 answers
1,018 views
java,
write a program that prints out the letter X composed of asterisks (*) reply soon
1 answer
872 views
im confused about ionic substances. can someone give me a example of ionic substances?
0 answers
441 views
can someone explain a diatomic molecule, monatomic gas and what would happen if a metal atom bond with a nonmetal atom?
1 answer
472 views
do you know any websites that have any primary sources dealing with the roman empire, such as religion, war and conflict,
3 answers
493 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
3 answers
545 views
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