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Questions and answers by visitors named
K
Questions (917)
Jordan and Mike are both planning on attending university in Calgary. Jordan's parents rent him a one bedroom apartment for $750
2 answers
988 views
The mom left the room with a MODICUM of respect after her baby began ____ . a) sleeping b) screaming c) praying d) singing b is
5 answers
846 views
Iron is obtained from iron ore according to the following reaction: Fe2O3+CO---> Fe+CO2 (unbalanced).
a. Assuming the blast
4 answers
1,784 views
A right square pyramid’s base has edges measuring 20 feet each. If
the pyramid’s height is 27 feet, what is its volume, in
4 answers
1,479 views
Tim needs to fill 3 20L barrels with oil. Oil dispenser flows at 100ml/s . How long to fill up 3 barrels.
Please help by showing
5 answers
3,980 views
Invasive Species Quick Check
What aspect of an organism makes it an invasive species? It does harm and is introduced to the
40 answers
1,836 views
Write an inverse variation to model the situation and answer the question. Two rectangular fields have the same area. One
1 answer
89 views
A cylinder with a movable piston contains 2.00g of helium, He, at room temperature. More helium was added to the cylinder and
7 answers
5,096 views
Rhodium has density of 12.41g/cc and crystallizes with the face-centered cubic unit cell.
Calculate the radius of a rhodium atom.
7 answers
2,208 views
oceanography is one of the oldest sciences. false right
4 answers
1,402 views
When x^2-5x+3c is divided by x-3 the remainder is -12. What is the value of c?
3 answers
842 views
A truck has a minimum speed of 14 mph in high gear. When traveling x mph, the truck burns diesel fuel at the rate of
0.0086584(90
4 answers
2,968 views
I need help completing nuclear equations:
a. ? + 59/27Co -> 56/25Mn + 4/2He b. ? -> 14/7N + 0/-1e (I think this one is 14/6C, but
6 answers
1,133 views
You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for
4 answers
231 views
How are artificial selection and genetic modification similar?
1 answer
129 views
Why did humans who migrated farther from the equator develop lighter skin
1 answer
66 views
Compose at least 2 paragraphs that explains your collage and includes any remaining required elements.
TKAMB
3 answers
17 views
The federal criminal pretrial process begins with the first appearance. This appearance is held before a magistrate during which
1 answer
383 views
Are: Ba(NO3)2, Ti)2, MgI2, and Ca(CH3COO)2 soluble or insoluble in H2O @ 25degrees C?
Here is a site that lists the solubility
1 answer
652 views
As your first job as the new manager at the outdated, adversarial company, write a plan for changing its organizational
2 answers
688 views
Imagine you have a meeting with the CEO and other high ranking officers of a company that invests in distance learning
1 answer
532 views
what is NH3 in written form?
ammonia As a note, it is becoming more and more common to see ammonia written in IUPAC form,
1 answer
438 views
Find X
27^4x-2=243^3x+6 Please explain how to do it. Thanks 27^(4x-2)=243^(3x+6) Notice that 27 and 243 are both multiples of 3
2 answers
531 views
Find X
27^4x-2=243^3x=6 Please Explain Thanks Is this a repeat of the problem you posted earlier? If so, it should be
1 answer
461 views
how do I work this question out?:
50.00g of NaCl are dissolved in water to give a solution that contains 2.500% NaCl by mass. The
1 answer
565 views
thank you VERY much for your replies, DrBob.
Another question, however: How many moles of ions -both cations and anions- are
1 answer
635 views
A gaseous hydrocarbon (an organic compound consisting of C & H) weighing 0.232g occupies a volume of 102mL at 23 degrees Celcius
1 answer
514 views
What is the exact method/formula used to calculate oxidation state #'s? & how does one know when to use the correct oxidation
1 answer
564 views
in addition to previous Q:
for eg: why is the oxidation state (#) of Ca in CaH2 "+2"? According to a p.table I have here +2 is
1 answer
588 views
Your manager is concerned and wants to make sure that you learned from this mistake and the likelihood of this happening in the
1 answer
558 views
How do you solve for x in this problems??
bx-2=10 x/2+e=9 5x+e=9 These are rather trivial. I will do one. The second: subtract e
1 answer
399 views
Hi,
I have 4 questions regarding Biology. 1. Does a different chromosome number in two species represent a significant
1 answer
649 views
What changes, if any, to the current condition of these tools would you make at the next meeting of the Federal Reserve? Explain
7 answers
768 views
[1.04] If B is between A and C, AB=2x-1, BC=3x+5 and AC=24, what is the value of x?
Segment A C contains point B.
4 answers
815 views
] A printed capital letter names a:
3 answers
395 views
why do artist use parallel lines that do intersect??
Thank you for using the Jiskha Homework Help Forum. Here is a definition of
1 answer
751 views
What's the difference between the following sentences: "he looks happy." "he looks like he's happy." "he seems happy."
4 answers
482 views
A blood sample contains several different types of cells, each of which contains different combinations of specific ions and
4 answers
1,757 views
two words: aehoumncrrusse
4 answers
288 views
Many home barbeques are fueled with propane gas C3H8.
What mass of carbon dioxide (in kg) is produced upon the complete
3 answers
2,828 views
I am still not quite grasping how to complete this problem:
Posted by K on Sunday, October 14, 2007 at 6:43pm. Many home
5 answers
644 views
For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants.
4Al(s) + 3O2(g) ->
2 answers
923 views
A scientist wants to make a solution of tribasic sodium phosphate,Na3PO4 , for a laboratory experiment. How many grams of Na3PO4
4 answers
1,363 views
Calculate the mass (in grams) of the product formed when 10.1g of the underlined reactant completely reacts. Assume that there
2 answers
537 views
How many molecules of ammonia are produced from: 2.58x10^-4g of Hydrogen?
My balanced equation: 3H2 + N2 = 2NH3 I worked this
4 answers
534 views
My balanced equation is:
a) 2C8H18(g) + 25O2(g) -> 16CO2(g) + 18H2O(g) b) 0.290 mol of octane is allowed to react with 0.670mol
5 answers
8,031 views
Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction:
2Al(s) + 3Cl2(g) -> 2AlCl3(s) You are
4 answers
2,039 views
Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction:
2Al(s) + 3Cl2(g) -> 2AlCl3(s) You are
7 answers
9,732 views
Help on part "c":
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol
9 answers
25,448 views
Help on part "c":
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol
3 answers
927 views
What would be the likely function of a plant cell containing many chloroplasts?
3 answers
839 views
I was just wondering if someone would be able to critique my answers for the following Chem questions? they range from pretty
10 answers
1,061 views
A) a picture shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00atm ,
10 answers
9,909 views
Butane, C4H10, is a component of natural gas that is used as fuel for cigarette lighters. The balanced equation of the complete
4 answers
1,852 views
Where does Bexar County rank among texas counties in per capita income?
<br><br> Where does Cameron County rank among texas
1 answer
427 views
The mass of an electron is 9.11*10^-31kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31*10^-10m, how
4 answers
1,614 views
The electron from a hydrogen atom drops from an excited state into the ground state. When an electron drops into a lower-energy
10 answers
10,072 views
The mass of a golf ball is 45.9g. If it leaves the tee with a speed of 72.0 m/s, what is its corresponding wavelength?
Express
7 answers
13,664 views
I just have a couple of questions that I need some help with:
1) A 0.22-caliber handgun fires a 27g bullet at a velocity of
15 answers
865 views
if you were to draw a Lewis dot structure for HOCl...would it be H:Cl:O: (with double dots above & below the Oxygen & Chlorine)
3 answers
1,150 views
Consider the relation shown for the radius of the species indicated. Which choice presents a valid comparison?
a) Na > Na+ b)
4 answers
1,633 views
Consider the following neutral electron configurations in which 'n' has a constant value. Which configuration would belong to
5 answers
5,086 views
Which of the following elements has the highest first ionization energy?
Element then radius (pm): X = 105pm Y = 175pm Z = 274pm
4 answers
1,397 views
Could someone please tell me if I am correct on the following???:
Pick the larger species from each of the following pairs. Sr or
4 answers
1,569 views
Arrange the following elements in order of decreasing atomic radius:
Cs, Sb, S, Pb, Se *(list from largest to
6 answers
10,610 views
Is there any way that people are able to send charitable monetary donations, of sorts, for all of the help & guidance which they
10 answers
438 views
I just have 2 other questions that I just want to make sure on:
Place the following elements in order of decreasing atomic size:
12 answers
3,181 views
Place the following elements in order of Decreasing atomic size: tellurium, bromine, argon, cesium, strontium, and selenium.
woul
3 answers
1,559 views
I just have one more question regarding electron configurations for the following ions:
Mo^3+ V^3+ I cannot understand why my
7 answers
692 views
Is a natural painting also a representational one?
1 answer
290 views
Which answer best describes an O_3/ozone molecule:
1. Each atom in ozone is connected to another atom by 1.5 bonds. 2.The double
3 answers
1,428 views
I had posted the question to that previous chem question, regarding Mo & V...they said that it should have been correct. What I
2 answers
495 views
For a molecule of fluorous acid, the atoms are arranged as HOFO.
What is the formal charge on each of the atoms? Enter the formal
7 answers
15,648 views
If NO3- has 3 resonance structures, but only one has to be written, where does the extra electron, making there then be 24
1 answer
456 views
What is the hybridization of the central atom in COH2??
Would the correct response, out of the following: a) sp b) sp^2 c) sp^3
5 answers
5,338 views
I kind of need some guidance with "PART C" below:
A) The bond angles in CH4 are 109.5degrees, while the bond angles in NH3 are
2 answers
521 views
kind of need some guidance with "PART C" below:
A) The bond angles in CH4 are 109.5degrees, while the bond angles in NH3 are 107
3 answers
623 views
What are the expected bond angles in ICl4+ (or) ICl_4^+ ??
I think that I have the stucture drawn correcty: I is the central atom
10 answers
14,311 views
Which statement best describes the polarity of SF_4Cl_2?? (or: SF4Cl2, if that helps more)
1. Always polar. 2. Always nonpolar.
10 answers
12,418 views
One other question that I am really not 100% sure on:
how do I draw the electron-dot structure for: CHClO. I "think" that CHClO
7 answers
849 views
You are a researcher for a golf club manufacturer. You are given two identical looking cubes of a metal alloy. You are informed
5 answers
5,111 views
Info:
The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit
2 answers
1,035 views
Initial info:
The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called
5 answers
1,039 views
Do impurities raise or lower the property of an organic compound such as lower or raise an equivalent weight?
3 answers
615 views
I'm struggling with this homework question:
Draw all possible isomers you can for C4H8O2. So far I have three esters and butanoic
1 answer
460 views
Two adjacent corners of a square have charges q1 = +1.5 x 10-9 C and q2 = +4.0 x 10-9 C. The length of a side of the square L =
2 answers
503 views
Detective Homer Fry and jenine Small looked high and low for clues.
Cory drove to middleton in his search for Eloise. Dose one of
5 answers
454 views
I just want to check if I am correct on this Q:
What is the major product formed when 1-butene reacts with water in the presence
2 answers
509 views
I am really not certain on the following question:
Which compounds contain stereocenters?? I) 1-chloropentane II) 2-chloropentane
3 answers
882 views
Which is the major product from acid catalyzed hydration (addition of water) of 2-methyl-2-pentene?
a) 2-methyl-2-pentanol b)
4 answers
2,123 views
How many stereoisomers are there for 1,2-dichlorocyclopentane?:
a) 1 b) 2 c) 3 d) 4 answer: "B" (2)??? or: "D" (4)??? How many
4 answers
1,299 views
What would the equation look like if you added bromine (Br) in the presence of CH2Cl2 (Dichloromethane) to cyclohexanol (C_6H_11
7 answers
2,434 views
Please check these out for me, if I am correct:
Match the following statements with SN1 or SN2 reactions: 1) The order of
2 answers
909 views
Arrange the compounds in the order of increasing boiling point ***(LOWEST first):
1) H3C-O-CH3 2) H2O 3) CH3CH2OH 4) CH3CH2SH I
7 answers
3,824 views
Is there a 'Dr.Russ' that can help with Organic Chem?
7 answers
376 views
Please check these out for me, if I am correct:
Match the following statements with SN1 or SN2 reactions: 1) The order of
3 answers
533 views
Tomorrow I am to write a formal persuasive essay of up to 500 words ONLY, within ONE hr ONLY, as a written portion of an
3 answers
1,080 views
in which sentence dose the subject comes after the verb?
A.On the next street,you'll find the shoe shop. B.Where is my Elvis CD?
4 answers
367 views
Which compound is the weakest base:
a) aniline b) 4/para-bromo aniline c) 4/para-nitroanilinie d) 4/para-methylaniline Would "c"
1 answer
430 views
find the area of a square if each side measures 10 cm. my answer is 100 cm
1 answer
331 views
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