What does % yeild mean in chemistry?
96337
its your actual yeild over your thearedical yeild
988522
If it's a number like .750 or .999 it means the percent of gold.  .999 is the highest number used because there's no way to get all of the impurities out to call it 100%\n\nIf it's a number with a k, that stands for karat weight.  24k is basically 100% gold.  18k is 18/24 so it's equal to 75% gold or .750 (see example above).
447569
Psh. You're a math test.\n\nBut uh... a 2%.  Thank god I did the extra cedit!
827720
Bond polarity refers to difference of electronegativity between two atoms in a bond. \n\nMolecular polarity is the sum of all the forces\n\nThat's all I know.
246626
3^2\n\nThe ^ called carat indicates exponentiation, or "three raised to the power of 2".
505497
HR stands for "high resolution". The differences could be aperture of the electron beam or the "optics" beyond the sample.
1093419
well i think i know what u mean........  ^2- means to the power of 2\nlike....\nHydrogen is 1s^1, helium is 1s^2\n  \nif this is what u mean the like \nSodium:  is [Ne]2s^1   \n\nThe site i put on here i found to be helpful when i started on this in college,.... so check it out is good and easy to understand.
441135
polar means that the electron cloud is not even, and yields a slight negative charge to one side, and postive charge to the other side, it is call a dipo moment.\n\nNon polar means that the electron cloud is evenly balanced and no dipo moment is formed.\n\nNaCl, table salt is polar, and will go into solution with a polar solvent such as water.\n\nMethane, CH4 is non polar and will not go into solution with a polar solvent, but will with a non-polar solvent.\n\nThis is matters alot in chemistry, since electron reactions are the bases for all chemical bonds and reactions.\n\nRead more , and you will understand better, good luck
901225
I don't do homework but I'll tell you how to do it.  I suspect, though, that you mean 0.9% (w/v).  The parenthetical expression means that the 0.9% is in terms of weight to volume.\n\nSo, for every 100 mL of this solution, you have 0.9 g NaCl.  That means that, for every liter, you have 9 g NaCl.  So, you calculate how many moles of NaCl are in 9 g of it.  Then, since you know that's in one liter, that will be your molarity as well.
843645
2% divided by 100% (2% / 100%)\n\nthe % signs cancel out because they are found on both the demoninator and the numerator, so you get:\n\n2 divided by 100 (2 / 100)\n\nwhich equals 0.02, not 2%, not 0.02%
1110000
Since you asked this in 2 categories, I'll answer in 2 categories\n\nNTH\n\nhas no vowels.  \n\nThe words given by others with 'y's have a vowel.  Y is a vowel in those cases.\n\nN is the mathematical symbol for an unspecified number, so nth means “some unspecified number” and by extension “the highest, the utmost.” It is Standard in either sense but occurs most often in the cliché to the nth degree meaning “to the greatest possible degree, to the utmost degree,” as in His musicians were rehearsed to the nth degree of polish. (Note that although the mathematical symbol is italicized, the adjective is not.)
985007
Percent abundance is relative abundance written in percent form.  i.e., If the relative abundance of isotope A is 0.45, then its percent abundance is 45%.\n\nAbundance is the fraction of atoms of a particular isotope in a naturally-occuring sample of an element.\n\ne.g., If you had 100 atoms of carbon, you'd find that it is made up of 2 isotopes: carbon-12 and carbon-13.  The relative abundance of each is 0.99 and 0.01, respectively (or 99% carbon-12 and 1% carbon-13).\n\nThe average atomic mass or weighted average atomic mass or atomic weight (see the slight mutation in terms... in this case, "weight" doesn't refer to force due to gravity, but "weighted average") is the sum of the products of mass number and relative abundance, respectively (whew!).\n\nOr, \n\natomic weight = \n(mass number of isotope A)*(relative abundance of isotope A) \n+ (mass number of isotope B)*(relative abundance of isotope B)\n+ (mass number of isotope C)*(relative abundance of isotope C)\n+ ...\n\nfor an atom with isotopes A, B, C, ...\n\nFor carbon, we can check my earlier numbers (which stomp all over significant figures and play fast and easy with mass numbers in amu's...)\n\nAtomic Weight = (12)*(0.99) + (13)*(0.01)\n= 12.01\n\nChecking the periodic table, we see that carbon's atomic weight is 12.01 amu.\n\nIf you haven't lost all interest altogether, there's an analogy to how you calculate your grade point average.  Each letter grade is a different isotope (A = 4, B = 3, etc.).  You calculate your GPA by determining the abundance of each grade and multiplying it by its weight.  Straight A's is a simple case (it always helps to be optimistic -- straight F's is an equally simple, if not depressing case): 100% A's or 1.0 relative abundance multiplied by 4 or GPA = 4.0.  But wait, you might cry... that's not how you, err, your buddy, calculates GPA.  He counts up his A's, multiplies by 4 and then divides by the number of grades (courses).  Mathwise, we can do the first and last steps out of order (since this is multiplication and division, and therefore order doesn't matter), and ... we get abundance (part/whole) again.\n\nLast digression --- in college, not all classes are equal, therefore not all grades are equal.  It's again a weighted average situation.  Let's say you get an A in Band (1 credit) and a C in Chemistry (4 credits) for a total of 5 credits.  Your GPA is then (1*4 + 4*2)/5 = 2.4.  Your buddy can barely carry a tune in a bucket, but is a chem whiz, so he gets a C in Band and an A in chemistry.  HIS GPA is (1*2 + 4*4)/5 = 3.6.  A surface reading of the situation would say "hey, this isn't fair... you both got 1 A and 1 C."  But, since colleges in their wisdom have decreed that Chemistry is 4 times harder than Band, note that 1/5 or 20% of your credits come from Band while 80% (4/5) come from Chemistry.\n\nHope that helps more than your standard wikipedia answer...
834556
the percent yield of 91.34% means: in theory, if you calculate that you will have 100 after the reaction. However, in practical, you just have 91.34\nNow, we solve your problem\n\n4NH3 + 5O2 --> 4NO + 6H2O\n\nit is a balanced equation\n\nI call the moles of O2 as n(02), the moles of NO as n(NO)\n\nn(O2) = 64/32= 2\n\n=> n(NO)= 4/5 n(O2)= 1.6\n\n=> the weight of NO in theory is 1.6*30= 48\n\n=> the weight of NO in practical is 48* 91.34%= 43.8432
848062
what does molarity mean LMAO lol
182906
pH is negative log of the concentration of hydrgen ions.\n\nSo pH of 1 would mean 10^(-1) or 0.1 concentration of hydrogen ion.\n\npH of 14 would mean 10^(-14) or 0.00000000000001 concentration of hydrogen ions.\n\nThat would mean that with a no. between 1 and 14 we can express a very wide range of concentrations.
769075
Percentages refer to fractions of a whole; that is, whatever you're looking at, the percentage is how much of the whole thing you have. For instance, "50%" means " 1/2 "; "25%" means " 1/4 "; "40%" means " 2/5 "; et cetera.\n\nOften you will need to figure out what percentage of something another thing is. For instance, if a class has 26 students, and 14 are female, what percentage of the students are female?  It is 14 out of 26, or 14/26 = 0.538461538462..., or about 54%. (For more information on percent word problems, look at the Percent of lesson.)\n\n"Percent" is actually "per cent", meaning "out of a hundred". (I think it's Latin.) You can use this fact, along with the fact that fractions mean division, to convert between fractions, percents, and decimals.\n\nPercent to Decimal\n\nPercent-to-decimal conversions are easy; you mostly just move the decimal point two places. The way I keep it straight is to remember that 50%, or one-half, of a dollar is $0.50. In other words, you have to move the decimal point two places to the left when you convert from a percent (50%) to a decimal (0.50). Some more examples are:\n\n      27% = 0.27\n      104% = 1.04\n      0.5% = 0.005\n\nPercent to Fraction\n\nPercent-to-fraction conversions aren't too bad. This is where you use the fact that "percent" means "out of a hundred". Convert the percent to a decimal, and then to a fraction. For instance:\nread more here --> http://www.purplemath.com/modules/percents.htm
216431
Probably means 2% hydrogen peroxide, or 2 parts hydrogen peroxide to 100 parts water. 100% would be very explosive and dangerous. Most companies at the strongest only sell 3%. (The rest is water)