moles

1 ppm = 1 mg / L 375 ppm = 375 mg / L 250 mL = 0.250 L 375 x 0.250 =93.75 mg = 0.09375 g Moles = 0.09375 g / 107.8682 g/mol = 0.000869

Only the absorbance is known (as wel as l)If molar extinction coefficient is unknown, can concentration still be found in grams rather than moles..

a. 41.1 L b. 13.6 L c. 64.6 L d. 9.99 L e. 0.0304 L f. 169 L And how would you figure the problem out.How much volume would 51.5 kg of ethyl alco..

here mass of sodium (m) = 1.576 g we can use the formula, no of moles(n)= mass(m) / molar mass(M) ( You could find the value of molar mass from t..

The limiting reagent is always the substance with the lowest number of moles. The mass is NOT used to determine the limiting reagent. To understa..

Im so lost. Please explain the steps that you did. And, of course, the answer. lol. Thank you!Calculate the mass in grams of 2.3456 mol of lead. ..

Mass is basically weight. Moles are a factor of the number of molecules. The difference in the number of moles between two comes from the differe..

Then Answer this 2. Calculate the number of molecules. Answer in units of molec. Please no websites just an answer1. For 534 g of butadiene (C.4 ..

What do you do if they become irritated? Can you freeze them yourself?Is there any do it yourself way to get rid of those irritating brown moles ..

Zn (s) + 2 HCl (aq) --- H2 (g) + ZnCl2 (aq). Thanks.If 1.0g Zn is dropped in a solution of concentrated HCl, how many moles of hydrogen gas is pr..

Molar mass C20H42 = 282.556 g/mol Mass = 282.556 g/mol x 4.52 x 10^-3 mol = 1.28 g

v=concentartion multiplied by mole so 3.0*1.5=4.5 i hope you are ok!What volume of a 1.5M KOH soltion is needed to provide 3.0 moles of KOH?hi ma..

HNO3 to a buffer made by combining 0.500 L of 0.420 M HC3H5O2 ( Ka = 1.30 x 10-5 ) and 0.500 L of 0.420 M NaC3H5O2Calculate the pH of the solut..

n in varying amounts of hydrated sodium carbonate??What could an extension inestigation be for having just worked out the no. of moles of water o..

The molar mass tells you how many grams of a substance are in one mole. So for example, if you had 5 moles of H2O, the molar mass of H2O is 18, s..

The specific heat capacity of water vapor is 2.01 J g-1 oC -1How much heat (kJ) must be removed in order to change 2.51 moles of steam at 111.0 o..

I have a bunch of them. Ive been told that they are cute. I think it says something about your personality. I wouldnt have them removed unless th..

The specific heat capacity of solid water is 2.03 J g-1 oC -1How much heat (kJ) must be removed in order to change 2.18 moles of water at 57.0 oC..

There are three heat calculations you have to do here: 1) the heat that must be removed to cool the liquid water to 0 deg C 2) the latent heat of..

I wont do your homework for you, but Ill guide you through it. Convert the mole value to mass of water. Use the heat capacity of water and the ma..

And will coating them in cayen pepper also help keep them put? I am using a bulb booster fertilizer instead of blood meal to keep from attracting..

need to use dimensional analysisHow many atoms of Magnesium would you have if you have 3.4 moles of magnesium atoms?3.4 moles Mg x 6.022*10^23 Mg..

antsNoticed sand mounds in garden what animal or pest creates this. its not moles?Moles dont limit themselves to the garden, if you had moles the..

.173 moles of CaCo3 _ I am absolutley positive of this example i just had a test in chemistry on itA sample of CaCO3 has a mass of 17.314 g. How ..

oC ? The specific heat capacity of solid water is 2.03 J g-1 oC -1 Use a negative sign in your answer if heat is removed.How much heat (kJ) mus..

H2SO4 2H+ + SO42- H2SO4 + 2NaOH Na2SO4 + H2O The ratio between H2SO4 and NaOH is 1 : 2 moles OH- needed = 3.2 x 2 = 6.4 V = 6.4 / 1.75 = 3.66 LWh..

The specific heat capacity of water vapor is 2.01 J g-1 oC -1Use a negative sign in your answer if heat is removed.How much heat (kJ) must be rem..

1 mole KCl = 1 mol K and 1 mol Cl 2 mol KCl = 2 mol K and 2 mol Cl 2 mol Cl X (6.02 X 10^23) = ions Cl = 1.204 X 10^24 ions ClHow many chloride i..

They eat primarily grub worms. You have to spray the lawn with some kind of insecticide to kill the grub worms. Ask your local garden store what ..

Because the masses in the periodic table are grams per one mole of the substance. Atoms and molecules are too small to measure in grams. Therefor..

Cu Mw = 63.55 g/mole Zn Mw = 65.39 g/mole 67 g Cu = 1.054 mole Cu but we know that but we know the brass is 67% Cu and 33% Zn so molesCu/molesZn ..

5.0 x 10^21 atoms X I mol C 6.02 x 10^23 atoms = 8.3 x 10^ -3 moles of carbon 8.3 x 10^ -3 moles of carbon X 12.0 grams C 1 mole of C =10. grams..

-log(3.6 x 10 -7)=6.4436975The hydrogen ion concentration of mouthwash is about 3.6 x 10 -7 moles per liter. Find the ph (show steps)?pH = 鈭抣og10..

Assuming were at STP, 1 mol= 22.4 L .43 mL= .00043 L = .0000192 mol

The specific heat capacity of water vapor is 2.01 J g-1 oC -1How much heat (kJ) must be removed in order to change 3.03 moles of steam at 115.0 o..

solution volume of 636mLWhat is the molarity (in mol/L) of a solution of 1.65 moles of LiCl dissolved in enough water to make a total?M = mol / L..

i have the song track but its not on itLooking for a song with theses words in it underground with the moles digging holes from disturbing behavi..

Since the coefficents of the substances in the balanced equation represent their number of moles, it is more practical to convert the amounts giv..

Save yourself a trip to the store and call them. Speak to a pharmacist and ask your question. Good luck.Is there any products that i can get at w..

a. 135 mL H2 b. 8.96 L N2 c. 0.75 L HeGiven the following volumes of gases at STP, calculate the number of moles of each gas and the mass of the ..

if you look on periodic table 1.008 g of hydrogen contains 1 mole of hydrogen. (took chemistry long ago)Explain how the mass of a substance relat..

Use the following formulas No of molecules = no. of moles x Avs number No of moles = weight of compound / molecular mass of compoundHow many mole..

(4.25 x 10^25) / (6.02 x 10^23) = molesConvert 4.26x10 to the 25th power molecules of hydrogen,H2, to moles of hydrogen,H2?By definition, in Chem..

Ive put poison pellets around the yard and its not workingIm having a real hard time trying to get rid of moles that I have in my yard. How do I ..

help!A diamond contains 7.0 x10^21 atoms of carbon. How many moles of carbon are in this diamond?Cross multiply: 7.0*10^21 atoms carbon X 1mol ca..

There are two methods that you can use. Method 1 you can multiply it by its density (at the said temperature and pressure) to convert to mass and..

Help! Im really awful at chem.A sample of sulfur has a mass of 223.00g. How many moles of sulfur are in the sample?1 mol of Sulfur equals 32.006 ..

Freeze, burn, or surgery?What is the most non-painful and least expensive way to remove moles?So I found this product called Bio-T it is all natu..

Sulfur dioxide reacts with chlorine to produce thionyl chloride and dichlorine oxide SO2(g) + 2Cl2(g) 鈫?SOCl2(g) + Cl2O(g) A.0.800 mol B.0.400 m..

i just got back from a month homestay in japan and i couldnt help but notice these two things. Dose it have something to do with what they eat or..

I have tons of moles and freckles on my arms and shoulders, and Im 20 years old. Im not going to count how many, but on one arm I have more than ..

Use the molecular weights. This will be the sum of the atomic weights, which can be found in the periodic table. Find the molecular weight of MgS..

using this reaction.. ch4+2o2 -- co2+2h2oHow many grams of oxygen are needed to react completely with 10 moles of methane(ch4)?since u have a bal..

To answer this question, you need to write a balanced equation for the reaction. Now you know that ammonium nitrate is the reactant and that one ..

In 1 Kg there are 330 g Zn 330 g / 65.37 g7mol = 5.05 moles

stoichiometryIn stoichiometry if 50 g of CO2 was completely reacted, how many moles of O2 would be produced?The chemical equation 6 CO2 + 5 H2O-..

Witches are depicted as evil in scripture. Why mess with the dark side?Why do people reject witches?we dont fly on brooms or have moles bigger th..

all i have is that there is .05L of sodium carbonate and well thats it. Chemistry is so stupid.I NEED CHEMISTRY HELp. I need to find the total n..

1.5 moles, or 36.5 gramsWe needed to make 1.5L of 1.0M HCl. How many moles of HCl were use.?You would need 1.5 moles of HCl. 1M simply means 1 mo..

i have a few to remove and i dont know where to look or who to ask so i thought this would be an easy way to find help