hydrogen peroxide is a 3.0% solution, what is its molarity if the density is 1.0g/mL?
144551
since the density is 1 it doesn't matter how the % was calculated. usually you need to be specific.\n3% is 3mls peroxide/100 mls or 30 mls(30gms)/1 L\n30/molar mass = 0.88M for concentration.
832170
Molarity = moles of solute/liters of solution\n15.8 g of HF = 1.01 + 19 = 20.01 g/mol\n15.8 g HF / 20.01 g/mol HF = 0.790 mols of HF\n0.790 moles of HF / 0.200 L of solution = \n3.95M solution
32482
To find how many grams are in a solution, you need to know how many moles there are. \n\n1 M= 1 mole/L\nor Molarity = moles/volume\n\nmoles= Molarity*volume= (0.033 L)(0.150 M)=.00495 moles.\nYou have to convert mL to L because molarity is in L.\n\nGrams is moles multiplied by molar mass.\nMolar mass is calculated by adding the masses of the individual elements.\nmolar mass= 2N + 8H + 1S + 4O\n=2(14.0) + 8(1.00) + 1(32.1) + 4(16.0)\n=164.2 g/mol\n\ngrams= (164.2 g/mol)(.00495 mol)= .81279 g (NH4)2SO4\n\ngrams= 0.813 g (NH4)2SO4.  (sig figs)
529314
The molarity of a solution is the number of moles of a substance per liter of solution.\n\nMolarity = moles/liter\n\nSo, if you know what your solute is, you need to calculate the number of moles you have by:'\n\nmoles = mass of solute/molecular weight of solute\n\nnumber of moles is then divided by the number of liters you have, and voila!  Molarity.\n\nExample:  40 grams of sodium chloride in 500 mL of water:\n\n40 gm NaCl/58.443 grams per mole = 0.6844 moles\n\n0.6844 moles/500 mL * 1000 mL/liter = 1.369 moles/liter  or the solution is 1.369 M sodium chloride in water.
732197
The density can be assumed to be 1.0 g/ml.  \n\nSo you have 25 ml x 1.0 g/ml = 25 g H2O\n\nThe molar mass of water is 18 g/mol, so you have:\n\n25 g H2O/18 g H2O/mol H2O = 1.4 mol H2O
343969
you would also use one of the following equations typically depending on the other information your given, but for sure, you need to look up its chemical composition. (ex: water is H2O)\n\nif youre given concentration:\nconcentration=moles/volume\nmoles=mass/molar mass\nmass=moles*molar mass\nmass=(concentration*volume)(molar mass)\nkeep in mind molar mass can be found by adding and multimplying as necessary the atomic masses of each element in the compound.\n\nif youre given density (which i bet you can easily look up on google or something if youre not given that information):\ndensity=mass/volume\nmass=density*volume
735942
Go to the store and buy a bottle of 3% hydrogen peroxide, pour some into a 150ml beaker and you are done.
820326
If this is in Normality;\n\n0.1 Normal solution of  NaOH\n2 grams of NaOH  in a liter = 0.05 N\n\nN = weight in grams divided by MW (molecular weight ) = 40 / valence =1 / 1 liter. = 0.05\n\nMW = (Sodium) 23 + 16 (Oxygen) + 1 (hydrogen) = 40\n\nTherefore: Using the formula N1V1 = N2V2\n(0.1)( X) = (0.05) ( 1 liter)\n\nBy cross multiplication:\n\nX = (.0.05) ( 1) divided by ( 0.1) \nX =  0.5 liters or 500 milliliters\n\nbecause  1,000 ml = 1 liter\n\nYou will get the same answer for Molarity because the valence is one.\n\nso the answer is 500 milliliters.
324991
Mole ratio is the percentage of different molecules in a substance.\nexample H2O molecular wight is 18,and hydrogen-1,and oxygen-16. so mole ratio of hydrogen=2/18(100)=11.11%\nsimilarly for oxygen M/R=16/18(100)=88.89 This is mole ratios of Hydrogen and oxygen in water
329838
Density = mass / volume\nSo 514 g/500mL = ??? g/mL\nAnd that's all of your homework I'll do for you. ;)
850425
KOH + HNO3 ---> KNO3+ H20\n\nmoles of KOH = 0.025L*0.2mol/L = 0.005 mol\nconcentration of nitric acid solution = 0.005mol/0.030L = 0.167M\nconcentration of KNO3 = 0.005mol/0.055L = 0.091M
653935
A part per million is equal to:\none penny in $10,000 \none minute in two years \none dime in a one-mile-high stack of pennies \n\nOne part per million is the same as 1 mg/L for water solutions. This can be shown as follows:\n1 mg = 10*-3 g; 1 L = 10*3 mL\nThe density of pure water is measured in g/mL, therefore \n10*-3 g/10*3 mL = 10*-6, or 1 ppm.
598825
Peroxide is H2O2. If it were in a clear bottle, that second oxygen would evaporate and it would become H20...water.
905387
Molarity is simple.  The formula is Moles of Solute divided by Liters of solution. \n\nThe solute is the smaller amount, if you get confused with the solute and solvent.  Many times the solvent is water.
1125846
NaVO3, MW = 122 g/mol\n\n100 mM = 0.1 M, so 0.1 moles in 1 L.  Dissolve 12.2g in water, dilute to 1L.
864912
one mole of hydrogen peroxide contains 6.02 x 10^23 molecules of hydrogen peroxide. And each molecule contains 4 atoms, so the answer is 4 x 6.02 x 10^23.\n\nRemember - a mole is a quantity of something, a mole of cars is 6.02 x 10^23 cars. And that's a lot of cars and even more atoms.
808549
M=molesof solute/Liter of solution\n\nM= molarity