A4217 sterile water saline
2grm iodine and 4grm KI add to 1000ml of water
.256 molar= 256 mols of solute per 1000ml of solution. Since there are 1000ml in 1L, there are 256 mols of BaCl2 for every liter. Multiply this by 1.5 and you get a total of 384 mols of BaCl2 in 1.5L of a .256 molar solution
Reference: the density of 25% NH4OH solution = 0.907g/cm³ Therefore 1 litre of solution has mass 907g 25% = 25/100*907 = 226.75g NH3 in 1 litre solution Molar mass NH3 = 17.031 g/mol 226.75g = 226.75/17.031 = 13.31N solution To make 1 litre of 2N solution: ( Work in ml= 1000ml) N1V1 = N2V2 13.31*V1 = 2*1000 V1 = 2000/13.31 V1 = 150.2ml Measure out 150.2ml of the 25% solution and dilute to 1 litre. This is a 2N solution.
3.00 M, or 3 moles per (L) "liter" calls for having 3 moles per liter of the solution. The question asks how many moles must be in 250ml of a solution that has 3 moles per Liter. You must ask yourself what percent of 1 Liter is 250mls? Since there are a thousand ml in one liter, (1000ml=1L), then 250ml is exactly 25% of a Liter, or .25L. So, 250ml can only hold 25% of the 3.00 Molarity. Meaning that you multiply 3 x .25 and get .75 moles.
Keep in mind that concentration (mol/L) = (# of moles) / (volume (L) ) Find the volume in litres is easy: 25.0mL + 55.5mL = 80.5 mL = 0.0805 L Now we have to find the number of moles of Chlorine (Cl) moles of Cl in 25.0mL of NH4Cl = (25.0mL)(1 L/1000mL)(0.2450mol NH4Cl/1L)(1 mol Cl/1 mol NH4Cl) = 0.006125 mol Cl moles of Cl in FeCl3= (55.5mL)(1 L/1000mL)(0.1655mol FeCl3/1 L)(3 mol Cl/ 1 mol FeCl3) = 0.02755575 mol Cl Total moles Cl = 0.006125 + 0.02755575 = 0.03368075 mol Cl Concentration = (0.03368075/0.0805) = 0.418 mol/L Cl
The concentration of the diluted solution will be 15(300/1000) = 4.5 %, if the percent is expressed on a weight/volume basis.
50ml Way to find: 5/100 * 1000ml
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The answer would depend in part on the densities of the solvent and the solute.
Take the ratio of (10ml/1000ml) and multiply by 100 to find the percentage. It turns out to be (10/1000) x 100 = 1000/1000 = 1% and you are right - 10ml is 1% of 1000ml
yes
0.9% means there is 0.9 grams NaCl per 100ml of solution. So 1000 ml of 0.9% sodium chloride contains 9.0 grams of NaCl.
2400 mg is what percent of 1000 ml"?
2grm iodine and 4grm KI add to 1000ml of water
20% salt solution is the equivalent of adding 200gr salt in a 800 ml (1000ml -200ml) of water. you now have one liter of a 20% solution.
.256 molar= 256 mols of solute per 1000ml of solution. Since there are 1000ml in 1L, there are 256 mols of BaCl2 for every liter. Multiply this by 1.5 and you get a total of 384 mols of BaCl2 in 1.5L of a .256 molar solution