Calculate the number of grams in these quantities:
55.0 mL of K2CrO4 solution (d = 1.175 g/mL, 20.0% K2CrO4 by mass) to g
Calculate the number of grams in these quantities: 55.0 mL of K2CrO4 solution (d = 1.175...
A. How many milliliters of 0.110 M HCl are needed to completely neutralize 55.0 mL of 0.107 M Ba(OH)2 solution? Express the volume in milliliters to three significant digits. B. How many milliliters of 0.125 M H2SO4 are needed to neutralize 0.170 g of NaOH? Express the volume in milliliters to three significant digits. C. If 55.0 mL of BaCl2 solution is needed to precipitate all the sulfate ion in a 746 mg sample of Na2SO4, what is the molarity of the solution? Express the molarity...
Calculate the molarity of a 200 mL HCl solution if the solution contains 5.43 grams of HC:i HCl molar mass 36.46 g)
Calculate the number of grams of Feo in 300.0 mL a 0.25 M FeO solution. O 3.5g O 53.98 O 75.0 g O 12.0 g O 5.48
Calculate the following quantities: (a) mass, in grams, of 1.50 x 10^-2 mol CdS (b) number of moles of NH4Cl in 86.6 g of this substance (c) number of molecules in 8.447 x 10^-2 mol C6H6 (d) number of O atoms in 6.25 x 10^-3 mol Al(NO3)3
Calculate the pH of the solution that results from each of the following mixtures. 55.0 mL of 0.15 M HCHO_2 with 70.0 mL of 0.13 M NaCHO_2 120.0 mL of 0.13 M NH_3 with 260.0 mL of 0.13 M NH_4C1
A 77.0-ml sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction occurs: K2SO4(aq) + Pb(NO3)2 (aq) + 2 KNO3(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 3.71 g. Determine the percent yield. 1 mole PbSO4 = 303.26 g Hydrazine, N2H4, is a liquid used as a rocket fuel. It reacts with oxygen to yield nitrogen gas and water....
4. To 43.4 mL of 0.221 M K2CrO4 solution are added 71.8 mL of 0.527 M ZnCrO4. Calculate the molar concentrations of each ion present in the combined solutions. 7. A 30.0 mL sample containing citric acid (H3C6H5O7), a triprotic acid, is titrated (neutralized quantitatively) with a solution of 0.106 M KOH. The titration requires 26.5 mL of the KOH solution. Calculate the molar concentration of the citric acid solution. Also, identify the salt formed in the reaction and calculate...
A standard stock solution of Cr6+ was prepared by dissolving 0.507 g dried K2CrO4 (formular mass=194.1896 g/mol) in deionized water and diluting to 100 mL in a volumetric flask. What is the concentration of the standard solution in units of g Cr/L? The molar mass of chromium is 51.9961 g/mol.
A 77.0-mL sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction occurs: K2SO4(aq) + Pb(NO3)2 (aq) ⟶ 2 KNO3(aq) + PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 3.71 g. Determine the percent yield. 1 mole PbSO4 = 303.26 g Group of answer choices 98.4% 80.0% 120.% 75.7%
1- Calculate the number of grams needed to make 1 mL of a 1M solution of the oligonucleotide (32nt) 2- You have a 300 μM solution of a primer (45nt) in a volume of 400μL, how many μg of primer do you have total? 3- You received a primer (25nt) which came to you as a powder with a mass of 0.31 mg a- what concentration of primer do you have when you add 100μL water? b- How would you...