Density of lead 75.63g (4 rods), start 21.0 ml, end 16.80ml

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o NB3: What is the dilution factor of the 50 mM stock solution relative to the 1 mM solution? Relative to another 100 mM stock solution?

Concentrated Standard Solution: 3.0168 weighed mass (NH4)2SO4-FeSO4-6H2O g in L of solution 99.70 purity (NH4)2SO4-FeSO4-6H2O Volume 2.000L Diluted Standard Solution mass (NH4)2SO4-FESO+-6H2O per L of solution mg/L(or ppm)** Fe concentration (using % purity) ppm

Find the percent by mass of sodium chloride in a 1.20 M NaCl solution. The density of the solution is 1.07 g/mL. [ΨΕΙ ΑΣΦ esc Submit Provide Feedback ! 1 Request Answer F1 A @ 2 F2 W S ? #3 80 F3 % E S4 $ D a F4 R % 5 F 2 F5 MacBook Air T 6 F6 G & < 7 Y

5. The mineral analysis below was reported for a water sample. Calcium 90 Chloride 120 Magnesium 30 Sulfate 170 Iron (Fe**) 5 Bicarbonate 165 Sodium 10 pH 7.5 units Potassium 6. Note: All reported as "mg/L as the ion" unless stated otherwise. Draw a bar chart that includes all the ions listed above. (Remember to convert to appropriate units) b. What is the total hardness of the water using ALL multivalent cations in mg/L as а. CACO3? c. What is the total hardness of the water using the predominant polyvalent cations in mg/L as CaCO3? d. What is the percent error in using only the predominant polyvalent cations? e. What is the carbonate hardness of the water in mg/L as CaCO3? f. What is the non-carbonate hardness of the water in mg/L as CACO3?

Biological studies have found that aqueous solutions containing as little as 28 µg of allicin per milliliter inhibit bacterial growth. Express this amount as the number of moles of allicin per liter of solution. \(28~\text{ug/mL}=\) \(text{mol/L}\) 20 F3 II F8 F4 F5 F6 F7 F9 F10 F11 F12 & %24 4. 3 5 7 9 { } P E T Y U %3D * CO R %23

I need help with this question please! Use dimensional analysis please!?