Calculate the Kovats retention index for an unknown using the retention times 1.5 min for CH,,...
Three compounds, octane, nonane, and an unknown molecule, were separated using gas chromatography. The adjusted retention times were 14.1 min for octane, 21.5 min for nonane, and 19.0 min for the unknown. The retention indexes for the alkanes are 800 for octane and 900 for nonane. Calculate the Kovats retention index for the unknown. I = ____
3c. The retention times tr for compounds A and B are 7 min and 5.5 min, respectively. Knowing that the column void volume is V0 = 1 ml and that the solvent flow rate for compound A is rA = 1 ml/min and for compound B is rB = 2 ml/min, calculate the retention (or capacity) factors for compounds A and B. 3d. Calculate the selectivity factor α for compounds A and B above and indicate if the two compounds...
Calculate the molar mass of your unknown solute using the accepted literature Kf value of 8.3 for t-butanol and the change in temperature of 9.10 degrees celcius. Grams of the unknown solute= 0.631g. Grams of solvent (t. butanol)= 12.230g.
Calculate the gtt/min flow rate using the formula method (show your work) A volume of 300ml to infuse in 6hr on a 60gtt/ml microdrip set 1 i B I Ff T:- Sis
Calculate the molar mass of your unknown using delta T between experimental fp of pure water and fp with ~0.10 g of unknown. All unknowns are assumed to have i=1 unless given otherwise during the lab. Data Initial Temp for Pure Water 23.4°C Final Temp for Pure Water 0°C Initial Temp for H2O + unknown (~0.10 g) 5.2°C Final Temp for H2O + unknown (~0.10 g) -0.2°C Mass of Water 20.0 g Mass of Unknown 0.090 g
Calculate the pH of each solution. [H_3O^+] = 6.2 times 10^-6 M Express your answer using two decimal places. pH = 5.21 [H_3O^+] = 6.4 times 10^-4 M Express your answer using two decimal place t.
1-3. Complete the t-accounts below using the transactions listed (1.5 pts). 4. Calculate the ending balance of each account (.5 pts). • styx. issues a $1,000 bond in order to raise cash • styx. issues $5,000 in stocks to raise cash • styx. spends $2,400 of its cash to purchase a new tuning machine Cash Debits Credits $7,500 Bonds Debits Credits Equity Debits Credits $2,000 $6,000 Equipment Debits Credits $500 5. Complete the Accounting Equation below (-5 pts). 6. Circle...
The mean and the standard deviation of the sample of 100 bank customer waiting times are x¯x¯ = 5.14 and s = 2.321. Calculate a t-based 95 percent confidence interval for µ, the mean of all possible bank customer waiting times using the new system. Are we 95 percent confident that µ is less than 6 minutes?. Assume normality. (Choose the nearest degree of freedom for the given sample size. Round your answers to 3 decimal places.) The t-based 95 percent confidence interval is [, ]. (Click to select)YesNo , interval is (Click to select)lessmore than...
Please help me out with this assignment as soon as possible Thabk You Ch.5 -Circular Motion 6. According to Newton's Law of Gravitation, if the distance between two bodies is doubled, the attractive force between them becomes ( twice as large. Show reasoning: 0 half as large. four times as large. ( one quarter as large. 0 unchanged. fourt Kepler's third law can be simplified to T/r=1 or Tar if the orbit period T is expressed in earth years and...
any help appreciated! especially checking with what i already have for sig figs! (2) Calculate the approximate random error ∆h = (1/2) [h(max) - h(min)], where h(max) and h(min) are the highest and lowest values of h. ∆h refers to the random error in each measurement of h. (3) Calculate the average hav = (1/8)[h1 + h2 +…+ h8] and the error in the average ∆hav = ∆h/√8, of the eight trials. ∆hav gives an overall estimate for the random...