STARTING AMOUNT X (0.01)³ * ( ) 1 0.076 0.1 (100)³ cm³ Convert 7.6 7.6 1000 m³ cm³ to (0.1)³ 0.01 cm m³ 7.6 x 10-6 (1)³ m 2 (1000)³ 100 7.6 x 104
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- 1.) In the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a volatile liquid that boils below 100 oC is vaporized in a boiling water bath and the mass of the vapor required to fill the flask is determined. The following data was collected: Flask Volume 100.0 +100.0 + 79.6 mL = 279.6 mL Mass of Flask + Cap 143.85 g Mass of Flask + Condensed Liquid 144.95 g Mass of Condensed Liquid 1.10 g Temperature of Water Bath (oC) 84.1 oC Barometric Pressure (atm) 0.985 atm a.) What is the molar mass of the unknown? b.) What will its temperature be when the pressure is 1.20 atm and the volume is 250.0 mL?A student sets up and solves the following equation to solve a problem in solution stoichiometry. Fill in the missing part of the student's equation. 6.9 ml)(0.11 1) (119.86|[]) = 91. g x10 X μ 00 5(The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. (-5.1 x 10' Pa cm' 3 3 = ? kPa·m x10
- The following ratios of NaOH to HCl were determined in an analysis: T1 = 0.9958, T2 = 0.9929. How much is the precision?What is the pH of (3.21x10^-1) M C5H5NHBR? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 AnswerStraight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula CnH2n+1COOH where n is an integer than ranges from 1 to 18. What would be the %C by mass if n = 1 ? Atomic weights: C=12.01, H=1.01, O=15.99. Input values only with 2 decimal places. Do not include the units.
- Straight-chain, saturated carboxylic acids, a class of hydrocarbons, have the general formula CnH2n+1COOH where n is an integer that ranges from 1 to 18. What would be the %C by mass if n = 8? Atomic weights: C = 12.01, H = 1.01, O = 15.99. Input values only with two decimal places. Do not include the units.The three sets of units for expressing density (or concentration, as in “mass of solute per unit volume of solvent”) below are equivalent: kg⁄L = g⁄mL =g cm! ⁄a) Using dimensional analysis, show that the above expression is true.b) What is 1.0 kg⁄L = 1.0 g⁄mL = 1.0 g cm! ⁄ expressed in SI base units?What is true for this chemical reaction: CO₂(g) + 4H₂(g) = CH₂(g) + 2H₂O(g)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a AHxn>0; ASrxn > 0 b C d AHrxn 0 AHrxn < 0; ASrxn < 0 AHxn 0; ASxn < 0
- A solution of 75 mM tartaric acid (C4H,O6) in water is used as a standard in HPLC analysis. How many grams of C4H,O6 ·H2O are needed to make up 10 ml of solution?Straight-chain, saturated carboxylic acids, a class of hydrocarbons, has the general formula CnH2n+1COOH wheren is an integer than ranges from 1 to 18. What would be the %C by mass if n = 12 ? Atomic weights: C=12.01, H=1.01, O=15.99. Input values only with 2 decimal places. Do not include the units.4. The results of the analysis of a metal alloy were reported in terms of percent Cu (%Cu). The values obtained are 17.34%, 17.33%, 17.28% 17.29%, 17.36%. The expression of the central value significant to chemists is the arithmetic mean (or average) is the sum of the measured values, x;, divided by the n, number of replicate measurements. 7 = (1tr2+x3+» ·+xn %3D a. The mean or the average %Cu is b. The deviation from the mean, d;, is the difference (regardless of sign) between the experimental value and the arithmetic mean. The deviation is always the absolute value of the difference between the experimental data and the mean. d; =| x; - The deviation of the experimental data 17.29% from the mean is