Homework Answers
Molar mass of BaCrO4 = 233.39g/mol
Molar mass of Cr = 52.00g/mol
Conversion factor of BaCrO4 to Ba = 52.00g/233.39g = 0.2228
mass of Cr in BaCrO4 precipitate = 0.2228× 0.145g = 0.032306g
mass of Cr in 250ml Cr2O72- solution = (0.032306g/10ml)×250ml = 0.8077g
mass of the steel sample = 3.90g
% of Cr in the steel sample = (0.8077g/3.90g)×100
% of Cr in the steel sample = 20.71%
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I Review I Constants Periodic Table ▼ Part A A stainless-steel-bottomed kettle, its bottom 24 cm in diameter and 1.9 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 900 W What is the temperature of the bottom surface of the kettle? Thermal conductivity of stainless steel is 14 w/(m·K). Express your answer using four significant figures. oC
< on 10 of 28 A Review Constants Periodic Table Part A What is the boiling point of a solution made using 731 g of sucrose, C12H22011. in 0.300 kg of water, H2O? Express your answer in degrees Celsius using five significant figures. View Available Hint(s) VO AO ? °C Submit Part B What is the freezing point of a solution that contains 26.4 g of urea, CO(NH2)2. in 225 mL water, H2O? Assume a density of water of 1.00...
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3 of 28 > A Review Constants Periodic Table Part A You have prepared a saturated solution of X at 20°C using 37.0 g of water. How much more solute can be dissolved if the temperature is increased to 30°C? Express your answer numerically in grams. View Available Hint(s) Templates Symbols undg Pedo reset keyboard shortcuts help R B Submit < 4 of 28 M Review Constants Periodic Table Part A Calculate the mass percent of a solution that is...
s 1 Periodic Maleic acid is a carbon-hydrogen-oxygen compound used in Review Constants | Periodic Table dyeing and finishing fabrics and as a preservative of oils and fats Answer Requested . The molecular formula for maleic acid is C4H404 . When 0.609 g of maleic acid is dissolved in 25.00 g of glacial acetic acid, the freezing point drops by 0.82 °C. Maleic acid does not ionize in glacial acetic acid, which has a freezing-point depression constant ot Kr 3.90...
s 1 Periodic Maleic acid is a carbon-hydrogen-oxygen compound used in Review Constants | Periodic Table dyeing and finishing fabrics and as a preservative of oils and fats Answer Requested . The molecular formula for maleic acid is C4H404 . When 0.609 g of maleic acid is dissolved in 25.00 g of glacial acetic acid, the freezing point drops by 0.82 °C. Maleic acid does not ionize in glacial acetic acid, which has a freezing-point depression constant ot Kr 3.90...
2559b3823f31 > 8 of 28 A Review Constants Periodic Table ✓ Correct Part B What is the final volume V2 in milliliters when 0.572 L of a 43.8 % (m/v) solution is diluted to 21.2% (m/v)? Express your answer numerically in milliliters. View Available Hint(s) ? ml IVO AXO V₂V_2= Submit 8 of 28 M Review | Constants Periodic Table Part C A 554 ml NaCl solution is diluted to a volume of 1.08 L and a concentration of 2.00...
Item 15 15 of 28 Review I Constants I Periodic Table 3+ A solution contains Cr and Mg. The addition of 1.00 L of 1.53 M NaF solution is required to cause the complete precipitation of these ions as CrF3 (s) and MgF2(s). The total mass of the precipitate is 49.8 g You may want to reference (Pages 331 - 336) Section 8.5 while completing this problem Part A Find the mass of Cr3+ in the original solution. V ΑΣφ...
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PassignmentProblemID=138307351 < 1 of7 Review Constants 1 Periodic Table Part A Calculate the mass percent of a solution that is prepared by adding 71.3 g of NaOH to 328 g of H20. Express your answer numerically. View Available Hint(s) O AED O 2 ? % (m/m) Submit Part B Calculate the mass/volume percent of a NaCl solution in which 102 g of NaCl is dissolved in enough water to give a total volume of 3.10 L Express your answer numerically....
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