Having trouble with this problem. Hear capacity of aluminum: 900J/kg C <Chapter 15 Problem 15.45 A 2.8-kg piece of aluminum at 28.9°C is placed in 1.0 kg of water in a Styrofoam container at room temperature (20.0°C) Part A Estimate the net change in entropy of the system. Express your answer to two significant figures and include the appropriate units. HA ? AS Value Units Submit Request Answer < Return to Assignment Provide Feedback
Please help !! Problem 15.45 1 R At 100°C, K = 0.078 for the reaction SO, C12(9) SO2(g) + Cl2(9) In an equilibrium mixture of three gases, the concentrations of SO,Cl2 2 and SO2 are 0.100 M and 0.11 M respectively. Part A What is the partial pressure of Cl, in the equilibrium mixture? Express your answer using two significant figures. O AE O a? P- atm Submit Previous Answers Request Answer X Incorrect; Try Again Provide Feedback
what is the level of uncertainty in the number 15.45 stion 12 points What is the level of uncertainty in the number 15.45 Tens Place Hundredth place Tenth place 3. Ones place
required for this part. Part Convert a volume of 5250 cm to cubic meters. Express your answer numerically in cubic meters. View Available Hint(s) 1 VALDO volume Submit Provide Foedback bo
15.45 grams of solid potassium chlorate decomposes when heated to form solid potassium chloride and oxygen gas. Assuming 100 % yield, how many grams of solid potassium chloride will be produced? 6 IMo Xmo SUC Aniou1120
Part A When titrated with a 0.1038 M solution of sodium hydroxide, a 52.00 mL solution of an unknown polyprotic acid required 22.86 mL to reach the first equivalence point. Calculate the molar concentration of the unknown acid. VALDO ? Submit Request Answer
Part A How far apart are an object and an image formed by an 70-cm-focal length converging lens if the image is 2.50 x larger than the object and is real? Express your answer using two significant figures. VALDO d. + d. Submit Request Answer
both question are from the same questions Part B 0.314 L N2 IVO AQ 0 a ? MN,= Submit Request Answer Part 132 cm? Ar AXO Submit Request Answer Provide Feedback Exercise 11.88 Calculate the mass of each gas sample at STP. - Part A 5.84 L NO NO - 7.82 5 Previous Answers All attempts used: correct answer displayed Part B 0316LNE DVD AX ROS? Submit Part C 132 cm Ar VALDO ? Submit Provide Feedback
Part C. Calculate how many times more soluble Mg(OH), is in pure water Based on the given value of the Kp, calculate the ratio of solubility of Mg(OH), dissolved in pure H, 0 to Mg(OH), dissolved in a 0.180 M NaOH solution Express your answer numerically to three significant figures. View Available Hint(s) VALDO ? ratio
Figure 15.45 shows a gravity retaining wall retaining a granular (c' = 0) backfill. The same soil is present at the bottom of the wall and on the left. The unit weight and the friction angle of the backfill are 18.5 kN/m3 and 35°, respectively. The unit weight of concrete is 24.0 kN/m3. Determine the factors of safety with respect to overturning, sliding, and bearing capacity failure. Use Rankine earth pressure theory.