14.9 g ice cube is placed into 332 g of water. Part A Calculate the temperature change in the water upon complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q= MCAT to calculate the temperature change of the 332 g of water. AT = PC Submit Previous Answers Request Answer
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- Prepare 1L 20X Trace minerals stock in a media bottle: Fill out the last column of this table: Component NaCl MnSO4.H₂O H3BO3 CaSO4.5H2O NazMo04.2H₂O COSO4.7H2O KI CaCl2.2H₂O NiCl2 ZnSO4.7H2O FeSO4(NH4)2. 6H20 1X concentration 0.06 g/L 0.024 g/L 0.5 mg/L 0.5 mg/L 2 mg/L 0.0023 mg/L 0.1 mg/L 0.2 g/L 0.0025 mg/L 12 mg/L 35 mg/L 20X (Provide unit)Based on the ternary phase diagram, a binary mixture of furfural and water will always split into two liquid phases: 1) 95 % furfural, 5 % H20 and 2) 92 % H20. 8 % furfural. Etylene Gyesl Single phase region Two phase region 03 02 M Furfural Water Mass fraction furtfural FURFURAL-WATER MIXTURE Neither true nor false The actual composition depends on other experimental parameters. False O True Mass fraction O O OA solution is made by dissolving 0.641 mol of nonelectrolyte solute in 763 g of benzene. Calculate the freezing point, T;, and boiling point, Tp, of the solution. Constants can be found in the table of colligative constants. %3D °C Tp = °C
- Water Properties Submit 4 7) 8. 10 1 of 10 B IU x X, 5 C 0/10000 Word Limit (d) The arrangement of the water molecules in ice causes the ice to float. Explain how ice floating on the surface of a body of water affects the water in a way that beneficial to the organisms in it. В I U x? X2 5 ¢ Ω 0/10000 Word Limit II !!Lab Data Verify your concentration calculation. Did you report your data to the correct number of significant figures? Stock solution Concentration iron(III) nitrate 0.40000 [Fe(NO3)a] (M) Color of iron(III) nitrate yellow Concentration potassium thiocyanate [KSCN] (M) 0.00300 Color of potassium thiocyanate colorless Volume iron(III) nitrate (mL) 10.00 Volume potassium thiocyanate (mL) 2.00 Volume DI water (mL) 8.00 Concentration iron(III) thiocyanate ion in stock solution [FESCN2"] (M) 0.000300 Color of stock solution red-orange Diluted solutions Solution 1 Solution 2 Solution 3 Volume stock solution (mL) 4.00 4.00 4.00 Volume DI water (mL) 1.00 2.00 3.00 Concentration iron(III) thiocyanate ion [FeSCN2*] (M)Estimate the pH of a 7.18 x 106 M HF solution. You can calculate the lowest possible pH, knowing that the actual value will be higher. Your answer should contain 3 decimal places as this corresponds to 3 significant figures when dealing with logs. pH will be above Select the solution with the highest pH. Multiple Choice 0.0225 MLIOH 0.0225 MH2CO3 0.0225 MCH3NH2
- (m-c-AT)metal = (m-c-AT)water 4. Re-arrange the following equation to solve for SHmetal 100 g bowl of cornflakes cereal without milk? water (100 mL) to climb to 68.4°C. How many food calories (Calories) are there in a 3. If burning 1 gram of cornflake (in a calorimeter) caused the temperature of 23.0°CThe Thermal conductivity of rock salt measured at a temperature of 500 degrees C what value would be the closest ?Assignment Score: 74.6% Resources O Hint Check Answer < Question 17 of 28 Each value represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or neutral. Acidic Basic Neutral Answer Bank H|= 1.0 x 10-7 РОН 3 7.00 pH = 8,39 OH= 9.0 x 1o POH = 5.34 POH = 10.32 H = 5.0 x 10 [H- 3.5 x 10-D pH= 5.50 OH = 8.9 x 10
- B. BOILING POINT ELEVATION Kb (°C/m) of water 0.5121 Boiling Point of Water, 100.0 °C SOLVENT 100.0 g water Mass / Volume added Added reagent Molecular Weight van't Hoff Factor Boiling Point m 20.0 g NaCl 58.44 25.0 g Al(NO3)3 213 0.200 10.0 mL MglycerolA rescarcher studying the nutritional value of a new candy places a 4.40 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.30 "C. If the heat capacity of the calorimeter is 45.00 kJ-K-, how many nutritional Calories are there per gram of the candy? Calories of candy: Cal/g per gramPart C - Specific heat of water The table shown here lists the specific heat of several substances. Specific heat Substance J/g/°C water 4.18 ethyl alcohol 2.44 benzene 1.80 sulfuric acid 1.40 Based on the information in the table, which of the following statements are true? Select all that apply. View Available Hint(s) More heat is required to raise the temperature of 1 g of water 1°C than to raise the temperature of 1 g of ethyl alcohol 1 °C. Sulfuric acid is less resistant to temperature change than water. Ethyl alcohol likely exhibits more hydrogen bonding than water. More heat is required to raise the temperature of 1 g of benzene 1 °C than to raise the temperature of 1 g of water 1 °C. Water has a high specific heat due to the hydrogen bonding between water molecules. Benzene is more resistant to temperature change than sulfuric acid. Water is less resistant to temperature change than ethyl alcohol.