Problem 16.49 You draw 250 mL of 14 ∘C water from the tap and pop it into a 900-W microwave oven to heat for tea. |
Part A How long should you microwave the water so it just reaches the boiling point? Express your answer with the appropriate units.
SubmitMy AnswersGive Up Incorrect; Try Again; 3 attempts remaining |
Problem 16.49 You draw 250 mL of 14 ∘C water from the tap and pop it...
Problem 4 You draw 10°C water from the tap and pop it into a cubic container to heat for tea. When the cube of 5.6 cm on a side is filled up to the brim you place it in a microwave beam having Eo = 15 kV/m. The water absorbs 75% of the incident energy. How long in seconds) should you microwave the water so it just reaches the boiling point? Make some plausible assumptions about the process to make...
Part C a solution that is 4.0×10−2 M in HClO4 and 5.3×10−2 M in HCl Express your answer to two decimal places. pH = SubmitMy AnswersGive Up Incorrect; Try Again; 5 attempts remaining; no points deducted Part D a solution that is 1.11% HCl by mass (Assume a density of 1.01 g/mL for the solution.) Express your answer to three decimal places. pH =
Using Microwave Radiation to Heat Coffee (expanded) Microwave ovens use microwave radiation to heat food. The microwaves are absorbed by the water molecules in the food, which is transferred to other components of the food. As the water becomes hotter, so does the food. Part A Suppose that the microwave radiation has a wavelength of 12.4 cm . How many photons are required to heat 215 mL of coffee from 25.0 ∘C to 64.6 ∘C? The coffee has a density...
The heat of fusion for water to "Cis Determine the number of grams of ice at 0°Cthat must be added to a cup with 230 poftea at 50 "Cto cool the tea to 20 " L-335x10J/kg The specific heat of water is e4180 J/ky"C Express your answer in grams. 0 AED RO? 5.4 Submit Pro Answers Rest Answer X Incorrect; Try Again: 3 attempts remaining
At the airport, you pull a 18 kg suitcase across the floor with a strap that is at an angle of 40 ∘ above the horizontal. Part A Find the normal force. Express your answer using two significant figures. N = _______ N SubmitMy AnswersGive Up Incorrect; One attempt remaining; Try Again Part B Find the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between the suitcase and the...
K12 Problem 15.23 ③ 4 of 12 Review Suppose you pour water into a container until it reaches a depth of 10 cm. Next, you carefully pour in a 8.5 cm thickness of olive oil so that it floats on top of the water. Part A What is the pressure at the bottom of the container? Express your answer using two significant figures. VO ΑΣΦ Submit Previous Answers Request Answer * Incorrect; Try Again; 5 attempts remaining
*PLEASE SHOW ALL WORK AND STEP BY STEP SOLUTION Problem Set 12.3 Problem 12.47 < 4014 Review Constants Periodic Table Part A 26 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 23 C in an insulated cup What will the new water temperature be? Express your answer using two significant figures. o C Submit Prevlous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining
Part A Describe how you would make 400.0 mL of a 0.400 M NaOH solution from a 20.0 M stook NaOHI solution. Express your answer with the appropriate units Dilute Value Units of the 20.0 M stock solution to a final volume of 400.0 mL Part A CH3NH2 Express your answer as a chemical expression. Submit Previous Answers Request Answer Incorrect; Try Again; 4 attempts remaining Part B C,HsN Express your answer as a chemical expression. 圏? Part C CI...
Part B A solution of water (kr = 1.86°C/m) and glucose freezes at - 415°C What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 °C Express your answer to three significant figures and include the appropriate units. View Available Hint(s) m= 2.34 m Submit Previous Answers X Incorrect: Try Again: 5 attempts remaining Part A solution of water (K = 0.512 °C/m) and glucose boils at 101.56 °C. What...
You want to use your microwave oven to heat 0.30 L of water from room temperature (about 25 ?C)to boiling. The water is in a cup that has a radius of 40 mm , and you want the water to reach its boiling point in 5.00 min . Assume that the water heats uniformly and all the microwaves come in from the top and are completely absorbed by the water. please answer part c too Part C What is the...