Heat must be removed to cool and freeze the water
An ice cube tray holds 515 g water. If the water initially has a temperature of 21°C, how many kilojoules of heat must be removed to cool and freeze the water at 0°C?
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An unknown salt is either NaF, NaCl or NaOCl.When 0.050 mol of the salt is dissolved in water for form 0.500 L of solution, the pH of the solution is 8.08. What is the identity of the salt?
The simplest formula of a substance is found to be CH2O, and its approximate molar mass is found by experiment to be 93 g•mol-1. What is its exact molar mass?
An electron experiences a magnetic force with a magnitude of 4.40×10-15 N when moving at an angle of 56.0^circ with respect to a magnetic field with a magnitude of 3.00×10-3 T
A gaseous mixture of and contains 34.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 305 ?
Dissolved .31 grams of KHP in 25 ml of water and it required 15.5ml of NaOH to reach end of titration, how many moles of KHP were originally present before the addition of the NaOH?
The leathal inhalation does of sarin for a 200 pound person has been determined to be .0015mg. Determine the LD50 of Sarin that researchers used to calculate the leathal inhalation dose?
A steel tape is used to measure a distance of 20 m at a 10 0C. Assuming that the tape will measure the true distance when the temperature is 20 0C.
A company has two buildings that are 50 meters apart. Between the buildings is private land owned by the company. A large walk-through tunnel connects the two buildings. In one building is a collection of 30 computer workstations, and in the o
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Respond this discussion visiting the websites they shared and offering additional examples of EBP or alternative views/interpretations
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Potassium has which of the following effects? Need Assignment Help? Group of answer choices lowers heart rate lowers LDL lowers blood pressure lowers blood sug