How many kilojoules of heat must be removed
An ice cube tray holds 455 g water. If the water initially has a temperature of 33°C, how many kilojoules of heat must be removed to cool and freeze the water at 0°C?
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Explain the interaction effect between nitrogen and phosphorus and Nitrogen and potassium. Describe the dynamics amoung various potassium forms in soil and discuss the fates of potassium added to the soil via organic matter.
What is the biological importance of OH- (hydroxide), what are the daily minimum requirements, what are the effects of deficiency and excess.
Calculate the amount of Zn metal in grams consumed in the reaction. (Vapour pressure of water at 25C = 23.8 mmHg).
An astronaut drops an object from rest (relative to the planet) on a planet alpha (having the same radius as of earth) from an altitude of one radius above the surface. When the object hits the surface its speed is 4.09 times what it would be
Exactly 5.00 mL of 1x10^-3 M F- standard was added to the 50.0mL solution and the potential on the fluoride ISE became +68mV. Calculate the fluoride content in the soil as %F-.
Boom AB is held in the position shown by three cables. Knowing that the tensions in cables AC and AD are 4 kN and 5.2 kN, respectively.
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