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Consider the skier on a slope with an tilting angle of 33o. Her mass including equipment is 79.4 kg. What is her acceleration in unit of m/s2 if friction coefficient between her and the slope is 0 ? Please use g=10m/s2.
Explain what is the boiling point of toluene at 600mmHg. Define what are the colors of CoCl2 and CoCl2 . 6H2O
The U.S. Navy has a system for communicating with submerged submarines. The system uses radio waves with a frequency of 76 s-1. What is the wavelength of this radiation in meters?
Which of the following pairs has about the same atomic radius?
If 100.0 grams of copper (Cu) completely reacts with 25.0 grams of oxygen, how much copper(II) oxide (CuO) will form from 140.0 grams of copper and excess oxygen?
A 29.7 g mixture of the compounds magnesium oxide and potassium chloride is 57.7 % by mass magnesium oxide. The compound potassium chloride is 47.6 % by mass chlorine. Calculate the mass (g) of potassium in the mixture.
If there are 1.8 million people served by this water and each person uses 750 L of water a day, how many kilograms of sodium hypochlorite must be added to the water supply each week to maintain the 1.00ppm chloride level
How many moles of nitrogen are required to fill a 3.50 L tank at 25.0 oC to a final pressure of 8.74 atm
question what is the hydronium ion concentration and the ph of a solution formed when 30ml of 0.30m hno3 is titrated
For the cell reaction: Cu(s) + 2Fe3+ ? 2Fe2+ + Cu2+ Ecell° = 0.33 V What is the value of the equilibrium constant at 25°C for the cell reaction
an equilibrium mixture of o2 so2 and so3 contains equal concentration of so2 and so3. calculate the concentration of o2
Calculate the effective radiation dosage (in Sieverts) for a 85-kg person who is exposed to 7.3 × 109 particles of alpha radiation. Assume that 85% of the radiation is absorbed
The frequency of the absorption from the ground to the excited state is 2885 cm-1. What is the population ratio when temperature goes up to 50 oC
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