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A 22 kg child slides down a 2.5-m -high playground slide. She starts from rest, and her speed at the bottom is 1.0 m/s . What is the change in the thermal energy of the slide and the seat of her pants?
a solution is prepared by adding enough water to 387 g of CsCl to form 1 liter of solution. What is the mass of the solution? the density of the solution is 1.384 g/mL.
Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density of 1.0432 g/mL at 20 degrees Celsius. What is the concentration of this solution in the following units
consider the composition of dry air in 0 humidity is just about 21 o2 78 n2 and 1 argon by moles. compute the density
Write a line angle formula of each constitutional isomer of dimethylcyclohexane. Write the IUPAC name of each isomer.
What is the new pressure, in atm,when the air is placed in tanks that have the following volumes, if there is no change in temperature and amount of gas?
calculate the emf of a cell operating with the followingreaction at 25oc in which mno4- 0.010 m br- 0.010 m mn2 0.15
A chemist found that a reaction did not take place under any set of conditions. If the chemist added a catalyst, would the reaction then occur?
Question- Draw a complete curved-arrow mechanism for the nitration of a phenol to yield p-nitrophenol and o-nitrophenol.
Why are the steps of scientific methods are not always used in the same order in every investigation
Calculate the pH of a solution prepared by mixing 0.0800 mol of chloroacetic acid plus 0.0400 mol of sodium chloroacetate in 1.04 L of water. (pKa of chloroacetic acid = 2.865.)
0.4 grams sample of primary standard Na2CO3 treated with 45mL of dilute perchloric acid. Solution boiled to remove CO2 and then the excess HClO4 back titrated with 13mL of dilute NaOH
A 1- flask is filled with 1.20 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.45 .
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