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Given a normal distribution with μ=100 and σ=10
a. What is the probability that X>95??
?(Round four decimal places.)
b. What is the probability that X<90??
(four decimal places as? needed.)
c. What is the probability that X<80 or X>105??
?(four decimal places as? needed.)
d. 80?% of the values are between what two? X-values (symmetrically distributed around the? mean)?
80?% of the values are greater than ? and less than ?
?(two decimal places as? needed.)
Determine how much heat is evolved or absorbed when 30.0 of lithium iodide completely dissolves in water.
A 26.0-g sample of ice at -11.0°C is mixed with 123.0 g of water at 90.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
how many liters of the HCN solution must be added to the NaCN to prepare the buffer. Now add 1.60grams of NaOH (solid) to the buffer. What will be the new pH.
create a 6-step procedure to make 100 ml of a 0.10 m solution of sodium chlorate naclo3. also create a 7-step procedure
At retirement, you purchase an annuity with the money from your savings that will last for 14 years and earn a return of 5%.
IF a gas is compressed in a cylinder from a volume of 20 L to 2.0 L by a constant pressure of 10 atm. Compute the amount of work done on the system. (1 L*atm = 101.3 J)
At 20 degrees celsius, the vapor pressure of ethanol is 45 torr, and the vapor pressure of methanol is 92 torr. What is the vapor pressure at 20 degrees Celsius of a solution prepared by mixing 26 g methanol and 73 g ethanol?
what amount of methane gas is present in a sample that has a volume of 500mL at 35.o degrees celcius
Find the molar mass of the compound. The reezing point of benzene is 5.49 degree celcius.
A tank initially at a pressure of 6.70 atm contains 20.0 moles of oxygen gas at 25.0 degrees celsius. Its temperature is then increased to 45.0 degrees celsius
Calculate the Sb3+ ion concentration at equilibrium in a 0.10 M Sb3+ ion solution that has been buffered at pH 8.00
how much heat is required to raise the temperature of 50.0 grams of water from 55 degrees celcius? be sure to include
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