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What is the minimum speed for orbiting the earth in a close orbit? The maximum speed? What happens above this speed?
a box contains 126000 red marbles and 885000 yelllow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
In the Balmer-Rydberg equation, what value of is used to determine the wavelengths of the Balmer series?
Which of the following refers to particularly stable arrangements of amino acid residues in a protein that give rise to recurring patterns
If 4.49 g NaNO3 is dissolved in enough water to make 250 mL of solution, what is the molarity of the sodium nitrate solution
Question- Butane gas is compressed and used as a liquid fuel in disposable cigarette lighters and lightweight camping stoves. Suppose a lighter contains 3.84mL of butane (d=0.579g/mL). How many grams of oxygen are needed to burn the butane complete..
Mercury and Bromine will react with each other according to the reaction: Hg (l) + Br2 (l) ? HgBr2 (s) What mass of mercury (II) bromide can be produced from the reaction of 10.0 g Hg and 9.00 g Br2? How much of the excess reagent remains at the e..
Of all the machines tested, 5 experience malfunctions during the test. Compute the number of failures per hour and MTBF.
A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of 0.150 M acetic acid, CH3CO2H. What is the pH of the buffer?
Balance the following electrochemical equation for an acidic environment. HCl + Al3+ ? ClO41- + Al
a solution of ethanol c2h5oh in water is prepared by dissolving 90.0 ml of ethanol density 0.79 gcm3 in enough water
escalated the division between the Crown and the Colonists
fe 2hcl fecl2 h2 a piece of metallic iron 10 moles was dissolved in concentrated hydrochloric acid. the reaction
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