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Explain Radio waves travel at the speed of light, 3.00x10^8 m/s. if you were to transmit a question to an astronaut on the moon, which is 239,000 miles from earth, Define the minimum time that you would have to wait to receive a reply?
How many grams of solid acetate (82.0 g/mole) should be added to 1.50 L of a 0.287 M acetic acid solution to prepare a buffer with a pH of 4.140. Grams of sodium acetate
what is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 torr at 25c vapor
Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution
The capacity of batteries such as the typical AA alkaline battery is expressed in units of milliamp-hours (mAh). An "AA" alkaline battery yields a nominal capacity of 2850 mAh.
A student weighed 0.4521 g of sodium oxalate and dissolved in 50 mL of distilled water and 10 mL of 4.0M H2SO4. The solution was titrated with 58 mL of KMnO4, what was the concentration of KMnO4.
How are moles, masses, and volumes of gases calculated from one another for a gas at STP
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change.
A high pressure natural gas tank is at 3600 psi. The tank contains 4.98 mol of methane (CH4) and 0.66 mol of ethane (C2H6). What is the partial pressure
Draw CI by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electron.
a 0.250- sample of a magnesium-aluminum alloy dissolves completely in an excess of . when the liberated is collected
The pKa values for some weak acids are given Which is the strongest acid of the group. A. pKa=2.5 B. pKa=7 C. pKa=9.2 D. pKa values have nothing to do with acid strength
Products is second order with a rate constant of 0.469 M-1s-1. If the initial concentration of A is 0.159 M, how many seconds would it take for the concentration of A to decrease to 5.12 * 10-3 mol/L?
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