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In some rural towns a loud whistle will announce noon. If you set your watch by this noon whistle and are 5.6 km away from the whistle when it blows, how do I find how far off will your watch be? (assume a speed of sound of 330m/s)
Galactose is concentrated in a cell by a transporter driven by ATP hydrolysis. What is the ratio of ADP to ATP required to maintain a galactose concentration gradient of 100,000:1
The values for nitrous acid (HNO2) and hypochlorous (HClO) acid are 4.5 x 10^-4 and 3.0 x 10^-8 , respectively. Which one would be more suitable for use in a solution buffered at pH = 7.0
a step by step answers for those Question please. Please be brief. What is the PH of a buffer prepared by combining 25mL of 0.1M nitrous acid with 25mL of 0.1M sodium nitrite?
Hypochlorous acid is a weak acid with pKa= 7.41 suppose a 45.00ml sample of 0.240 M HOCL solution is titrated with a 0.250 M standard KOH solution. what is the PH of the equivalence point
a 15.0-g sample of a hydrocarbon is placed in a balloon at 1.00 atm and 25degc and the volume of the balloon is 12.2 l.
Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.144oC.
Hypothetical metal M has a molecular weight 171 g/mol and crystallizes in a body-centered cubic array of atoms in which the length of the unit cell's edge is 547.3 pm
Calculate the ratio of the masses of the buffer components required to make the buffer. a buffer with pH = 9.00 = ?? NH4+/NH3.
calculate the inimum temperature at which this process will be spontaneous under standard conditions. Assume that Delta Ho and Delta So do not vary with temperature.
Question- A buffer is prepared by adding 30.0g of sodium acetate (CH3COONa) to 600mL of a 0.150M acetic acid (CH3COOH) solution. Determine the pH of the solution. Ka=1.8 x 10^-5
If a gas system at 25oC has a pressure of 23.0 atm, what pressure will the system change to if the temperature rises to 35.0oC?
If the reaction 4NH3 + 5O2 yeilds 4NO + 6H2O uses 824 g NH3 and excess oxygen, how many moles of NO are formed?
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