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A 250.0 g puck is sliding across a smooth ice surface (μ = 0.019) and slows down from 25.120 m/s to 24.003 m/s within 73.7 m. Calculate: a) the net force acting on the puck during the acceleration. b) the time this force acted on the puck.
What is the pH at the equivalence point when a 1.24 gram sample of C6H5COOH (Ka=6.6X10^-5, MM=121) are titrated with 0.180M LiOH? First find the volume of LiOH required to neutralize the acid and then assume that this volume is the volum of the so..
What do you think is the difference between a theory and a hypothesis?
Exactly 37.2mL of hydrogen is collected over water at 29 degrees C and 745 torr. Explain the vapor pressure of water at 29 degrees C is 30 torr.
Melting point of a mixture A + B was measured to be higher than any of the melting points of pure individual components A and B. When this might be the case
in a collision of sufficient force automobile air bags respond by electrically triggering the explosive decomposition
Calculate the energy per mL if the energy per gram for Methanol (MW = 32g) is 0.83 kcal/gram and for Ethane MW
a mixture of methane ch4 and ethane c2h6 is stored in a container at 294 mmhg. the gases are burned in air to form co2
Explain what is the condensed electron configuration of Pb+2. Take out of the configuration. Is it [Xe] 4f14 5d10 or do [Xe]6s2 4f14 5d10?
How many milliliters of 6 M HNO3 would you add to 300 mL of the buffers solution to change the pH from 5.09 to 5.03?
Describe Newman projection. Experiments have shown that for 1,2-dichloroethane, ClCH2CH2Cl, in carbon tetrachloride solution at 25C, 70% of the molecules are in the anti and 30% are in the gauche conformation
What is the balanced chemical equation for the reaction used to calculate ΔH°f of CaCO3(s)? If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation (s), (l), or (g) for soli..
The bond length of 13 Na 19F is 192.6 pm. calculate the value of B and the spacing between lines in the pure rotational spectrum of this molecule in unit of s^-1
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