Physical Chemistry Answers

what volume of water should be added to 500 ml of 2N(f=0.98) NA2CO3 to make it exactly decinormal?

An infected person who takes no precautions has a 60% chance of infecting one other person per day. If an infected person wears a mask, then that person has a 5% chance of infecting one other person per day. If an infected person practices social distancing, then that person has a 20% chance of infecting one other person per day. If a person does both, then that person has a 1% chance of infecting one other person per day In this city, 30% of the population wear masks and 40% of the population practices social distancing. It is also found that mask-wearing and social distancing behaviours are not correlated. At the start of day 1, there are 100 infected people in the city. Using the information given, and assuming that infected people do not stop being infectious, estimate the number of infected people after 10 days.

When 1 mole of Zn metal is added to 2M HCl solution at 25 °C and 100 kPa pressure, the metal dissolves and hydrogen gas is evolved. At the same time, 152.3 kJ of heat energy are released. a. Calculate ∆V for the reaction

A mixture of ammonia isotopes containing 0.5 moles of NH2D and 2.0 moles of NHD2 is allowed to equilibrate, producing a mixture of NH3, NH2D, NHD2 and ND3

a. Ignoring the N atoms (because they are not exchanging), determine the most probable distribution once equilibrium is achieved.

What is the 31st ionization energy of Gallium?

Using the "equipartion" of energy concept, estimate the ideal gas $c_p$ (not $c_v$) in units of $k_B$ for "high-temperature" where all vibrational modes are activated. (if you calculate $c_p = 42k_B$, enter 42 as your answer)

The intensity distribution of solar radiation peaks at a wavelength of approximately 500 nm. Assuming the Sun radiates like a black body, calculate the flux of photons leaving the sun in W/m^2

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