デジタル形式で段階的に解決 ありがとう!! SOLVE STEP BY STEP IN DIGITAL FORMAT Structure of Metal Materials: 9. We have a hypothetical element "Q" of atomic weight 64.09 that has an FCC type structure and an experimental density of 8.41 g/cm^3 has been determined. Calculate (a) The approximate atomic radius for "Q" and (b) Why is the calculation only approximate? Explain and justify your answer.

1. Suppose a middle school class is building a simplified model of a hydrogen atom. They plan to use a styrofoam ball with a 2-centimetre diameter for the nucleus. a) What is the scale of their model? Write a ratio of the model nucleus diameter to the actual nucleus diameter. Do not simplify the ratio. Diameter of an actual hydrogen nucleus = 1.75 * 10^-15 m

(a) If the average molecular mass of compounds in food is50.0 g, how many molecules are there in 1.00 kg of food? (b)How many ion pairs are created in 1.00 kg of food, if it isexposed to 1000 Sv and it takes 32.0 eV to create an ionpair? (c) Find the ratio of ion pairs to molecules. (d) If theseion pairs recombine into a distribution of 2000 newcompounds, how many parts per billion is each?

Using the ideal gas equation, calculate the density of radon gas at 8.0 K and 9.0 atm, Give your answer in g/L and do not use scientific notation.

14) What is the mass-defect of Nickel, N-62 (atomic number = 28, atomic weight = 61.928345) Group of answer choices A)0.461u B)0.794u C)0.585u D)0.612u E)0.912u

12.3q5

A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67 10-27 kg.Densities of Some Common Substances at Standard Temperature (0°C) and Pressure (Atmospheric) Substance ρ (kg/m3) Substance ρ (kg/m3) Air 1.29 Iron 7.86 ✕ 103 Air (at 20°C andatmospheric pressure) 1.20 Lead 11.3 ✕ 103 Aluminum 2.70 ✕ 103 Mercury 13.6 ✕ 103 Benzene 0.879 ✕ 103 Nitrogen gas 1.25 Brass 8.4 ✕ 103 Oak 0.710 ✕ 103 Copper 8.92 ✕ 103 Osmium 22.6 ✕ 103 Ethyl alcohol 0.806 ✕ 103 Oxygen gas 1.43 Fresh water 1.00 ✕ 103 Pine 0.373 ✕ 103 Glycerin 1.26 ✕ 103 Platinum 21.4 ✕ 103 Gold 19.3 ✕ 103 Seawater 1.03 ✕ 103 Helium gas 1.79 ✕ 10−1 Silver 10.5 ✕ 103 Hydrogen gas 8.99 ✕ 10−2 Tin 7.30 ✕ 103 Ice 0.917 ✕ 103 Uranium 19.1 ✕ 103 (a) Determine the density of the proton.kg/m3

3.The running engine of an automobile produces carbon monoxide (CO), a toxic gas, at the rate of about 188 g CO per hour. A car is left idling in a poorly ventilated garage that is 6.0 m long, 4.0 m wide, and 2.2 m high at 20°C. (a) Calculate the rate of CO production in mol/min. (b) How long would it take to build up a lethal concentration of CO of 1000 ppmv (parts per million by volume)?

7. If the radius of the nucleus R = 12x 10^-13 cm, and known it is 1 fermi = 10^-13 cm, the nuclear radius of the 12C carbon atom is  a. 1.2 fermi  b.  2.7 fermi  c.  3.6 fermi  d.  1.7 fermi  e.  2.2 fermi

If the atomic radius for Pb= 0.175nm, find the volumeof the unit cell.