When two your substances are combined so that each of the pure substances retains its own properties the result is a(n)?A. mixtu
1 answer:
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<u>Answer:</u>
<u>For a:</u> The edge length of the unit cell is 314 pm
<u>For b:</u> The radius of the molybdenum atom is 135.9 pm
<u>Explanation:</u>
- <u>For a:</u>
To calculate the edge length for given density of metal, we use the equation:
where,
= density =
Z = number of atom in unit cell = 2 (BCC)
M = atomic mass of metal (molybdenum) = 95.94 g/mol
= Avogadro's number =
a = edge length of unit cell =?
Putting values in above equation, we get:
Conversion factor used:
Hence, the edge length of the unit cell is 314 pm
- <u>For b:</u>
To calculate the edge length, we use the relation between the radius and edge length for BCC lattice:
where,
R = radius of the lattice = ?
a = edge length = 314 pm
Putting values in above equation, we get:
Hence, the radius of the molybdenum atom is 135.9 pm
Answer: Three things are missing:
i) Graph title.
ii) Label for the vertical axis.
iii) The scale and the units for the horizontal axis.
Justification:
1) Find the graph in the image attached.
2) What does the graph represent? You cannot tell because it does not show the tittle.
Since you are told in the statement that it is a temperature and volume graph, the appropiate title would be:
Temperature vs. Volume.
3) The vertical axis also must be properly labeled, including the units.
A good label for the vertical axis of this graph might be: Volume (cm³). It migh also be liters, gallons, or other volume unit.
4) Although the horizontal axis is labeled, it does not indicate the units and the scale. So, you know neither if the temperature shown is celsius, (°C), farenheti (°F), kelvin (K), or rankine (R) (those are the four major scales of temperature), nor how much each division represent (1, 5, 10, 10, 50, 100?)
