I NEED HELP WITH THIS CHEMISTRY QUESTION PLS
1 answer:
Answer:
Iron, according to:
Explanation:
Hi there!
In this case, according to the law of conservation of mass, which states that matter cannot be neither created nor destroyed, it is possible for us to figure out the missing element in the reaction by taking into account this is a single displacement reaction in which Al goes with NO3 to produce the Al(NO3)3, and therefore the other element would be iron (Fe) as can be seen on the following chemical reaction:
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<u>Answer:</u>
<u>For a:</u> The edge length of the crystal is 533.5 pm
<u>For b:</u> The atomic radius of potassium is 231.01 pm
<u>Explanation:</u>
- <u>For a:</u>
To calculate the lattice parameter or edge length of the crystal, we use the equation:
where,
= density =
Z = number of atom in unit cell = 2 (BCC)
M = atomic mass of metal = 39.09 g/mol
= Avogadro's number =
a = edge length of unit cell = ?
Putting values in above equation, we get:
<u>Conversion factor:</u>
Hence, the edge length of the crystal is 533.5 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 = 533.5 pm
Putting values in above equation, we get:
Hence, the atomic radius of potassium is 231.01 pm