Explain the proper uses of shop equipment. (explain to me how to use 3 pieces of shop equipment.)
1 answer:
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Answer:
1.4 mL
Explanation:
Given that:
volume of alcohol = 500
Temperature change ΔT = (30° - 5°)C
=25° C
The increase in volume ΔV =
= 1.4 mL
Answer:
The theoretical density for Niobium is .
Explanation:
Formula used :
where,
= density of the unit cell
Z = number of atom in unit cell
M = atomic mass
= Avogadro's number
a = edge length of unit cell
We have :
Z = 2 (BCC)
M = 92.91 g/mol ( Niobium)
Atomic radius for niobium = r = 0.143 nm
Edge length of the unit cell = a
r = 0.866 a (BCC unit cell)
On substituting all the given values , we will get the value of 'a'.
The theoretical density for Niobium is .
Answer: The mass of the substance is 20 g
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
where,
n = moles of solute
= volume of solution in ml = 250 ml
moles of =
Now put all the given values in the formula of molality, we get
Therefore, the mass of the substance is 20 g