Answer: 1.49 moles of Nickel
Divide the given number of grams by 1mol of Nickel to get your answer.
Hope this helps!
Answer:
synthesis
Explanation:
I believe answer is d a synthesis reaction
Answer:
4.
Explanation:
I believe that #4 best shows the runoff in the system. We see 2/3 which is precipertation falling and 4 shows this water running off the mountains into the ocean.
Answer:
Percent yield = 89.1%
Explanation:
Based on the equation:
Cl₂ + 2KI → 2KCl + I₂
<em>1 mole of Cl₂ reacts with 2 moles of KI to produce to moles of KCl</em>
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To solve this quesiton we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of KCl and the mass:
<em>Moles Cl₂:</em>
8x10²⁵ molecules * (1mol / 6.022x10²³ molecules) = 133 moles
<em>Moles KI -Molar mass: 166.0028g/mol-</em>
25g * (1mol / 166.0028g) = 0.15 moles
Here, clarely, the KI is the limiting reactant
As 2 moles of KI produce 2 moles of KCl, the moles of KCl produced are 0.15 moles. The theoretical mass is:
0.15 moles * (74.5513g / mol) =
11.2g KCl
Percent yield is: Actual yield (10.0g) / Theoretical yield (11.2g) * 100
<h3>Percent yield = 89.1%</h3>
Answer is Atomic Number of Cu.
Explanation: For a unit cell, density can be written as
For a unit cell, Mass will be
where Z= Number of atoms
m = Mass of an atom
Mass of an atom can be calculated by,
Volume of a unit cell =
where a = edge length
Now, putting Mass and Volume of an atom in density, the equation becomes
For the calculation of Avagadro's number,
we can see from the equation, we need
1. Molar mass of atom
2. Density of unit cell
3. Edge length of the unit cell
4. Number of atoms occupying one unit cell.
Hence, for the above question there is no need for the Atomic Number of atom.