That means that the amount of energy can only be certain numbers, as if
energy came in tiny packets, and the in-between amounts don't exist.
Another example of a measurement in nature that is quantized is
electric charge.
Answer:
0.040M RbOH
Explanation:
The reaction of Rb with water is:
2Rb + 2H₂O → 2RbOH + H₂
As 2 moles of rubidium produce 2 moles of rubidium hydroxide, we need to find the moles of rubidium added. With these moles and the volume we can find molar concentration of RbOH as follows:
<em>Moles Rb = Moles RbOH -Molar mass Rb = 85.4678g)</em>
8.5g * (1mol / 85.4678g) = 0.099 moles RbOH
As 1dm³ = 1L, the volume in liters is 2.5L
That means molarity is:
0.099 moles RbOH / 2.5L =
<h3>0.040M RbOH</h3>
Answer:
mass = 6.56 grams
Explanation:
No of molecules = No of moles × Avogadro's constant
Similarly, number of moles = mass/ molar mass
∴
mass = 6.56 grams
Answer:
A base is a substance that can donate a hydroxide ion.
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Answer:
10.5 g
Explanation:
Step 1: Given data
- Molar concentration of the solution (C): 0.243 M
- Volume of solution (V): 0.580 L
Step 2: Calculate the moles of solute (n)
Molarity is equal to the moles of solute divided by the liters of solution.
M = n/V
n = M × V
n = 0.243 mol/L × 0.580 L = 0.141 mol
Step 3: Calculate the mass corresponding to 0.141 moles of KCl
The molar mass of KCl is 74.55 g/mol.
0.141 mol × 74.55 g/mol = 10.5 g