The answer to this ? is true
Answer:
Four Ca²⁺ and eight Cl⁻ ions.
Explanation:
If
0.20 mol·L⁻¹ NaCl = 8Na⁺ + 8Cl⁻
Then
0.10 mol·L⁻¹ NaCl = 4Na⁺ + 4Cl⁻
And
0.10 mol·L⁻¹ CaCl₂ = 4Ca²⁺ + 8Cl⁻
The square will contain 4 Ca²⁺ ions and 8 Cl⁻ ions.
It should resemble the diagram below
Solution
Given mass of FeBr2 = 85.5 g
Molar mass of FeBr2 = 215.65
No. of Moles of FeBr2 = Given Mass / Molar mass = 85.5 / 215.65
No. of Moles = 0.3964
Given Volume is 450 mL i.e. 0.450 L
Now Concentration = 0.3964/0.450
Hence Concentration = 0.881 mol/L
There are 1,000m is 1k. So just move the decimal one position right. 127.56m
There are 10,000cm in 1k. Move the decimal two positions right. 1275.6cm
A wax candle burns while in a sealed jar