Answer:
Molarity of HCl = 0.19 M
Explanation:
Moles of
:-
Mass = 0.246 g
Molar mass of
= 105.988 g/mol
The formula for the calculation of moles is shown below:
Thus,

According to the given reaction:-

1 mole of
react with 2 moles of HCl
0.002321 mole of
react with 2*0.002321 moles of HCl
Moles of HCl = 0.004642 moles
Given that volume = 24.3 mL
Also,
So, Volume = 24.3 / 1000 L = 0.0243 L
Considering:
<u>Molarity of HCl = 0.19 M
</u>
<u></u>
Answer is (2) - hydrogen carbonate
<em>Explanation:</em>
NaHCO₃ is an ionic compound which is made from Na⁺ and HCO₃⁻ ions. The decomposition is
NaHCO₃ → Na⁺ + HCO₃⁻
Among the resulted ions, Na⁺ is a monatomic ion while HCO₃⁻ is a polyatomic ion.
<em>Polyatomic ions mean ions which are made of two or more different atoms.</em>
HCO₃⁻ is made from 3 atoms as H, C and O. The name of HCO₃⁻ ion is bicarbonate or hydrogen carbonate.
<u>The given reaction is:</u>
F2 + ClO2 → 2FClO2
Rate = k[F2][ClO2]
<u>Explanation:</u>
The possible mechanism for this reaction can be broken down into two steps with the slow step being the rate determining step
Step 1: F2 + ClO2 → FClO2 + F ----------- Slow
Step 2: F + ClO2 → FClO2 ----------- Fast
-----------------------------------------------------------
Overall: F2 + 2ClO2 → 2FClO2
Rate = k[F2][ClO2]
Answer: B.)
Explanation: Heat flows from pan to sounroundings