It's the law! Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants.
Answer:
a) 6,7x10⁻⁴M/s
b) 8,0x10⁻⁴M/s
Explanation:
a) You can determine the average rate of descomposition calculating the ratio of change of concentration to change of time.
For the entire experiment:
t=0,00→ 0,0100M
t=10,00→0,0033M
= 6,7x10⁻⁴M/s
b) Between 2,00 and 4,00 seconds:
t=2,00→ 0,0071M
t=4,00→0,0055M
= 8,0x10⁻⁴M/s
I hope it helps!
Answer: c.
Electrons are transferred → Ions form → Ions are attracted to each other
have a great day
Explanation:
Answer:
The answer to your question is 177.8 g of NaOH
Explanation:
Balanced chemical reaction
2 Na + 2 H₂O ⇒ 2 NaOH + H₂
Data
Grams of H₂ = ?
Mass of Na = 120 g
Mass of H₂O = 80
Process
1.- Calculate the limiting reactant
Molar mass of Na = 2 x 23 = 46 g
Molar mass of H₂O = 2 x 18 = 36 g
Theoretical proportion Na/H₂O = 46/36 = 1.28
Experimental proportion Na/H₂O = 120/80 = 1.5
As the experimental proportion increases, we conclude that the limiting reactant is the water.
2.- Calculate the mass of hydrogen
Molar mass of NaOH = 2[23 + 16 + 1] = 80 g
36 g of H₂O ------------------ 80 g of NaOH
80 g of H₂O ----------------- x
x = (80 x 80) / 36
x = 6400 / 36
x = 177.8 g of NaOH