Answer:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
"chlorine acts as a catalyst promoting the breakdown of ozone"
Explanation:
your welcome!
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
Answer:
Ba has the largest atom size
Answer:
float
Explanation:
density= mass/ volume (kg/m^3)
1.59 kg/0.197 m^3
=8.07 kg/m^3
density of H2O= 1000 kg/m3
since density(block)<density(H2O), the block will float
(can also be done in g/cm^3)
1590 g/ (1.97*10^5 cm3)= 0.00807 g/cm^3 < 1 g/cm^3 (h2O)