Answer:
Replacing the powdered lead oxide with large crystals
Explanation:
The large crystals have less surface area exposed to the other reagents than the powdered lead oxide. High surface area leads to a high rate of reaction thus the products are formed faster, while a low surface area leads to a lower rate of reaction since the reagent is less exposed to the other reagents.
Answer:
Calcium has an Atomic number of 20 and Atomic mass of 40.078 u
Hope this helps!
Answer:
Chemical equations need to be balanced so that they follow the law of conservation of mass.
It would be 1 or 2 because if the number is higher than 5 you need to round up , if its lower than 5 you need to round down.
M = 22.8 g
V = 14.7 mL
ρ - ?
ρ = m/V
ρ = 22.8/14.7 = 1.55 g/mL
