B. HNO3 because it is copper and can not move the place of hydrogen's atom from the acid
Increase the wheel circumference, adjust the seat for different weight distribution and lubricate the bike chain regularly.
Answer:
The SI unit for specific enthalpy is joule per kilogram. It can be expressed in other specific quantities by h = u + pv, where u is the specific internal energy, p is the pressure, and v is specific volume, which is equal to 1ρ, where ρ is the density.
Explanation:
The area is 23x20 which = 460 sq ft.
If each sq foot gets 1250 flakes per min, it gets 75,000 in an hour.
The whole lawn gets 34,500,000 flakes in one hour, which would weigh 75,900,000 mg.
This equals 75.9 kg