Answer:
sodium
Explanation:
sodium is the second most reactive. Magnesium being the least reactive
Answer:
Alkanes naturally occur in crude oil and are a major component of many fuels and solvents derived from petroleum
A homogeneous mixture, the substances are uniformly distributed throughout the mixture
Answer: The partial pressure of oxygen in the mixture is 321 mm Hg
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
Given : 
= total pressure of gases = 752 mm Hg
= partial pressure of Helium = 234 mm Hg
= partial pressure of nitrogen = 197 mm Hg
= partial pressure of oxygen = ?
Putting in the values we get:
The partial pressure of oxygen in the mixture is 321 mm Hg
