Answer:
9 grams of methane contains a greater number of hydrogen atoms (therefore molecules) than 10 grams of ammonia
Explanation:
The number of atoms of hydrogen per molecule of ammonia = 3 atoms of hydrogen
The number of atoms of hydrogen per molecule of methane = 4 atoms of hydrogen
The molar mass of methane = 16.04 g/mol
The molar mass of ammonia = 17.031 g/mol
The number of moles of methane in 9 grams of methane = 9/16.04 ≈ 0.561 moles
The number of hydrogen atoms in 0.561 moles of methane = 0.561 × 6.02 × 10²³ × 3 ≈ 1.351 × 10²⁴ atoms of hydrogen
The number of moles of ammonia in 10 grams of ammonia = 10/17.031 ≈ 0.5872 moles
The number of hydrogen atoms in 0.5782 moles of ammonia = 0.5872 × 6.02 × 10²³ × 3 ≈ 1.06 × 10²⁴ atoms of hydrogen
Therefore, 9 grams of methane contains a greater number of hydrogen atoms than 10 grams of ammonia.
Answer:
lawyer will be late for at least 17 days
Explanation:
given,
average time for a one way trip = 24 minutes
standard deviation = 3.8 minute
P(of late) = P(x>20 min)
= 
= 0.5 + 0.3531
= 0.8531 = 85.31 %
days lawyer would be late for work
= n p = 20 × 0.8531 = 17.062 days
hence, lawyer will be late for at least 17 days during a period of 20 work day.
Answer:
Explanation:
Canada is the largest foreign supplier of crude oil (25% of oil imports) and natural gas to the United States. In short, this energy relationship has enhanced U.S. energy security and provided Canada with a steady demand for its energy exports.
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Answer:
123 years to reach 2 billion
Explanation:
it is estimated that the population of the world one billion for the first time in 1804. it would be another 123 years to reach two billion in 1927. but it took only 33 years to rise by another billion people, 3 million in 1960.
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