Air is about 78% nitrogen gas (n2) by mass. The molar mass of nitrogen gas is 28. 0 g/mol. A 100. 0-g sample of air contains how many moles of nitrogen? 2. 8 3. 6 28 78.

The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). one cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?

Its unlawful in the state of florida for any person to operate a motor vehicle unless each passenger of the vehicle under age of

What are the five categories of my plate