Calculate no of moles in 42g of carbon ?

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.