Chapter 2, Problem 2.6E

What is the number of atoms of nitrogen are present in 6.19 g of each of the following?

Choose the correct statements for a single molecule of the compound NH,N03: I. There are 2 nitrogen atoms II. The ratio of Hydrogen atoms : Oxygen atoms is 1: 3 III. There are twice as many Nitrogen atoms as hydrogen atoms IV. The ratio of Nitrogen atoms : Oxygen atoms is 2:3 Select one: O a. II, III and IV O b. I and I| c. I and IV d. I, III and IV e. Il and III

18. Element X reacts with chlorine to form a compound with the formula of X2Cl3. This compound contains 25% by mass of chlorine. What is the relative atomic mass of the element X?(Relative atomic mass: Cl = 35.5) A. 39.9 B. 79.9 C. 106.5 D. 159.8 20.7 g of lead metal reacts with excess oxygen to form lead(II) oxide on strong heating. What is the mass of lead(II) oxide formed?(Relative atomic masses: O = 16.0, Pb = 207.2)11.1 g, 22.3 g, 33.4 g, 44.6g 20. Phosphorus reacts with iodine to produce phosphorus(III) iodide: 22.3 g 33.4 g 44.6 g P4 + 6I2 → 4PI3What is the minimum mass of iodine required to produce 1 g of phosphorus(III) iodide when the phosphorus is in excess?((Relative atomic mass: I = 126.9; molar mass of phosphorus(III) iodide = 411.7 g) A. 0.462 g B. 0.925 g C. 2.466 g D. 3.700 g