{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Final Practice 159

# Final Practice 159 - 1 Which of the following can hydrogen...

This preview shows pages 1–3. Sign up to view the full content.

1. Which of the following can hydrogen bond with water but not with itself? X. HF Y. NH 3 Z. H 3 COCH 3 A. X only E. X and Z B. Y only F. Y and Z C. Z only G. X, Y, and Z D. X and Y H. none of them 2. Perform the indicated operations and identify the answer with the correct number of significant figures: (33.6567 – 33.575) / (56.1443)(3.6677 x 10 –2 ). A. 0.04 E. 0.03970 B. 0.040 F. 0.03968 C. 0.0400 G. 0.039680 D. 0.0397 H. 0.039676 3. Which of the following is the empirical formula of a compound that is 76.57% C and 6.43% H by mass? 4. The element antimony has an atomic mass of 121.757 amu and only two naturally occurring isotopes. One isotope has an abundance of 57.300% and has an isotopic mass of 120.904 amu. Based on this data, what is the mass of the other isotope? 5. Consider two elements X and Y. The compound XY 2 has equal masses of X and Y. The ratio of the mass of Y to the mass of X in the compound X 2 Y 5 is 6. The number of atoms in 1.000 mol of aluminum sulfate is A. 6.022 x 10 23 F. 4.818 x 10 24 B. 1.204 x 10 24 G. 6.624 x 10 24 C. 3.011 x 10 24 H. 7.829 x 10 24 D. 3.613 x 10 24 I. 8.431 x 10 24 E. 1.807 x 10 24 J. 1.024 x 10 25

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
7. An aqueous solution that is 65.0 % H 2 SO 4 by mass has a density of 1.55 g/mL. What volume of this solution contains 2.00 moles of H 2 SO 4 ? 8. Magnesium nitride can be formed by the reaction of magnesium metal with nitrogen gas. Which of the following statements is true when 35.00 g of magnesium and 15.00 g of nitrogen gas are mixed and the reaction is allowed to proceed to completion? W. 50.00 grams of magnesium nitride are formed. X. 1.55 grams of N 2 (g) are left over. Y. 13.45 grams of N 2 (g) are left over. Z. Magnesium is in excess.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}