Stoichiometry And Chemical Reactions Review

CH30S - Stoichiometry and Chemical Reactions Review
1. What is a cation? Give an example.
2. Where are the nonmetals located on the periodic table?
3. Fill in the chart.
Symbol |Name |# of p+ |# of no |# of e- |atomic # |atomic mass | |  |aluminum ion |  |  |  |  |  | |O2- |  |  |  |  |  |  | |  |  |27 |  |25 |  |  | |  |  |  |  |10 |9 |  | | |mercury |  |  |  |  |  | |Name the following compounds.
a) Na2SO4   b) N2O4   c) MgCl2   d) KH2PO4   e) SiF4
f) HNO2   g) Fe(NO3)3   h) NO2   i) MnCrO4   j) Co3(PO4)2
4. Write the formula for the following compounds.
a) carbonic acid   b) barium chlorate   c) tin (IV) nitride   d) hydrochloric acid
e) cobalt (I) hydride   f) nitrogen triiodide   g) sulfurhexachloride   h) silver carbonate
5. State whether each of the compounds listed in #5 are molecular (covalently bonded) or ionic.
6. Name five diatomic molecules.
7. How many atoms are in 0.455 moles of lead?
8. Find the number of moles in 1.33 x 1021 molecules of oxygen.
9. What is the mass of 1 molecule of carbon tetrachloride?
10. How many moles are in 14.22 grams of iron (III)oxide?
11. What is the volume (in L) of 3.72 moles of hydrogen gas at STP?
12. What is the mass of 370 L of nitrogen gas at STP?
13. What is the density of methane (CH4, natural gas) at STP?
14. Which compound contains the most copper, by weight: CuO, CuS, or Cu2S or Cu3PO4?
15. A compound is found to be 53.0% aluminum and 47.0% oxygen. Find its empirical formula.
16. A 1.338gram sample of a compound contains 0.366 grams of Na and 0.220 grams of N. The rest is oxygen. Find the empirical formula.
17. Find the molar masses of the compounds in questions #4 f-j.
18. Vitamin C is an organic compound which contains carbon, hydrogen, and oxygen. Analysis of a sample shows that it is 40.9 % C, 4.58 % H, and 54.5 % O. Its molar mass is about 180 g/mole. Find the molecularformula.
19. What is the mass, in kg, of 5.00 x 1026 atoms of lead?
20. How many atoms of carbon has a man given his fianceé if the engagement ring has a 0.500 carat diamond? There are 200.0 mg in a carat.
21. potassium chloride + silver nitrate ( potassium nitrate + silver chloride
22. aluminum hydroxide + sodium nitrate ( aluminum nitrate + sodium hydroxide
23. iron metal +copper(II) sulfate ( iron(II) sulfate + copper metal
24. aluminum metal + copper(II) chloride ( aluminum chloride + copper metal
25. potassium bromide ( potassium metal + bromine
Complete the word equation for the following chemical equations. Then below the word equation, write the balanced chemical equation. Indicate the type of reaction by classifying each reaction as single replacement(SR), double replacement (DR), decomposition (D), synthesis (S), or combustion (C).
26. aluminum sulfate + calcium phosphate ( _______________________________
27. magnesium chloride + silver nitrate ( __________________________________
28. magnesium chloride + silver nitrate ( __________________________________
29. sodium chlorate ( ________________________________________________
30.hydrogen gas + oxygen gas ( _______________________________________
31. zinc metal + copper(II) nitrate ( ______________________________________
32. 4 Al + 3 O2 --> 2 Al2O3
a) How many moles of Al2O3 will be formed from 17 moles of Al?
b) How many grams of oxygen are needed to burn 42.0 g of Al?
33. Magnesium reacts with hydrochloric acid (HCl) to produce magnesium chlorideand hydrogen gas.
a) Write the balanced equation for this reaction.
b) If you start with 25.0 g of magnesium, how many grams of hydrogen gas will form?
c) If you start with 140.0 g of HCl, how many moles of magnesium will react?
34. 4 NH3 + 5 O2 --> 4 NO + 6 H2O
a) If you start with 80.0 g of O2 and 70.0 g of NH3, how many grams of NO will you produce?
b)...