Indietro
Problema 39a
Balance the following equations. (a) The explosion of ammonium nitrate: NH4NO3 → N2 + O2 + H2O
Problema 39b
Balance the following equations. (b) The spoilage of wine into vinegar: C2H6O + O2 → C2H4O2 + H2O
Problema 39c
Balance the following equations. (c) The burning of rocket fuel: C2H8N2 + N2O4 --> N2 + CO2 + H2O
Problema 40a
Balance the following equations. (a) SiCl4 + H2O → SiO2 + HCl
Problema 40b
Balance the following equations. (b) P4O10 + H2O → H3PO4
Problema 40c
Balance the following equations. (c) CaCN2 + H2O → CaCO3 + NH3
Problema 40d
Balance the following equations. (d) NO2 + H2O → HNO3 + NO
- Balance the following equations. (a) VCl3 + Na + CO --> V(CO)6 + NaCl
Problema 41
Problema 42a
Balance the following equations. (a) C6H5NO2 + O2 --> CO2 + H2O + NO2
Problema 42b
Balance the following equations. (b) Au + H2SeO4 → Au2(SeO4)3 + H2SeO3 + H2O
Problema 42c
Balance the following equations. (c) NH4ClO4 + Al → Al2O3 + N2 + Cl2 + H2O
Problema 43a
Balance the following equations. (a) CO(NH2)2(aq) + HOCl(aq) --> NCl3(aq) + CO2(aq) + H2O(l)
Problema 43b
Balance the following equations. (b) Ca3(PO4)2(s) + SiO2(s) + C(s) --> P4(g) + CaSiO3(l) + CO(g)
Problema 44a
What are the molecular (formula) weights of the following substances? (a) Hg2Cl2 (calomel, used at one time as a bowel purgative)
Problema 44b
What are the molecular (formula) weights of the following substances? (b) C4H8O2 (butyric acid, responsible for the odor of rancid butter)
Problema 44c
What are the molecular (formula) weights of the following substances? (c) CF2Cl2 (a chlorofluorocarbon that destroys the stratospheric ozone layer
- In the following drawings, red spheres represent cations, and blue spheres represent anions. Match the drawings (a)–(d) with the following ionic compounds: (i) Ca3(PO4) (ii) Li2CO32 (iii) FeCl2 (a) (iv) MgSO4 (a)
Problema 45
(b)
(c)
(d) Problema 46b
What are the molecular weights of the following pharmaceuticals? (b) C22H27F3O4S (fluticasone, anti-inflammatory)
Problema 46c
What are the molecular weights of the following pharmaceuticals? (c) C16H16ClNO2S (clopidogrel, inhibits blood clots)
- The following pictures represent equilibrium mixtures at 325 K and 350 K for a reaction involving A atoms (red), B atoms (blue), and AB molecules. (a) Write a balanced equation for the reaction that occurs on raising the temperature.
Problema 47
Problema 47a
What are the molecular weights of the following herbicides? (a) C6H6Cl2O3 (2, 4-dichlorophenoxyacetic acid, effective on broadleaf plants)
Problema 47b
What are the molecular weights of the following herbicides? (b) C15H22ClNO2 (metolachlor, pre-emergent herbicide)
Problema 47c
What are the molecular weights of the following herbicides? (c) C8H6Cl2O3 (dicamba, effective on broadleaf plants
Problema 48a
How many grams are in a mole of each of the following substances? (a) Ti
Problema 48b
How many grams are in a mole of each of the following substances? (b) Br2
Problema 48c
How many grams are in a mole of each of the following substances? (c) Hg
Problema 48d
How many grams are in a mole of each of the following substances? (d) H2O
Problema 50
How many moles of ions are in 27.5 g of MgCl2
Problema 51
How many moles of anions are in 35.6 g of AlF3?
Problema 52
What is the molecular weight of chloroform if 0.0275 mol weighs 3.28 g?