General Chemistry Answers

A 20.0-L volume of methane gas is heated from 25°C to 70°C at constant pressure. What is the final volume of the gas?

Balance the following reactions by half-reaction method. Identify the oxidizing agent and the reducing agent. Show your process in balancing the reactions.

Ag + I^- + Sn⁴⁺       AgI + Sn²⁺   

Ti³⁺ + Fe(CN)₆^3-       TiO²⁺ + Fe(CN)₆^4- 

HNO₂ + MnO₄^-       NO₃^- + Mn²⁺  

Aluminum oxide has a composition of 52.9% aluminum and 47.1% oxygen by mass. If 16.4g of aluminum reacts with oxygen to form aluminum oxide, what mass of oxygen reacts?

A certain concentration works best when the analyte’s concentration is approximately 10ppb.

B. If the analyte is present at 10% w/v, how would you prepare the sample for analysis

2 AlBr₃ + 3 Cl₂ → 2 AlCl₃ + 3 Br₂

If a reaction occurs using 3.75 moles AlBr₃, how many moles of Br₂ would be produced? 

A 10 percent (W/V) salt solution is used in making pickles.what Mass of salt is present in 750 ml of this solution

Which of the following has the lowest vapor pressure at room temperature and 1 atm pressure?

CH₃CH₃

CH₃OCH₃

CH₃CH₂OH

CH₃OH

CH₄

What is the buffering region for octanic acid that has pKa = 4.89?

what volume (in mL) of 18.0M H2SO4 is needed to contain 2.45g H2SO4

The pH of an acid solution is 3. It may be all of the following solutions except. A: 10─3 M HCl solution. B: 10─3 M CH3COOH solution. C: 10─3 M HNO3 solution. D: 10─3 M HBr solution. E: 5 x10─4 M H2SO4 solution.