General Chemistry Answers

What is the freezing point depression and boiling point elevation of the solution with acetic acid (CH3COOH) (MW= 60 g/mol) which weighs 200 grams of acetic acid and 259 grams of water?

1. Use the balanced equation to answer the following question. One Pansit has a mass of 5.0 grams and one Siling Labuyo has a mass of 1.0 gram. How many Hot Pansit can be made from 40.0 grams of Pansit and 26.0 grams of Siling Labuyo?

An elevated level of sodium ions in the blood would be 0.155 mol L^-1 and would be cause for concern. The average adult female has a total blood volume of 4.70 L. Calculate the total mass of sodium ions present when this concentration is found, assuming a blood volume of 4.70 L. 

31.3 L of concentrated nitric acid (8.50 mol L^-1) was spilled on a road. Sodium carbonate solid was spread on the acid to react as in the equation:

CO₃^2-(aq) + 2H⁺ → CO₂(g) + H₂O

How many grams of sodium carbonate are needed to neutralise the acid?

A student needs to react 0.282 mol Zn with hydrochloric acid. Calculate the minimum number of moles of HCl required, assuming all the zinc reacts?

How many grams of water could be heated from 00C to 1000C by the heat released per mole of aluminum oxide formed by the thermite reaction.

Calculate the heat of burning ethane (C2H6) in oxygen to give CO2 and water vapor.

What is the minimum energy required to synthesize sulfur dioxide from sulfuric acid?

An impure 0.578 g sample of KHP required 19.13 ml of 0.0978 M NaOH for complete neutralization. Calculate the percent purity of this impure KHP sample.

A sample of N2 gas (2.0 mmol) effused through a pinhole in 5.5 s. It will take __________ s for the same amount of CH4 to effuse under the same conditions.

2 Pb(NO3)2 --> 2 PbO + 4 NO2 + O2  

How many grams of lead (II) oxide are produced to form 5 grams of oxygen? 

How many grams of lead (II) nitrate are needed to make 7 moles of nitrogen dioxide  

How many moles of oxygen can be made from 14 moles of lead (II) nitrate?  

Calculate the potential of a cell where the Al³⁺ concentration is only 0.10 M. 

2 Al (s) + 3 Cu²⁺ (aq, 1.0 M) → 2 Al³⁺ (aq, 1.0 M) + 3 Cu (s)