General Chemistry Answers

In the reaction Mg(OH)²+2HCl--->MgCl²+2H²0 you were given 15 grams of Mg(OH)² and 25 grams of HCl.Which of the two reactants is the limiting reagents? How much MgCl² will be produced in the reaction?

What is the bond order of be2 -?Berrium molecule two two atoms gained one electron

C4H6O3+H2O C2H4O2

The following pH data were collected in the analysis of water from an upstate New York lake as part of an acid rain study: 4.17, 4.20, 4.19, 4.23, 4.22, 4.14, 4.20, and 4.15. Calculate the following.

(a) mean

(b) median

(c) percent average deviation

(d) percent standard deviation

describe how chlorine gas is produced in electrolysis

II. Describe the spontaneity and entropy of the processes.

1. Formation of CO2 and H2O through the reaction below.

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)

2. Sublimation of naphthalene balls as represented by this equation:

C10H8(s) → C10H8(g)

3. Formation of H2O from H2 and O2 2H2(g) + O2(g) → 2H2O(l)  

. 30.0 g H₂O  at an unknown temperature is mixed with 27.0 g of water at 15.8^oC in a coffee-cup calorimeter. If     

        the final temperature of the mixture is 29.1^oC, what is the initial temperature of the water?

Compare the amount of heat given off by 1.40 mole of liquid water when it cools from 100.0 oC to 30.0 oC to

    that given off when 1.40 mol of steam cools from 200.0 ^oC to 110.0 ^oC   ( Cp H₂O _(l)  = 4.184 j/g-^oC  , Cp H₂O (g)

    = 1.87 J/j-^oC) . Explain your comparison

.   If 35.0 g H2O at 22.7°C is combined with 65.0 g H2O at 87.5°C, what is the final temperature of the 

      mixture? The specific heat capacity of water is 4.184 J/g⋅°C.

A coffee-cup calorimeter contains 50.0 g of water at 60.51°C. A 12.4 g piece of graphite at 24.21°C is  

     placed in the calorimeter. The final temperature of the water and the carbon is 59.02°C. Calculate

     the specific heat of carbon. The specific heat of water is 4.18 J/g⋅°C.