marci30

11.11.2020 • 

Chemistry

Match each chemical or physical property with its significance or impact. A. Flammable range

1. Used to determine the minimum temperature at which sufficient vapors
of a flammable liquid generate a fire hazard

B. Specific gravity

2. Used to determine effective extinguishing agents and methods

C. Vapor density

3. Used to determine spill control and clean-up procedures for water-
borne releases

D. Solubility

4. Used to determine where an air-borne material will travel

E. Flash point

5. Used to determine whether combustion is a potential hazard

Ответ:

Jasten

18.09.2020

Chemistry

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b. 4

Explanation:

The reaction expression is given as:

   C₃H₈   +   O₂     →    CO₂   +  H₂O

To solve this problem, we employ a mathematical approach.

Now use coefficient a, b, c and d as the numbers that will balance the expression:

            aC₃H₈   +   bO₂     →    cCO₂   +  dH₂O

Conserving C: 3a  = c  

                   H:  8a  = 2d

                    O: 2b  = 2c + d

let a  = 1, c  = 3, d  = 4 , b  = 5

 The balanced reaction expression is:

            C₃H₈   +   5O₂     →    3CO₂   +  4H₂O

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