6 9
Question 22 (2.5 points)
Based on the following balanced equation, how many moles of H2O can form from the reaction of 6 moles of
CHA?
CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H20 (g)
12
a) 3
15
b) 18
o
18
c) 6
d) 12
21

d) 12

Explanation:

Given data:

Moles of CH₄ react = 6 mole

Moles of water formed = ?

Solution:

CH₄ + 2O₂      →   CO₂ + 2H₂O

Now we will compare the moles of CH₄ with water.

                 CH₄           :          H₂O

                   1              :            2

                  6              :          2/1×6 = 12 moles

Thus from 6 moles of CH₄ 12 moles of water produced.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.