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☆☆☆☆☆Cards in this guide (7)
Where do you place the symbols that represent the state of matter in an equation
. After the chemical formula for each compound
What does an increase of 1 pH number represent
A decrease in hydrogen ion concentration by factor of 10
How many hydrogen ions in a solution with a pH of 4.0
pH = -log[H+] Hence [H+] = 10^-pH = 10^-4 = 1 x 10^-4 mole of H+
Now 1 mole of H+ = 6.022 x 10^23. Hence 1 x 10^-4mole = 6.022 x 10^19 H+ ions.
How can one tell if a reaction has reached its equilibrium
All motion ceases
What bsre the materials for chemical reactions
materials used in chemical reactions are reactants
How do changes in temperature and activation energy compare in how they affect reaction rate Apex
Changes in temperature and activation energy have opposite effects on reaction rate.
What Bond energy needed to break or create bonds is measured in units is called
The answer is B. Kilojoules
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