
Semester 2nd Review
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a Balanced Chemical Equation (BCE)?
Back
A Balanced Chemical Equation shows the equal number of atoms for each element in the reactants and products, ensuring the law of conservation of mass is followed.
2.
FLASHCARD QUESTION
Front
What is the right ratio of chemicals for the BCE: CO + Fe2O3 --> Fe + CO2?
Back
The correct ratio is 3,1 --> 2,3.
3.
FLASHCARD QUESTION
Front
How can you reduce the pressure in a closed container?
Back
By decreasing the number of particles in the container.
4.
FLASHCARD QUESTION
Front
What is the effect of increasing concentration on the speed of a reaction?
Back
Increasing concentration increases the speed of reaction by increasing collisions between reactant particles.
5.
FLASHCARD QUESTION
Front
In the reaction N2(g) + 3 H2(g) <=> 2 NH3(g), what happens to concentrations if pressure is increased?
Back
The concentration of NH3 will increase as it has fewer moles of gas.
6.
FLASHCARD QUESTION
Front
What is the role of activation energy in chemical reactions?
Back
Activation energy is the minimum energy required for a reaction to occur.
7.
FLASHCARD QUESTION
Front
What is the relationship between temperature and reaction rate?
Back
Increasing temperature generally increases the reaction rate by providing more energy to the reactants.
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