30 Questions
What type of equation represents a chemical reaction using words?
Word equation
What is the general word equation for the reaction of metals with oxygen?
metal + oxygen → metal oxide
What is the purpose of coefficients in a chemical equation?
To balance the number of atoms on both sides of the equation
What is represented in a picture equation?
Particle diagrams of the reactants and products
What are the small numbers within a chemical formula called?
Subscripts
What is the general formula for the oxides of Group 1 metals?
M2O
Which of the following equations represents the reaction of calcium with oxygen?
2Ca + O2 → 2CaO
What is the product of the reaction between iron and oxygen?
iron(III) oxide
How many moles of oxygen are required to react with 4 moles of iron?
3 moles
What is the word equation for the reaction of iron with oxygen?
iron + oxygen → iron(III) oxide
What is the general chemical equation for Group 2 metals reacting with oxygen?
2M + O2 → 2MO
What is the formula of the oxide formed when a Group 1 metal reacts with oxygen?
M2O
What is the correct chemical equation for the reaction of potassium with oxygen?
4K + O2 → 2K2O
What is the product of the reaction between iron and oxygen?
iron (III) oxide
What is the correct coefficient of iron in the balanced equation for the reaction of iron with oxygen?
4
What is the main difference between a word equation and a chemical equation?
Word equations use words, while chemical equations use symbols and formulas.
What is the purpose of balancing a chemical equation?
To ensure the number of atoms for each element is equal on both sides of the equation.
What is represented by the numbers in front of the chemical formulas in a chemical equation?
Coefficients
What is the product of the reaction between magnesium and oxygen?
Magnesium oxide (MgO)
What type of diagram is used to represent the particles involved in a chemical reaction?
Picture equation
What is the primary reason for balancing a chemical equation?
To ensure the number of atoms for each element is equal on both sides of the equation
What is the role of subscripts in a chemical formula?
To denote the number of atoms of an element in a molecule
What is the advantage of using chemical equations over word equations?
Chemical equations provide a more detailed representation of the reaction
What is the purpose of coefficients in a chemical equation?
To specify the mole ratio of the reactants
Which of the following is a characteristic of a picture equation?
It represents the particles involved in a chemical reaction
What is the difference between the oxides formed by Group 1 and Group 2 metals?
Group 1 metals form oxides with the formula M2O, while Group 2 metals form oxides with the formula MO.
Which of the following reactions is an example of a Group 2 metal reacting with oxygen?
2Ca + O2 → 2CaO
What is the coefficient of oxygen in the balanced equation for the reaction of iron with oxygen?
3
What is the formula of the oxide formed when a Group 2 metal reacts with oxygen?
MO
Which of the following is NOT a characteristic of the reaction of Group 2 metals with oxygen?
The reaction involves the formation of a metal hydroxide.
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