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50 g of CO2 + 50g of H2O equals 20g of C6H12O6 + 40g of O2. Is this equation balanced or unbalanced?
Unbalanced
Physical or Chemical Change: A piece of bread molds.
Chemical
Physical or Chemical Change: Sugar dissolving in tea.
Physical
Physical or Chemical Change: A chain link fence rusting
Chemical
Physical or Chemical Change: Melting glue in a hot glue gun
Physical
How many atoms, elements, and molecules does the following formula have: 4C3H8 ?
Atoms: 44, Elements: 2, Molecules: 4
How do you determine if a chemical equation is balanced or unbalanced?
The total amount of atoms of each element must be the same on the reactants and products side of the equation.
Briefly explain the Law of Conservation of Mass in your own words.
The Law of Conservation of Mass states that matter cannot be created or destroyed.
Balanced or Unbalanced? Mg + HCl → MgCl2 + H2
Unbalanced
Balanced or Unbalanced? 3C + 2Fe2O3 → 4Fe + 3CO2
Balanced
Balanced or Unbalanced? Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3
Balanced
Balanced or Unbalanced? 6CO2 + 6H2O → C6H12O6 + 6O2
Balanced
Balanced or Unbalanced? SnO2 + 2H2 → Sn + H2O2
Unbalanced
The ____________________ are the elements or compounds on the left side of a chemical equation.
Reactants
In a(n) ____________________ equation the number of atoms for each element are equal for the reactants and products.
Balanced
A(n) ____________________ is a shorthand representation of an element or compound using chemical symbols.
Chemical Formula
The __________ are the elements or compounds on the right side of a chemical equation.
products
Which of the following chemical formulas contains the most molecules? a. 5CO b. 3H2O c. 2Fe2O3 d. 4C3H8
a. 5CO
Which of the following chemical formulas contains the most total atoms? a. CO b. H2O c. Fe2O3 d. C3H8
d. C3H8
Which of the following chemical formulas contains the most elements? a. CO b. NaCl c. NaHCO3 d. H2O
c. NaHCO3
Which of the answers below would be a correct chemical symbol of an element? a. BE b. be c. bE d. Be
Be
If the number of atoms of each element in a chemical equation are not equal on both sides of a chemical equation, then the equation is -
Unbalanced
How many molecules of carbon dioxide does this formula indicate you have: 6CO2?
6
Which number in a chemical formula tells you how many molecules of an element or compound you have?
Coefficient
Which number in a chemical formula tells you how many atoms of an element you have?
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