Units 3 & 4 CMT Review OL

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What is the molecular formula of a compound?

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The molecular formula of a compound shows the actual number of atoms of each element in a molecule. For example, C6H12O6 is the molecular formula for glucose.

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What is the empirical formula of a compound?

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The empirical formula of a compound represents the simplest whole number ratio of the elements in that compound. For example, the empirical formula of C6H12O6 is CH2O.

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How do you determine the coefficients in a balanced chemical equation?

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Coefficients are determined by balancing the number of atoms of each element on both sides of the equation. This ensures the law of conservation of mass is followed.

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What is the molar mass of a compound?

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The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in the formula.

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What is the significance of balancing chemical equations?

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Balancing chemical equations is important because it reflects the conservation of mass, ensuring that the same number of each type of atom is present on both sides of the equation.

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What is the difference between a molecular formula and an empirical formula?

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A molecular formula shows the actual number of atoms in a molecule, while an empirical formula shows the simplest ratio of the elements.

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How do you calculate the molar mass of Ba(C2H3O2)2?

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To calculate the molar mass, sum the atomic masses: Ba (137.33) + 2*(C (12.01)*2 + H (1.01)*3 + O (16.00)*2) = 255.3 g/mol.

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What are coefficients in a chemical equation?

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Coefficients are the numbers placed before compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

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What is a chemical formula?

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A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numerical subscripts to indicate the number of atoms.

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What does it mean for a chemical equation to be balanced?

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A balanced chemical equation has equal numbers of each type of atom on both sides, indicating that mass is conserved during the reaction.