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During a physical change, new chemical bonds are formed.
During a physical change, new chemical bonds are formed.
False
Physical changes can involve phase changes such as melting and condensation.
Physical changes can involve phase changes such as melting and condensation.
True
The SI unit for temperature is Celsius.
The SI unit for temperature is Celsius.
False
Volume is considered an intensive property.
Volume is considered an intensive property.
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1 m³ is equivalent to 1,000 liters.
1 m³ is equivalent to 1,000 liters.
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Dissolving sugar in water is an example of a physical change.
Dissolving sugar in water is an example of a physical change.
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The derived SI unit of density is kg/m³.
The derived SI unit of density is kg/m³.
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1 nm is equal to 10^9 m.
1 nm is equal to 10^9 m.
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The molar mass of H2O is 18 g/mol.
The molar mass of H2O is 18 g/mol.
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The molecular mass of calcium carbonate CaCO3 is equal to 120 amu.
The molecular mass of calcium carbonate CaCO3 is equal to 120 amu.
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To find the number of moles, the formula is n = m × M.
To find the number of moles, the formula is n = m × M.
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1 g of Selenium (Se) corresponds to approximately 1.266×10^(-2) moles.
1 g of Selenium (Se) corresponds to approximately 1.266×10^(-2) moles.
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Each molecule of Acetylsalicylic acid C9H8O4 contains 8 oxygen atoms.
Each molecule of Acetylsalicylic acid C9H8O4 contains 8 oxygen atoms.
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The mass percent of an element in a compound can be calculated using the formula mass % = (n × molar mass of element / molar mass of compound) × 100%.
The mass percent of an element in a compound can be calculated using the formula mass % = (n × molar mass of element / molar mass of compound) × 100%.
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The number of moles in 14.8 g of calcium carbonate is 0.148 moles.
The number of moles in 14.8 g of calcium carbonate is 0.148 moles.
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The number of molecules in 0.287 moles of Acetylsalicylic acid is approximately 1.66×10^23 molecules.
The number of molecules in 0.287 moles of Acetylsalicylic acid is approximately 1.66×10^23 molecules.
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The molecular formula of the compound with the empirical formula CH2O and molar mass of 60 g/mol is C2H4O2.
The molecular formula of the compound with the empirical formula CH2O and molar mass of 60 g/mol is C2H4O2.
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The number of molecules in 9.8 g of sulfuric acid (H2SO4) is 6.022 x 10^24.
The number of molecules in 9.8 g of sulfuric acid (H2SO4) is 6.022 x 10^24.
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One amu is equal to 1 gram.
One amu is equal to 1 gram.
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The mass percent of nitrogen (N) in zinc nitrate Zn(NO3)2 is approximately 14.8%.
The mass percent of nitrogen (N) in zinc nitrate Zn(NO3)2 is approximately 14.8%.
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The balanced chemical equation for the combustion of octane (C8H18) includes carbon dioxide and sulfur dioxide as products.
The balanced chemical equation for the combustion of octane (C8H18) includes carbon dioxide and sulfur dioxide as products.
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The mass of one atom of magnesium (Mg) is 24/NA g.
The mass of one atom of magnesium (Mg) is 24/NA g.
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The molecular formula for one molecule of C2H6 has a mass of 30/NA g.
The molecular formula for one molecule of C2H6 has a mass of 30/NA g.
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The molar mass of CaSO4·2H2O is 172 g/mol.
The molar mass of CaSO4·2H2O is 172 g/mol.
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The order of electronegativity for the elements 3Li, 11Na, 19K, and 37Rb from highest to lowest is 3Li > 11Na > 19K > 37Rb.
The order of electronegativity for the elements 3Li, 11Na, 19K, and 37Rb from highest to lowest is 3Li > 11Na > 19K > 37Rb.
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When moving from top to bottom in a group of the periodic table, atomic size decreases.
When moving from top to bottom in a group of the periodic table, atomic size decreases.
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The energy of light is directly proportional to frequency.
The energy of light is directly proportional to frequency.
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The wavelength of light increases as the frequency increases.
The wavelength of light increases as the frequency increases.
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In a molecule, intramolecular forces are those that occur between different molecules.
In a molecule, intramolecular forces are those that occur between different molecules.
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Thermodynamic equilibrium refers to the state where the rates of the forward and reverse reactions are equal.
Thermodynamic equilibrium refers to the state where the rates of the forward and reverse reactions are equal.
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Endothermic phase changes absorb energy from the surroundings.
Endothermic phase changes absorb energy from the surroundings.
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Molecular forces only refer to the ionic bonds present within a molecule.
Molecular forces only refer to the ionic bonds present within a molecule.
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When 1.8 mol of H2 reacts completely, it produces 1.2 mol of NH3.
When 1.8 mol of H2 reacts completely, it produces 1.2 mol of NH3.
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To produce 1 kg of NH3, 823.5 g of N2 is required.
To produce 1 kg of NH3, 823.5 g of N2 is required.
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The molar mass of NH3 is 20.4 g/mol.
The molar mass of NH3 is 20.4 g/mol.
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To react with 6 g of N2, 1.28 g of H2 is consumed.
To react with 6 g of N2, 1.28 g of H2 is consumed.
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The molecular formula of a compound with a simplest formula of CH2O and a molar mass of 180 g/mol is C6H12O6.
The molecular formula of a compound with a simplest formula of CH2O and a molar mass of 180 g/mol is C6H12O6.
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One mole of water contains two moles of hydrogen atoms.
One mole of water contains two moles of hydrogen atoms.
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The mass of oxygen required for the combustion of 16 g of methane is 36 g.
The mass of oxygen required for the combustion of 16 g of methane is 36 g.
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The calculated mass percent of sulfur in copper sulfate (CuSO4) is 20%.
The calculated mass percent of sulfur in copper sulfate (CuSO4) is 20%.
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Electrons fill orbitals in order of descending energy according to the Aufbau principle.
Electrons fill orbitals in order of descending energy according to the Aufbau principle.
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According to Hund's Rule, electrons will fill degenerate orbitals by pairing up first.
According to Hund's Rule, electrons will fill degenerate orbitals by pairing up first.
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Pauli’s exclusion principle allows two electrons in the same orbital to have the same spin.
Pauli’s exclusion principle allows two electrons in the same orbital to have the same spin.
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The electronic configuration of 4Be is 1s²2s².
The electronic configuration of 4Be is 1s²2s².
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The 2p orbital has lower energy than the 3p orbital.
The 2p orbital has lower energy than the 3p orbital.
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The 2p orbital can contain a maximum of 6 electrons.
The 2p orbital can contain a maximum of 6 electrons.
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The number of unpaired electrons in 15P is 3.
The number of unpaired electrons in 15P is 3.
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The general electron filling order for sublevels starts from 1s and goes to 7s.
The general electron filling order for sublevels starts from 1s and goes to 7s.
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