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Weegy: For water (H2O), you have 2 hydrogen atoms and 1 oxygen atom: Molar mass of H2O = 2(1 g/mol) + 1(16 g/mol) Molar mass of H2O = 2 g/mol + 16 g/mol Molar mass of H2O = 18 g/mol Therefore, the correct answer is: 18 g/mol. User: Which law states that the volume of a gas is directly proportional to its temperature at constant pressure? A) Boyle's Law B) Charles's Law C) Avogadro's Law D) Dalton's Law Weegy: Boyle's Law states that volume is inversely proportional to pressure at constant temperature. User: What type of reaction is represented by: 2 H + O 2 H O? A) Combustion B) Synthesis C) Decomposition D) Single displacement (More)

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Weegy: Covalent bonds involve sharing electron pairs. User: What is the pH of a neutral solution at 25°C? A) 0 B) 7 C) 14 D) 1 Weegy: The pH of a neutral solution at 25 C is 7. User: 6. Which element has the highest electronegativity? A) Fluorine B) Oxygen C) Chlorine D) Nitrogen Weegy: Fluorine has the highest electronegativity. User: What is the main component of natural gas? A) Ethane B) Propane C) Methane D) Butane Weegy: Methane is the main component of natural gas. User: Which of the following is an example of a metalloid? A) Aluminum B) Silicon C) Iron D) Calcium (More)