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Questions in chemistry

📝 Answered - The molar heat of fusion of gold is 12.550 kJ/mol. At its melting point, how much mass of melted gold must solidify to release 235.0 kJ of energy?

📝 Answered - How does a magnet separate mixtures?

📝 Answered - Which of the following statements about subatomic particles best characterizes electrons? A. Positive charge, light, circling the nucleus B. No charge, heavy, found in nucleus C. Negative charge, light, circling the nucleus D. Negative charge, heavy, circling the nucleus

📝 Answered - How many atoms are there in 90.2 grams of selenium?

📝 Answered - When plastic deformation of a material occurs, the material _____.

📝 Answered - When \(0.2 \, \text{mol}\) of calcium reacts with \(880 \, \text{g}\) of water, \(2.24 \, \text{L}\) of hydrogen gas form at STP. How would the amount of hydrogen produced change if the volume of water was decreased to \(440 \, \text{mL}\) (\(400 \, \text{g}\))?

📝 Answered - The particles of minerals and other rocks that make up a rock are called ______.

📝 Answered - Which best explains why the total mass of the product(s) would be less than the total mass of the reactant(s) after a chemical reaction?

📝 Answered - Is flower color a characteristic or a trait?

📝 Answered - Draw and name all the isomers of the alkene [tex]C_4H_8[/tex].