Question

I need the answers for this questions with explanation and please show the process of the calculation.

1. Because density is a physical property of matter? 2. Is density an extensive or intensive property? 3. Which has less density, liquid water or ice?. Why? 4. Calculate the density of a metal object with a volume of 20.2 cm3 and a mass of 159 g. Say the type of material of the object if in a table we find the following data for manganese, iron, or nickel, 7.21 g/ cm3, 7.87 g / cm3 and 8.90 g / cm3 respectively. What is the metal for the calculated data? 5. A liquid whose volume is 10.7 mL has a mass of 9.42 g. which is the liquid between the following octane, ethanol and benzene whose densities respective ly in that order are 0.702 g /cm3, 0.789 g/ cm3 and 0.879 g/cm3 6. Ethanol (grain alcohol) has a density of 0.789 g / cm3. What volume of ethanol must be emptied into a test tube so that its mass equals 30.3 g? 7. Which of the following do not constitute a chemical change? a) Ignition of a mixture of gasoline air in the engine of a car b) Spray together a mixture of sugar and salt c) Water formation of H2 and 02 d) Burning a leno in a fireplace e) Freezing of water on a cold day. 8. In the following table, arrange the densities of the following substances in order of size: Plomo 11.3 g / cm3, dOxiggas 1.33x10-3 g/ cm3, isopropyl alcohol 0.785 g/cm3, ethanol 0.789 g/cm3, platinum 22.5 g/ cm3, silicon 2.33 g/ cm3. 9. Exercise: Identify which of the following are classified as intensive property or extensive property: a) Volume b) Temperature c) Pressure d) Melting point e) Boiling point

Answer 1

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