1) Which of the following is a solid at room temperature with the lowest melting point?...

1) Which of the following is a solid at room temperature with the lowest melting point?

a. caffine b. sodium carbonate c. water d. dichloromethane e. sodium sulfate

2) Which has the highest density and is solid at room temperature?

a. caffine b. sodium carbonate c. water d. dichloromethane e. sodium sulfate

Solutions

Expert Solution

a. Caffeine is solid at room temperature and has melting point 235 °C (455 °F) and has density 1.23 g/cm³

b. Sodium carbonate is solid at room temperature and has melting point 851 °C (1564 °F) and has density 2.54 g/cm³

c. Water is liquid at room temperature and has melting point 0^oC (32 ^oF) and has density 1 g/cm³

d. Dichloromethane is liquid at room temperature and has melting point −96.7 °C (−142.1 °F) and has density 1.3266 g/cm³

e. Sodium sulfate is solid at room temperature and has melting point 884 °C (1623 °F) and has density 2.664 g/cm³

Therefore,

1) Solid at room temperature with lowest melting point is Caffeine

2) Highest density solid at room temperature is Sodium sulfate

queen_honey_blossom answered 1 year ago

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