Question

Gallium metal melts at 29.8°C. At the melting point the density of the solid is 5-90 g/ml, and that of the liquid is 6.10 g ml. a Does solid gallium expand or contract when it is melted? contracts Explain The same amount of mass occupies space in the liquid phase than in the solid phase. 6. What is the change in volume when 6.10 mL (cm) of solid gallium is melted? Volume by mi Reference Lt 30.0°C.Calculate the change in solutne that occurs when 7.50 x 10 mis of water heated from 10.0°C and 0.996 Biquid water has a density of 100ml, 10.0°C to 30.0°C Change in volume = mL Submit Answer Try Aliso Vuralon itom attmpts remaining The density of the carbon dioxide gas under thes (References A1.20-1. rubber balloon is filled with carbon dioxide gas at a temperature of 0.00+C and a pressure of 100 atm conditions is 198 g L. a. Will the density of the carbon dioxide gas increase or decrease when the balloon is belted? The density will At 450°C, the balloot has a volume of 140 L. Calculate the carbon dioxide density at tlus temperature: Density= el Divram

Answer 1

1. a) The same amount of mass occupies less space than in the liquid phase in the soild phase.

        That's why the density of solid gallium (5.90g/cm³ ) increases to 6.10 g/cm ³ , increase in density is due the the decrease in volume.that means it contracts.

2.