Can someone help me like explain how to do these I keep getting them wrong please? 1.)Answer the following questions about water, which has a heat of vaporization of 540 cal/g. How much energy in calories is absorbed when 77 g of water is vaporized?
Can someone help me like explain how to do these I keep getting them wrong please?
1.)Answer the following questions about water, which has a heat of vaporization of 540 cal/g.
How much energy in calories is absorbed when 77 g of water is vaporized?
2.)Which type of crystalline solid is formed by each substance: (a) CaCl2 (b) Fe (iron); (c) sugar (C12H22O11); (d) NH3(s)?
3.)Classify each solid as amorphous, ionic, molecular, network, or metallic.
a. KI:
(select)
b. CO2:
(select)
c. bronze, an alloy of Cu and Sn:
(select)
d. diamond:
(select)
e. the plastic polyethylene:
4.)The temperature of a 0.50−L gas sample at 25°C and 1.00 atm is changed to each of the following temperatures. What is the final pressure of the system? The volume and the number of gas particles are constant.
a. 320. K atm
b. 160. K atm
5.)The pressure inside a 1.0 L balloon at 25°C was 750 mm Hg. What is the pressure (in mmHg) inside the balloon when it is cooled to −87°C and expands to 1.7 L in volume?
6.) Which species in each pair has stronger intermolecular forces? Choose the correct symbol: greater than (>) or less than (<)
a. CO2 H2O
b. CO2 HBr
c. HBr H2O
d. He atoms Ne atoms
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