The process during which a substance changes from a solid directly to a gas without becoming a liquid is known as: Example(dry ice) A)
condensation.
B)
fusion.
C)
melting.
D)
sublimation.

There are several common examples of sublimation. A well-known product—dry ice—is actually solid CO 2. Dry ice is dry because it sublimes, with the solid bypassing the liquid phase and going straight to the gas phase. The sublimation occurs at temperature of −77°C, so it must be handled with caution.

Explanation: give me a a thx and a vote bye have a good day

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

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