Question
What do these two changes have in common? dry ice sublimating and becoming a gas snowflakes forming in a cloud Select all that apply. Both conserve mass. Both are changes of state. Both are chemical changes. Both are caused by heating.
Solution
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(207 Votos)
Guilherme
Mestre · Tutor por 5 anos
Resposta
A. Both conserve mass.B. Both are changes of state.
Explicação
## Step 1The problem presents two changes: dry ice sublimating and becoming a gas, and snowflakes forming in a cloud. We need to identify the commonalities between these two changes.## Step 2The first change, dry ice sublimating and becoming a gas, is a physical change where solid carbon dioxide (dry ice) changes directly into a gas without becoming a liquid. This is a change of state from solid to gas.## Step 3The second change, snowflakes forming in a cloud, is a physical change where water vapor in the air cools and changes into a solid state, forming snowflakes. This is also a change of state from gas to solid.## Step 4Both of these changes are physical changes, not chemical changes. They do not involve the formation of new substances, but rather the change of state of the same substance.## Step 5Both of these changes conserve mass. In a physical change, the mass of the substance does not change. The mass of the substance before the change is equal to the mass of the substance after the change.## Step 6Neither of these changes are caused by heating. Dry ice sublimates at a temperature below the freezing point of water, and snowflakes form when water vapor cools and changes into a solid state.