Determine the best formula for reacting elements.
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
Calcium is a metal and iodine is a non-metal. So, when calcium and iodine combine with each other then calcium will donate its excess of electrons to the iodine atom. Thus, it will form an ionic bond.
When calcium reacts with iodine then it results in the formation of calcium iodide.
The reaction equation will be as follows.
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Answer:
Gas
Increase the pressure
Explanation:
Let's refer to the attached phase diagram for CO₂ (not to scale).
<em>At -57 °C and 1 atm, carbon dioxide is in which phase?</em>
If we look at the intersection between -57°C and 1 atm, we can see that CO₂ is in the gas phase.
<em>At 10°C and 2 atm carbon dioxide is in the gas phase. From these conditions, how could the gaseous CO₂ be converted into liquid CO₂?</em>
Since at 10°C and 2 atm carbon dioxide is below the triple point, the only way to convert it into liquid is by increasing the pressure (moving up in the vertical direction).
