Because of the wind and the cold from ur breath
Answer:
0.138 moles of oxygen are needed to combine with 0.276 moles of carbon.
Explanation:
Given data:
Moles of oxygen needed = ?
Moles of carbon present = 0.276 mol
Solution:
Chemical equation:
2C + O₂ → 2CO
Now we will compare the moles of carbon with oxygen.
C : O₂
2 : 1
0.276 : 1/2×0.276 = 0.138 mol
Thus, 0.138 moles of oxygen are needed to combine with 0.276 moles of carbon.
Answer:
When effervescent antacid tablets are dropped into water, the tablets slowly disappear and the water becomes fizzy- endothermic
On a hot day, water vapor condenses out of the air and turns into liquid droplets on the outside of a cold glass of lemonade- exothermic
The copper on the Statue of Liberty oxidizes and turns blue.- endothermic
Explanation:
An exothermic reaction is a reaction in which heat is given out to the surrounding. The temperature of the system increases when an exothermic reaction occurs. An endothermic reaction occurs when heat is absorbed and the temperature of the system decreases. Oxidation of elements and effervescence of antacid solution are endothermic processes.
Given that the water vapour in air losses energy upon condensation to liquid, the process is exothermic
Answer:
i think the answer is lettee e- Na.
