Answer:
The correct balanced equation is: 4Al + 3O₂ ➞ 2Al₂O₃
Explanation:
Unfortunately, that isn't the balanced equation. If you take the original equation [unbalanced],
Al + O₂ ➞ Al₂O₃
We have 1 aluminium and 2 oxygen on the left-hand side. On the right-hand side, we have 2 aluminium and 3 oxygen. So we must add 3 on the oxygen in the left-hand side and 2 on the aluminium oxide in the right-hand side.
Al + 3O₂ ➞ 2Al₂O₃
Now if you check, we have 1 aluminium and 6 oxygen on the left-hand side and 4 aluminium and 6 oxygen on the right-hand side. The number of moles of oxygen is equal but the number of moles of aluminium isn't. So we must add 4 on the aluminium of the left-hand, in order to have a balanced equation.
4Al + 3O₂ ➞ 2Al₂O₃
The time difference between New York and Seattle is 3 hours. Since there is a 24 hour time difference in the globe, the equation is expressed (3/24) * circumference of Earth = distance. Distance is equal to 3000 miles hence the circumference is equal to 24,000 miles. The radius then is equal to 24,000/2 pi or 12,000/ pi. The rotational speed is 3000 miles/ 3 hours or 1000 miles/hr.
Answer:
137.2 in pounds and in Newton's it's 588.399
Push ups are harder because when doing pushups you are building your muscle strength by pushing up and going down but curl ups you are on the floor and using your body to help pull yourself up each time you go up and down