D is true because NO2 is a catalyst, and a catalyst is a compound which makes a reaction occur faster (not necessarily more effectively, creating more product, but it decreases the amount of time it takes).
I think the best example of rotational motion is :
The wheel spins as long as the hamster keeps running
Rotational motion refer to a rotation movement in which the main axis point stays the same
hope this helps
Answer & explanation:
To balance a chemical equation, we must make sure that there are equal amounts of each element in the equation on either side.
To balance an equation step-by-step we first start by counting the amount of each element on each side. If they aren't equal, we must make them amounts equal on either side.
After you make sure all the elements are balanced, the net charge on both sides must also be equal.
Answer: 
Explanation:
Multiply by t on both sides.
Now divide by I to isolate t.
Answer:
0.165
Explanation:
Feel free to let me know if this is wrong because I have seen the question before but cannot really remember!
