Answer:
False
Explanation:
A phase change does not involve changing the identity or makeup of that species. When you take solid ice and melt it (add enough energy to it) it changes to water, which is now a liquid. A chemical change would involve reactions taking place that would change the whole identity of that species.
The time it will take for a car travelling 88 km/hr (55mi/hr) to travel 500km would be 3.5 hours.
How? Add 88 + 58.
That'll equal 143, then divide 500 ÷ 143 = 3.5
So, 3.5 is the time that the car will take travelling 88 km/hr trying to reach the destination of 500km.
Answer:
Single Replacement; 2, 1, 1, 1
Explanation:
2HCl + Zn → H2 + ZnCl2
In a single replacement reaction, one specie is replaced by another specie in a chemical reaction.
If we look at the reaction above, zinc metal reacted with hydrochloric acid. The reaction proceeds in such a manner that zinc replaces hydrogen in hydrochloric acid. This is a single replacement reaction because only one chemical specie is displaced in the reaction.
How i be feeling waiting for my questions to be answered in the middle of a quiz.
