Twenty-four grams of a substance require 270. Joules of heat to increase its temperature from 25 to 50. ˚C. What is the specific heat of the substance? SELECT AN ANSWER

2.2 J/ g ˚C

.45 J/ g ˚C

.15 J/ g ˚C

.0038 J/ g ˚C

What is the ph of a solution with a concentration of 5.2 × 10–8 m h3o+?

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?