Answer:
The correct answer is option c.
Explanation:
Solid state : It is a state in which the particles are closely packed and does not have any space between them. They have least kinetic energy due to restricted movement. This state has a definite shape and volume.
Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another and thus have higher kinetic energy as compared to solids. This state has a definite volume but does not have a fixed shape.
Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them. They have highest kinetic energy. This state has indefinite volume as well as shape.
So, when water molecules that forms ice melts it gains kinetic energy due to increase in temperature by which they gain kinetic energy and starts moving away from each other converting their state from solid to liquid.
Answer:
Mass percent of silicon = 46.75% (Approx)
Explanation:
Given:
Mass of silicon = 0.389 g
Mass of silicon dioxide = 0.832 g
Find:
Mass percent of silicon
Computation:
Mass percent of silicon = Mass of silicon / Mass of silicon dioxide
Mass percent of silicon = [0.389 g / 0.832 g]100
Mass percent of silicon = 46.75% (Approx)
5CO2 should be in the blank spot.
the reaction would be 7
When substances change state there is no change in mass. so for physical changes are generally easy to reverse though the end product may not always look exactly the same as the starting material.
Boiling water- hot water rises from the bottom of the pan where it is initially heated and cooler water moves down to replace it, causing a circular motion.