What would happen to the amount of matter on earth if mass were not conserved during changes of state?
B. A gram would have a lot more molecules of propane than a mole
Answer:
C) It explains why mass is conserved
Explanation:
The experimental studies carried out by Antoine Laurent Lavoisier led him to conclude that in a chemical reaction, which takes place in a closed system, the sum of the masses of the reagents is equal to the sum of the masses of the products, as in the following scheme:
m (reagents) = m (products)
* Where m represents mass
Thus, for example, when 4 grams of hydrogen (H) react with 16 grams of oxygen (O), 20 grams of water (H₂O) are formed.
So also if 14 grams of carbon (C) react with 34 grams of oxygen, 48 grams of carbon dioxide (CO₂) are formed.
In short, the law of conservation explains that the proportion, by mass, of the elements that participate in the composition of a substance is always constant and does not depend on the chemical process by which the substance is obtained.
Stars are made of gas & star color is related to temperature are the correct answers.
Answer:
1. Density can be used to identify a substance
2. Density can be used to ascertain whether a substance will float in water.
Explanation:
The calculation of the density of a substance can be used to identify the substance. If the density of a substance is calculated accurately, and compared with a table of standard densities, then we can identify that substance.
Also, density determines whether an object will float or sink in water. If an object is less dense than water then it will float in water. If it is denser than water, then it will sink in water.
