The melting point of a particular compound is fixed and it is an important identification of an unknown compound. The practice to determine the melting point of an unknown material In different ratio with a known material is important to get the exact melting point of the unknown material. In different ratio the melting point of the unknown material will be fixed as the melting point of a pure material doesn't depend on the ratio in which they are mixed with other material. To get the exact melting point it is always good to get the melting point twice in different ratio.
Answer:
Option A
Explanation:
They are portable resources that convert chemical energy to electrical energy
Answer:
I don't know because I don't know about chemistry
Answer:
C
Explanation:
Fractions and negative numbers are considered rational numbers.
Fractions are not considered integers.
A, a car parked in the sun with its windows closed.
The greenhouse effect is where there is so much pollution in the air, the heat from the sun cant escape the earth. just like a parked car with its windows closed, the heat generated inside of it will build up. all three other examples allow the heat to move freely.