It’s some apps that come in handy for this sorry if I didn’t help
<u>Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. The earliest roots of science can be traced to Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE.</u>
Aliens built the pyramids how would they build them in different regions all on the equator
Answer: Option (c) is the correct answer.
Explanation:
Entropy is defined as the degree of randomness. This means that more is the number of collisions taking place between atoms of a substance more will be the randomness.
Therefore, more will be the entropy of substance. We cannot measure the entropy but we can measure the change in entropy of a substance.
A thermometer is a glass tube that contains a liquid column generally mercury, and it is usually used to measure the temperature of human body.
A calorimeter is a device or apparatus that is used in a chemical reaction to measure the amount of heat involved.
Therefore, we can conclude that the student can't measure entropy directly, only an entropy change.
Answer: 4 moles of Na are needed to produce 4 moles of NaCl
Explanation:
The balanced chemical equation is :
According to stoichiometry :
2 moles of 
are formed from = 2 moles of 
Thus 4 moles of will be formed from = 
of
Thus 4 moles of Na are needed to produce 4 moles of NaCl
