Answer: Each trial was repeated several times during the experiment.
A scientific design refers to a scientific plan or methodology, which needs to be followed to perform a experiment so as to obtain accurate and appropriate result matching with the situation of the hypothesis. Each trial was repeated several times during the experiment best describes an experiment that had a good scientific design because trials in an experiment brings either concordant or consistent results or inconsistent results. The concordant results suggests that the methodology applied is correct, and inconsistent results show that methodology applied is incorrect.
Answer:
They have to
Explanation:
It occurs when 2 or more molecules interact and their bonds change
Answer:
The answer for 17 is maybe
Answer:
It's a physical not a chemical change
Explanation:
The atomic mass number of the unknown nucleus is 128.
The relationship between the radius of the nucleus r and the atomic mass A is given by
If we assume that the nucleus is a sphere, the volume V is
let the volume of the nucleus having atomic mass number of 64 be V, then the volume of the unknown nucleus having atomic mass number A is written as
Thus, we find that the atomic mass number of the unknown nucleus is A=128
Learn more about atomic mass nuclear charge:
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