Answer:
Na = 32.4% , % S = 22.6% and %O = 45.0%
Explanation:
% Na = 3.4/10.5. × 100%
= 32.4%
%S = 2.37/10.5 × 100%
= 22.6%
% O= 4.73/10.5 × 100%
= 45.0%xplanation:
Uh no I can’t help but, I hope you have a good day!
The answer is B because isotopes have the same number of protons and neutrons.
All of the above
Explanation:
Science is a methodical way of investigating the world around us in order to find out the truth and facts about them. Technology is the practical aspect of science.
- The knowledge and understanding of x-rays as part of the electromagnetic radiation made it possible to use the rays to study the internal structures of substances.
- The discovery of radioactivity has led to the development of nuclear energy that are produced in nuclear reactors.
- Satellites are built on the principles of science.
- Robotic machines are based on scientific studies and electricity originated from a good knowledge of the atom.
Learn more:
radioactivity brainly.com/question/10125168
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Answer:A) It was developed from past observations- true
It is subject to experimentation and revision.- false
It explains why mass is conserved- false
It predicts future observations-true
Explanation:
Before a hypothesis is proclaimed to be a law in science, numerous observation must have confirmed its validity and rigorous experimentation under carefully controlled conditions usually precedes the acceptance of a hypothesis as a law. The law of conservation of mass was developed from numerous past observation that proved its validity.
