1.) The reason to study chemistry is to be able to explain events in the natural world. The correct answer is A.
2.) One advantage of bioplastic is it is made from renewable sources. The correct answer is B.
3.) One example of biotechnology is a driverless, solar powered car. The correct answer is B.
<span>A. Commercial cooking
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Quantity of matter measured to know the weight is called mass, it can be measured in kilograms, grams and many other units. The mass of chalk used is 3.9 g.
<h3>What is mass?</h3>
Chalk is made up of calcium carbonate 
and has some amount of weight called mass.
Given,
- The initial mass of chalk = 43.5 gm
- The final mass of chalk = 39.6 gm
The total amount of the chalk used is calculated as:
Mass used = Initial mass - final mass
Substituting values in the above formula:
Therefore, 3.9 gms of chalk is used.
Learn more about mass here:
brainly.com/question/20157650
<span>B. it claims to be, but is not, a science.
Pseudoscience is a practice that claims to be based on science but isn't. Astrology, like horoscopes or horoscope readings are not true. It has been proven that there is no relation between your "moon sign" and your personality.
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Well magnesium has a negative charge and oxygen has a positive charge which makes them cancel out each other making it an ionic bond :)))))))<span />
