A battery and a banana are the same when considering energy:
A battery when connected to a device produces electro-chemical reactions and contains one or more cells. The same thing can be tried out with fruits also. There are many fruits which can be taken into account. A lemon shows less amount of voltage when seen through a multimeter rather than a banana which shows a higher voltage. This was because of the acid present in the a fully ripped banana. The acid is called ascorbic acid. This acid has a higher pH level than compared to the pH of the citric acid found in lemon.
This shows that a banana plant is not so expensive and reliable for the production of renewable energy and a battery is also inexpensive, reliable and stable.
It is imperative to test various trials of a test to guarantee that your outcomes are accurate,reliable, and reproducible. On the off chance that you had mentioned a blunder for your objective facts in the primary trial,they ought to be mentioned clear by your objective facts in your second trial.
Answer is: A. pure substance.
Pure substance is made of only one type of atom (chemical element) or only one type of molecule (chemical compound), it has definite and constant composition with distinct chemical properties.
Glucose is chemical compound composed of carbon, hydrogen and oxygen atoms connected with covalent bonds.
Pure substances can be separated chemically, not physically, that is difference between pure substances and mixtures.
Answer:
B.
Explanation:
Elemental analysis involves the actual percentage compositions of each element in the sample of the compounds. We know that there are two different compounds here that both contain copper and oxygen. What we don't know is the actual number of copper or oxygen composed in the compounds.
An elemental composition of these compounds would thus tell us this and will give an idea of the chemical formula of each since we now know quite well the percentage composition of each of these elements