Answer;
A. letters to tuna companies
The use of dolphin-safe nets for catching tuna was started because of letters to tuna companies.
The use of dolphin-safe fishing methods was started because lots of dolphins were drowning in nets used to catch yellow fin tuna. The method was a new plan that the US had created in order to increase the tuna shortage that was happening in the country.
Answer:
Jöns Jakob Berzellus _
<u>Invented the chemical notation system</u>
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Explanation:
Meaning of chemical notation : It is the representation of chemical composition of element by symbols.
Berzelius was the first person to measure accurate atomic weight of the elements, which helped to confirm Dalton's Atomic Theory.
He described how chemical bonds are formed by electrostatic attraction.
Berzelius, work with atomic weight and his theory of electrochemical dualism led to the development of<u> Chemical notation that decide the chemical notation</u> of the compounds.This chemical notation determines about the element both qualitatively and quantitatively.
He identified that compounds can be distinguished by the opposing constituents which are the acidic constituent , the basic and the neutral part.
This formula representation is given by Berzelius.
Answer:
a) 7
b) 4
c) 1
d) 4
Explanation:
Significant figures:
All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
Zero between the non zero digits are consider significant like 104 consist of three significant figures.
The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
A) 34.50698 g
In this measurement there are 7 significant figures.
B) 30.00 mL
There are 4 significant figures.
c) 0.0008 g
There is only one significant figure which is 8.
d) 125.0 °C
There are 4 significant figures.