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never [62]
3 years ago
13

Which actions are part of a system of methodical tests and refinements specific to technological design? 1 documenting, tinkerin

g, testing 2 tinkering, presenting, testing 3 testing, documenting, pr esenting 4 presenting, tinkering, testing
Chemistry
1 answer:
telo118 [61]3 years ago
6 0

Answer:

1. documenting, tinkering, testing

Explanation:

Technological design is defined as the process of study, design and development of new technologies.

There are some action in the methodical tests and refinements specific to technological design include documenting, tinkering, testing.

<u>Documenting </u><u>includes collecting all the information about the design and develop the product, </u><u>tinkering</u><u> involves repairing or adjust the issues found in the development, and </u><u>testing </u><u>helps to evaluate if the product is ready to work as it is supposed to.</u>

Hence, the correct answer is "1."

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If a sample of pure calcium 9Ca) contains 4.69 x 1022 atoms of iodine, there are 0.0779 moles of calcium in the sample. The correct answer will be A. 
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3 years ago
If 6.49 mol of ethane (C2H6) undergo combustion according to the unbalanced equation
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Answer:

22.715 moles of oxygen are used

Explanation:

Given data:

Number of moles of ethane = 6.49 mol

Number of moles of O₂ required = ?

Solution:

Chemical equation:

2C₂H₆ + 7O₂       →     4CO₂ + 6H₂O

Now we will compare the moles of oxygen with ethane.

                    C₂H₆           :           O₂  

                       2              :             7

                     6.49           :           7/2×6.49 = 22.715 mol

Thus, 22.715 moles of oxygen are used.

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3 years ago
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Explanation:

Hope this helps :)

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3 years ago
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