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butalik [34]
2 years ago
11

How did we measure the production of oxygen in photosynthesis in this experiment Mosa Mack lesson 2

Chemistry
1 answer:
jok3333 [9.3K]2 years ago
6 0

Answer:

If the discs floated, they produced oxygen and gained buoyancy.

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How many significant figures the measurement have 56.0g 0.0004m 1003ml 0.0350s
Setler [38]
In order to do this, we have to first know the significant figure rules.
<span>Rule #1: All non-zero digits are significant. (1234)
 Rule #2: Zeros in front of a number are not significant. (0.093)
 Rule #3: Zeros between non-zero digits are significant. (78309)
 Rule #4: Zeros at the end of a number are significant if there is a decimal point in the number. (0.05470)

So by going by the rules, 56.0g has three sig figs, because there is a decimal point.
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And lastly, 0.0350s has 3 sig figs because the number after a decimal point counts.

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How many moles are contained in 3.131 × 1024 particles?
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One mole contains 6.02×10²³
If x mole contains 3.131×10²⁴

x = 3.131×10²⁴
-------------
6.02×10²³

x = 0.52×10²⁴¯²³

x = 0.52×10¹

x = 5.2moles....

Hope this helped...?
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3 years ago
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galina1969 [7]

Answer:

Mercury

Explanation: Under standard conditions mercury is a shiny, heavy, silvery liquid. It is the only metal that is liquid at room temperature.

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3 years ago
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