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LenaWriter [7]
3 years ago
15

Many scientists, including Joseph Priestly, hypothesized that fuels lost mass as they burned due to the loss of a substance call

ed phlogiston. Since phlogiston was missing, these fuels could not undergo any further combustion. Which of the results in the experiment above refute this hypothesis?
a. Ethanol
b. Charcoal
c. Wood
d. Mercury
Chemistry
1 answer:
DanielleElmas [232]3 years ago
6 0
<h2>D this is a lot of hour to found but its ok thank you for sharing your question i hope this help</h2>

<h3>Carry on learning:)</h3>
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Which example is NOT a model?
lidiya [134]

Answer:

B

Explanation:

i think leter B it because

7 0
3 years ago
Read 2 more answers
PLSSS HELP FAST
Aliun [14]

Note the formula

\boxed{\sf Mass\:no=No\:of\:protons+No\:of\:neutrons}

For X:-

  • No of protons:-

\\ \sf\longmapsto 19-10=9protons

  • It is Fluorine.

For Y:-

  • No of protons:-

\\ \sf\longmapsto 16-8=8protons

  • It is Oxygen.

Option D is correct

7 0
2 years ago
the student records the concentration of the stock solution of H2O2 to be 0.950 M. The student proceeds to prepare the reaction
lana [24]

Answer:

0.0400M of KI

Explanation:

Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.

When you add 10.0 mL of 0.10M KI and 15.0mL, total volume is:

25.0mL = <em>0.025L of solution</em>

<em />

And moles of KI are:

0.0100L × 0.10M = <em>0.00100 moles of KI</em>

<em />

Thus, molarity is:

0.00100 moles / 0.025L = <em>0.0400M of KI</em>

6 0
3 years ago
Identify the element: 6 energy level, metallic, 82 election
Lady bird [3.3K]

<u>Answer</u>:-

Name of element = Lead

Symbol ♾ of Lead = Pb

Atomic no. = 82

Atomic mass = 207.2 amu

No. of protons = 82

No. of electrons = 82

Yes, lead(Pb) is a metallic element and certainly it has 6 electron shells which means 6 energy level.

If you find anything unclear you can ask me...

6 0
2 years ago
Water boils at 100⁰C. What is the temperature on the Kelvin scale?
denis23 [38]
The correct answer is D
7 0
3 years ago
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