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Jet001 [13]
3 years ago
6

What is it ? Multiple choice

Chemistry
2 answers:
maxonik [38]3 years ago
5 0
Your answer would be C because the fire gave the marshmellow a brown crust shwoing effect. 
VikaD [51]3 years ago
5 0
C! When an object changes colour it usually is caused by a chemical change :)
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3 years ago
How do organisms that are not autotrophs get they energy they need to sustain life
polet [3.4K]
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Hope that answered your question.
8 0
3 years ago
How do you expect the water level to change when the apparatus is placed in warm water? In cool water?
wlad13 [49]
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6 0
3 years ago
Silver has two naturally isotopes and has an atomic mass of 107.868 amu. One isotope is Ag-109 isotope (108.905 amu) and has a n
Triss [41]

Answer:  106.905

Explanation:  If there are only 2 isotopes, and 1 of them is 48.16%, the second must, by default, be (100 - 48.16%) = 51.84%  The final, averaged, atomic mass is 107.868.  This is made up of each isotope's atomic mass times the percentage of that isotope in the total sample.  The weighted value of the known isotope (109) plus that of the unknown must come to the observed value of 107.868 amu.  (107.868 - 52.45 = 55.42).  Divide that by the % for that isotope (55.42/0.5184) = 106.90 amu for the second isotope.

<u>Atomic Mass</u>  <u>% of Sample</u> <u>Weighted Value</u>

    108.905         48.16%              52.45

          X               51.84%              <u>55.42</u>

                                                     107.87

      X = (55.42/0.5184) = 106.90 amu

5 0
3 years ago
Calculate the average kinetic energies of CH4g and N2 g molecules at 273 K and 546K
kaheart [24]

Answer:

Average kinetic energy of gases, which is derived from the RMS (root mean square speed) and KE equation, can be solved as:

It appears that the average KE of gases is dependent on the temperature which means that all gases will have the same KE as long the temperature is the same

7 0
3 years ago
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