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tino4ka555 [31]
3 years ago
12

HELP ME THIS IS DUE TODAY PLEAS HELP SO I DONT FAIL

Chemistry
1 answer:
bija089 [108]3 years ago
3 0
For the first one it’s 69 just count the little lines from the side.
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Answer:

1: due to difference in reactivity and melting point

2 during the reaction both combine with oxygen in this case magnesium remain solid but some potassium vaporise

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What is more electronegative? <br> O or Br
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Answer:

O

Explanation:

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8 0
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How much silver chloride is precipitated when 25.0 g of calcium chloride and 25.0 g of silver nitrate are mixed together in a be
Burka [1]

Answer:

<u>2</u><u>1</u><u>.</u><u>0</u><u>9</u><u> </u><u>g</u><u> </u><u>of</u><u> </u><u>AgCl</u>

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Hopefully the picture is clear and the method is understandable.

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7 0
3 years ago
Ultraviolet radiation has a frequency of 6.8×1015 Hz. What is the energy associated with this frequency?
stellarik [79]

Use Planck's equation (E=hv) to solve.  where <span>frequency (v) of ultrviolet radiation is 6.8 × 1015 1/s.  </span><span> </span>The variable h is a constant equal to 6.63 × 10-34 J·s
E= <span>(6.8 × 1015 1/s)x(</span>6.63 × 10-34 J·s)


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3 years ago
A neutral atom has the following electron configuration: What is the chemical symbol for the atom? How many electrons does the a
tiny-mole [99]

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pls the image didn't come

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