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3 years ago

PLEASE HELP MEEEEEEEEEEEEEEEEEEE

Chemistry

2 answers:

qwelly [4]3 years ago

8 0

I think the answer is c

andriy [413]3 years ago

5 0

Silicon (Si). This is too reactive to be found in nature and is the most reactive in the list, followed by Chlorine (Cl), then Argon (Ar) then Helium (He)

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HELP ASAP 50-50 CHANCE

docker41 [41]

Answer: The answer is A, A new element or different atom formed from the original two.

Hope this helps! :D

-<em>TanqR</em>

4 0

4 years ago

All elements can be classified as metals, metalloids, or ?

svlad2 [7]

All elements can be classified as metals, metalloids, or nonmetals

5 0

4 years ago

A 200.-milliliter sample of CO2(g) is placed in a sealed, rigid cylinder with a movable piston at 296 K and 101.3 kPa. Determine

bagirrra123 [75]

Answer:

The final volume of the sample of gas $V_{2}$ = 0.000151 $m^{3}$

Explanation:

Initial volume $V_{1}$ = 200 ml = 0.0002 $m^{3}$

Initial temperature $T_{1}$ = 296 K

Initial pressure $P_{1}$ = 101.3 K pa

Final temperature $T_{2}$ = 336 K

Final pressure $P_{2}$ = K pa

Relation between P , V & T is given by

$P_{1} \frac{V_{1} }{T_{1} } = P_{2} \frac{V_{2} }{T_{2} }$

Put all the values in the above equation we get

$101.3 (\frac{0.0002}{296} )= 152 (\frac{V_{2} }{336} )$

$V_{2}$ = 0.000151 $m^{3}$

This is the final volume of the sample of gas.

4 0

4 years ago

Based on their activation energies and energy changes and assuming that all collision factors are the same, which of the followi

babymother [125]

b is fastest, having the lowest activation energy (35 kJ) and is an exothermic reaction, releasing energy in the form of heat

c is slowest, having the highest activation energy (55 kJ) and is an endothermic reaction, taking in energy from its surroundings

5 0

3 years ago

PLEASE HELP ASAP!! I really don't understand....

12345 [234]

Its 700 J! I just took the test so yeah.... :)

3 0

3 years ago

Read 2 more answers