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oee [108]
2 years ago
5

PLS HELP DECODE THIS The element symbol for Potassium: (B2)

Chemistry
1 answer:
Alex777 [14]2 years ago
6 0

Answer:

It the letter K

Explanation:

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Can someone help me pls
ella [17]

Answer:

B or C

Explanation:

the two maybe try it

4 0
3 years ago
Which sequence repesent matter that is losing energy
astra-53 [7]

Which sequence repesent matter that is losing energy

answer: solid liquid gas



HOPE THIS HELPS :)

5 0
3 years ago
How much heat is required to change the temperature of 100 grams of water from 25 to 55oc?
marysya [2.9K]
Hthe heat required  to change the temperfature  of 100 grams of water  from 25 to 55 c is calculated as below

Q(heat) = M(mass) x C(specific heat capacity) x delta T(change  in temperature)

M= 100 grams
C= 4.18 j/g/c
delta T= 55-25 =30c

Q=100 g x4.814 j/g/c x  30c = 12552  joules
5 0
3 years ago
What is electrophoresis? A. a technique that separates amino acids on the basis of their polarity B. a technique that separates
Vikki [24]

Answer:

A. a technique that separates amino acids on the basis of their polarity

Explanation:

8 0
3 years ago
If the change of enthalpy of this reaction when proceeding left to right is +14 kcal, which chemical equation is correct?
bagirrra123 [75]

Answer:

N₂O₄ + 14 kcal ⇄ 2NO₂.

Explanation:

Since the sign of ΔH determines either the reaction is exothermic or endothermic:

+ve, the reaction is endothermic.

-ve, the reaction is exothermic.

∵ The change of enthalpy of this reaction when proceeding left to right is + 14 kcal (+ ve sign).

∴ The reaction is endothermic, the heat is a part of the reacatnts in the reaction.

So, the reaction is:

N₂O₄ + 14 kcal ⇄ 2NO₂.

7 0
3 years ago
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