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levacccp [35]
3 years ago
14

PLEASE HELP OR EXPLAIN!!

Chemistry
1 answer:
Naddik [55]3 years ago
7 0
The third one beacuse if you count all the atoms of every one you will find that one the left side, you have 3 h and on the right you have 2 h
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How many electrons will a metal generally have in its outer energy level?
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Answer:

Metals have one or two electrons in their outermost shell

C. 1-2

Explanation:

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  • They have only one- two electrons in the outer most shell.
  • They loose these electron to form charged species called cation.

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3 years ago
Calculate the cost of gasoline for a 320 mile trip from Boston to New
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3 years ago
Given the standard heats of reaction
ANTONII [103]

Answer:

Explanation:

M(s) → M (g ) + 20.1 kJ --- ( 1 )

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M( s) + 2 X₂(g) → M X₄ (g ) - 98.7 kJ ----- ( 3 )

( 3 ) - 2 x ( 2 ) - ( 1 )

M( s) + 2 X₂(g) - 2 X₂ ( g ) - M(s)  → M X₄ (g ) - 98.7 kJ -  2 [ 2X (g ) + 327.3 kJ ] - M (g ) - 20.1 kJ

0 = M X₄ (g ) - 4 X (g ) - M (g ) - 773.4 kJ

4 X (g ) +  M (g ) =  M X₄ (g ) - 773.4kJ

heat of formation of M X₄ (g ) is - 773.4 kJ

Bond energy of one M - X bond =  773.4 / 4 =  193.4 kJ / mole

6 0
3 years ago
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vladimir1956 [14]

B. False

When the maximum amount of solute has been dissolved in a given amount of solvent, we say that the solution is saturated with solute.

3 0
3 years ago
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Which statement describes a physical change? *
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B. The surface of a silver cup turns black when it is exposed to air.
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2 years ago
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