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blagie [28]
3 years ago
7

For the following reaction, provide the missing information

Chemistry
1 answer:
jenyasd209 [6]3 years ago
8 0

Answer:

19. Option B. ⁰₋₁B

20. Option D. ²¹⁰₈₄Po

Explanation:

19. ²²⁸₈₈Ra —> ²²⁸₈₉Ac + ʸₓZ

Thus, we can determine ʸₓZ as follow:

228 = 228 + y

Collect like terms

228 – 228 = y

y = 0

88 = 89 + x

Collect like terms

88 – 89 = x

x = –1

Thus,

ʸ ₓZ => ⁰₋₁Z => ⁰₋₁B

²²⁸₈₈Ra —> ²²⁸₈₉Ac + ʸₓZ

²²⁸₈₈Ra —> ²²⁸₈₉Ac + ⁰₋₁B

20. ᵘᵥX —> ²⁰⁶₈₂Pb + ⁴₂He

Thus, we can determine ᵘᵥX as follow:

u = 206 + 4

u = 210

v = 82 + 2

v = 84

Thus,

ᵘᵥX => ²¹⁰₈₄X => ²¹⁰₈₄Po

ᵘᵥX —> ²⁰⁶₈₂Pb + ⁴₂He

²¹⁰₈₄Po —> ²⁰⁶₈₂Pb + ⁴₂He

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It takes 90 N of force to lift a box of books off my smiths table. If you can only leave the box 25% of the way up, how many new
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2 years ago
The teacher tells your group to make a stock solution of sodium chloride, and then diluting it to
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The idea here is that you need to figure out how many moles of magnesium chloride,

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c

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c

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n

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⇒

n

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n

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⋅

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10

−

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=

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3 0
2 years ago
Which relationship can be used to aid in the determination of the heat absorbed by bomb calorimeter? 
NARA [144]

Answer:

ΔH = q_{p}

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q_{com} = q_{p}

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q_{p} = the internal heat gained by the whole calorimeter mass system, which is the water, as well as the calorimeter itself.

q_{com}  = the heat of combustion

Also, we know that the total heat change of the any system is

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ΔH = the total heat absorbed by the system

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ΔW = work done on the system due to a change in volume. Since the volume of the calorimeter system does not change, then ΔW = 0

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5 0
3 years ago
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