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Stella [2.4K]
3 years ago
14

How much time would it take for 9000 atoms of nobellium-253 (half-life is 97 s) to decay to 2250 atoms?

Chemistry
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Answer:it’s 828292atoms

Explanation

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I’m positive it’s gonna be c
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3 years ago
What two general products do combustion reactions create? *
Dimas [21]
It would be carbon dioxide and water.

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3 years ago
Calculate the total energy, in kilojoules, that is needed to turn a 46 g block
neonofarm [45]

Answer: The total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.

Explanation:

Given: Mass = 46 g

Initial temperature = -25^{o}C

Final temperature = 100^{o}C

Specific heat capacity of ice = 2.05 J/g^{o}C

Formula used to calculate the energy is as follows.

q = m \times C \times (T_{2} - T_{1})

where,

q = heat energy

m = mass

C = specific heat capacity

T_{1} = initial temperature

T_{2} = final temperature

Substitute the values into above formula as follows.

q = m \times C \times (T_{2} - T_{1})\\= 46 g \times 2.05 J/g^{o}C \times (100 - (-25))^{o}C\\= 11787.5 J (1 J = 0.001 kJ)\\= 11.787 kJ

Thus, we can conclude that the total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.

7 0
3 years ago
Question 8
melamori03 [73]

Answer:

Fluorine has an electronegativity of 4, which is the highest an element has. Makes it a pretty dangerous substance to work with

8 0
3 years ago
What is meant by a “ chain reaction “ ?
lilavasa [31]

Answer:

a chemical reaction or other process in which the products themselves promote or spread the reaction, which under certain conditions may accelerate dramatically.

Explanation:

the self-sustaining fission reaction spread by neutrons which occurs in nuclear reactors and bombs.

a series of events, each caused by the previous one.

5 0
3 years ago
Read 2 more answers
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