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dexar [7]
3 years ago
10

The time needed for a radioactive sample to decay to one-half of its original activity is called the ________.

Chemistry
1 answer:
belka [17]3 years ago
3 0
The half life is the time needed.
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What would happen if a neutron was added to Lithium (7)
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Answer:

if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8

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3 years ago
This chemical equation represents the burning of methane, but the equation is incomplete. What is the missing coefficient in bot
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CH4+(x)O2=CO2 +(Y)H2O
C=1 +H=4 +O=? = C=1 +O=2+? +H=?
H=4>>Y=2
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C=1 +H=4 +O=4 = C=1 +O=4 +H=4
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6 0
3 years ago
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Which of the following measurements is equal to 150dL
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3 years ago
How many oxygen (O) atoms are involved in this chemical reaction?<br><br> 2Fe(OH)3 — Fe2O3 + 3H20
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6 oxygen atoms

Explanation:

From the equation,

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

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Since the number of oxygen participating in the reaction is independent on the product (not a reversible reaction) then the total number of oxygen atoms participating in the reaction is 6

7 0
3 years ago
When heat energy is removed, two changes are observed:
harkovskaia [24]

Answer: Option (A) is the correct answer.

Explanation:

Condensation is defined as the process in which vapors or gaseous phase changes into liquid phase.

Freezing is the process in which liquid phase changes into solid phase.

Evaporation is the process in which liquid phase changes into vapors or gaseous phase.

Melting is the process in which solid phase changes into liquid phase.

Therefore, we can conclude that names for given phase changes A and B is that A is condensation and B is freezing.

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3 years ago
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