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ankoles [38]
3 years ago
7

How many valence electrons does aresenic ave.

Chemistry
1 answer:
Inessa [10]3 years ago
3 0
5 valence electrons.
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What is the main advantage of the space shuttle
Vilka [71]
<span>It is reusable.
The reusable spacecraft that transports astronauts, satellites, and other materials to and from space.
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3 0
3 years ago
A sample of wood from the remains of a ship was found to contain 40.0% of C-14 as of ordinary wood found now. If the half-life p
kondaur [170]

Answer:

7628 y

Explanation:

Carbon-14 is radioactive and it follows the first-order kinetics for a radioactive decay. The first-order kinetics may be described by the following integrated rate law:

ln(\frac{[A]_t}{[A]_o})=-kt

Here:

[A]_t is the mass, moles, molarity or percentage of the material left at some time of interest t;

[A]_o is the mass, moles, molarity or percentage of the material initially, we know that initially we expect to have 100 % of carbon-14 before it starts to decay;

k = \frac{ln(2)}{T_{\frac{1}{2}}} is the rate constant;

t is time.

The equation becomes:

ln(\frac{[A]_t}{[A]_o})=-\frac{ln(2)}{T_{\frac{1}{2}}}t

Given:

\frac{[A]_t}{[A]_o} = \frac{40.0 %}{100.0 %}

T_{\frac{1}{2}} = 5770 y

Solve for time:

t = -\frac{ln(\frac{[A]_t}{[A]_o})\cdot T_{\frac{1}{2}}}{ln(2)}

In this case:

t = -\frac{ln(\frac{40.0\%}{100.0\%})\cdot 5770 y}{ln(2)}

t = 7628 y

3 0
4 years ago
Difference between hygroscopic and deliquescent substance with of each​
iVinArrow [24]

Answer:

The water soluble substance which absorb moisture from the air and then dissolve on the absorbed moisture to change into liquid taste are called deliquescent substances whereas the substances which absorb moisture from air but do not change their state are called hygroscopic substances.

7 0
4 years ago
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3 years ago
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I think the answer is B
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