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3 years ago

WILL GIVE BRAINLIEST TO CORRECT ANSWER QUESTION IS IN PICTURE

Chemistry

2 answers:

Sliva [168]3 years ago

5 0

Answer:

A - Add Catalyst

Explanation:

add caralyst

saul85 [17]3 years ago

4 0

B
When decreasing the main formula you will have a decrease in the answer

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Which factor impacts the possible number of ways in which different atoms can be put together?

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Nitrogen Trichloride

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A wooden artifact from a Chinese temple has a 14C activity of 42.8 counts per minute as compared with an activity of 58.2 counts

Arlecino [84]

Answer : The age of the artifact is, $2.54\times 10^3\text{ years}$

Explanation :

Half-life = 5715 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5715\text{ years}}$

$k=1.21\times 10^{-4}\text{ years}^{-1}$

Now we have to calculate the time taken to decay.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = time taken by sample = ?

a = initial activity of the reactant = 58.2 counts per minute

a - x = activity left after decay process = 42.8 counts per minute

Now put all the given values in above equation, we get

$t=\frac{2.303}{1.21\times 10^{-4}}\log\frac{58.2}{42.8}$

$t=2540.5\text{ years}=2.54\times 10^3\text{ years}$

Therefore, the age of the artifact is, $2.54\times 10^3\text{ years}$

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3 years ago

What happens when an electron absorbs energy?

qaws [65]

Answer:

Explanation:

this is because the electrons are attracted to the protons, the stronger the attraction and energy level the closer the electrons are to the nucleus. this moves them to a higher energy orbital. For example in a Bohr diagram.

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3 years ago

Can someone please help me with this?--20 pts!

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Answer:

Compound B is ionic. The electronegativity difference is 2.2, which can be determined by subtracting the electronegativity of Element Y from that of Element Z. Electronegativity differences greater than 1.7 indicate ionic bonds.

Hope that helps.

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3 years ago

*WILL GIVE BRAINLIEST TO CORRECT ANSWER * **QUESTION IS IN PICTURE**

WILL GIVE BRAINLIEST TO CORRECT ANSWER QUESTION IS IN PICTURE