All categories

3 years ago

PLEASE SOMEBODY HELP PLEASE ! I WILL MARK BRAINLY I PROMISE !

Chemistry

1 answer:

IgorLugansk [536]3 years ago

5 0

A. your reactants are on the left of the arrow.
B. your products are on the left of the arrow.
C.its read as a yeild sign.
D.the s means it's a soild and the g means it's a gas.

You might be interested in

Which is the best example of how electromagnetic energy is used in everyday life?

Sever21 [200]

A patient receiving an X-ray in a hospital

4 0

3 years ago

If 27.3% of a sample of silver-112 decays in 1.52 hours, what is the half-life (in hours to 3 decimal places)?

ICE Princess25 [194]

<u>Answer:</u> The half life of the sample of silver-112 is 3.303 hours.

<u>Explanation:</u>

All radioactive decay processes undergoes first order reaction.

To calculate the rate constant for first order reaction, we use the integrated rate law equation for first order, which is:

$k=\frac{2.303}{t}\log \frac{[A_o]}{[A]}$

where,

k = rate constant = ?

t = time taken = 1.52 hrs

$[A_o]$ = Initial concentration of reactant = 100 g

[A] = Concentration of reactant left after time 't' = [100 - 27.3] = 72.7 g

Putting values in above equation, we get:

$k=\frac{2.303}{1.52hrs}\log \frac{100}{72.7}\\\\k= 0.2098hr^{-1}$

To calculate the half life period of first order reaction, we use the equation:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life period of first order reaction = ?

k = rate constant = $0.2098hr^{-1}$

Putting values in above equation, we get:

$t_{1/2}=\frac{0.693}{0.2098hr^{-1}}\\\\t_{1/2}=3.303hrs$

Hence, the half life of the sample of silver-112 is 3.303 hours.

6 0

3 years ago

Correction?

rjkz [21]

Your answer is correct.

MgO(s) + H2O(l) ----> Mg(OH)2(aq)

:-) ;-)

5 0

3 years ago

Read 2 more answers

How do you get from mass to moles in this problem?

Zinaida [17]

Answer:

what problem?

8 0

3 years ago

If a decrease in temperature accompanies a reaction, what occurred?

Sliva [168]

Answer:

Energy was released

Explanation:

Decrease in temperature means less energy, but the energy had to have been transferred because energy can't be destroyed or created. So if the temp. went down, energy must have been lost. (If it had been absorbed, the temp. would have gone up)

3 0

2 years ago

Read 2 more answers