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Masteriza [31]
3 years ago
5

CAN SOMEONE HELP ME WITH THESE QUESTIONS PLEASE

Chemistry
2 answers:
Leto [7]3 years ago
6 0

Answer:what was it so I can help u do u even got the answers yet I’ll tell you I’m not going to guess

1.

Explanation:

Nostrana [21]3 years ago
5 0
What are they? .............
You might be interested in
(a) Calculate the energy released by the alpha decay of 222 86Rn.
Alinara [238K]

Answer:

a). The energy released by the alpha decay of 222 Rn is to 218 Po :

= 5.596 MeV

b).The energy of the alpha particle is 5.5 MeV

c) The recoil energy of Po = 0.096 MeV

Explanation:

The equation for the alpha decay of Rn to Polonium is:

_{86}^{222}\textrm{Rn}\rightarrow _{2}^{4}\textrm{He}+_{84}^{218}\textrm{Po}

The energy of the decay process can be calculated using:

\Delta E=\Delta mc^{2}

\Delta m = Change in the mass

Mass of Po = 218.008965 u

Mass of He = 4.002603 u

Mass of Rn = 222.017576 u

\Delta m = mass of Po + mass of He - mass of Rn

=  4.002603 + 218.008965-222.017576  

= - 0.006008

\Delta E=m(931.5MeV)

\Delta E=-0.006008\times 931.5MeV

= -5.596 MeV

<u><em>The negative sign means energy is released during the process.</em></u>

b) The energy of the alpha particle is :

\frac{Po\ mass }{Rn\ mass}\times E

\frac{218.0089}{222.0175}\times \Delta E

\frac{218.0089}{222.0175}\times 5.596

= 5.494 MeV

= 5.5 MeV

c).

Recoil energy: When the parent nucleus is at rest before the decay then , there must be the some recoil of daughter nucleus to conserve the momentum.This is termed as recoil energy.

<u><em>The energy of the recoil polonium atom :</em></u>

The formula for recoil energy is :

<em>The total energy - the kinetic energy</em>

<em>= 5.596 - 5.5 </em>

<em>= 0.096 MeV</em>

7 0
3 years ago
How long does it take long currents to complete their cycle around the world?
monitta

Answer:it takes about a day

Explanation:

7 0
3 years ago
element m is a metal and its chloride has the formula mcl2. to which group of the periodic table does m most likely belong
Triss [41]
It will belong to the metals because metals bond with nonmetals like chlorine to form ionic compounds
3 0
3 years ago
Read 2 more answers
What is the molar concentration of
Leto [7]

Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

(without rounding: 1.418531175 M)

3 0
2 years ago
What would be the electron configuration of a sulfur ion S−2?
MAVERICK [17]

It's either B or C heh

4 0
3 years ago
Read 2 more answers
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