3 years ago

ASAP!

Chemistry

1 answer:

Sav [38]3 years ago

4 0

When a radioactive isotope releases an alpha particle, the atomic number of the atom is decreased by four.

So, the correct answer is B.

Hope this helps,

Davinia.

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Answer:At $237.57^oC$ food will cook in the pressure cooker set on high.

Explanation:

Standard atmospheric pressure $P_1$ = 14.7 Psi = 1.0001 atm (1 Psi=0.06804 atm)

Standard temperature $T_1$ = 273.15 K

Highest pressure offered by pressure cooker: 12.8 Psi = 0.8709 atm

Pressure ( $P_2$ ) inside the pressure cooker on the highest setting at temperature $T_2$ :

$P_2$ = 1.0001 atm + 0.8709 atm = 1.8710 atm

According to Gay lussac law :

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$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

$T_2=\frac{P_2\times T_1}{P_1}=\frac{1.8710 atm\times 273.15 K}{1.0001 atm}=510.73 K= 237.57^oC (T(^oC)=T-273.15 K)$

At $237.57^oC$ food will cook in the pressure cooker set on high.

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