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3 years ago

What is the atomic number of pt-175 after it undergoes alpha decay

Chemistry

1 answer:

DanielleElmas [232]3 years ago

5 0

Answer:

Explanation:

Alpha decay is one of the most basic forms of radioactive decay. It has an atomic mass of 4 and a proton number of two.

Undergoing an alpha decay will decrease the atomic mass by four and the atomic number by two.

In this particular question, we are particular about the atomic number. The atom has an atomic number of 78. So taking 2 off this gives 76

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-300g de acido comercial se disuelve en agua destilada contenidos en un cono, cuyo radio es de 0.005Km y 300cm de altura, si la

Bond [772]

Answer:

$\%m/m=76.1\%$

Explanation:

¡Hola!

En este caso, considerando la información dada, entendemos que se haría primero necesario calcular el volumen del cono en metros cúbicos, teniendo en cuenta que 0.005 km son 5 m y 300 cm son 3 m:

$V=\frac{1}{3} \pi r^2h\\\\V=\frac{1}{3} \pi *(5m)^2(3m)=78.5m^3\\\\$

Ahora, convertimos esta cantidad a gramos por medio de la densidad para conocer la masa de la solución:

$m_{sol}=78.5m^3*\frac{1.2g}{1m^3} =94.2g$

Finalmente, aplicamos la definición de %m/m para obtener:

$\%m/m=\frac{300g}{300g+94.2g}*100\%\\\\ \%m/m=76.1\%$

¡Saludos!

8 0

4 years ago

HELPPPP!!!!

UkoKoshka [18]

I believe it is mass? Since gravity tells the weight of something. If its wrong I apologize. But consider the rest focus more on speed.

3 0

3 years ago

Write the number 0.0000087 in scientific notation.

miskamm [114]

Answer:

8.7 × 10-6

Explanation:

sorry if incorrect

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What is the mass number of an atom that contains<br><br> 47 protons, 47 electrons, and 62 neutrons?

boyakko [2]

Answer:

109

Explanation:

Mass number = Protons + Neutrons

A = Z + N = 47 + 62 =109

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3 years ago

Why you share some characteristics with your mother and some with your father.

Genrish500 [490]

Answer:

Half of your fathers DNA and half of your mothers DNA are combined in you, so you will inherit some of their traits.

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