All categories

3 days ago

Compare and contrast these isotopes: uranium -239, uranium -238, and uranium -235

2 answers:

4 0

Each isotope contains an identical number of protons and electrons, but they vary in neutron count, making them isotopes.

VMariaS [2.8K]3 days ago

3 0

Response: They possess the same quantity of protons but vary in their number of neutrons.

Clarification:

Isotopes consist of atoms with an equal number of protons but differing neutron counts.

Uranium occupies the 92nd position in the periodic table.

The atomic numberindicates the number of protons present in an atom.

Atomic number = Number of protons

Mass numberrepresents the total of protons and neutrons found in an atom.

Mass number = Number of protons + Number of neutrons

For the isotopes mentioned: $_{92}^{239}\textrm{U},_{92}^{238}\textrm{U}\text{ and }_{92}^{235}\textrm{U}$

For $_{92}^{239}\textrm{U}$

Protons = 92

Neutrons = 239 - 92 = 147

For $_{92}^{238}\textrm{U}$

Protons = 92

Neutrons = 238 - 92 = 146

For $_{92}^{235}\textrm{U}$

Protons = 92

Neutrons = 235 - 92 = 143

Thus, they share the same number of protons but vary in their neutron counts.

You might be interested in

Modern commercial airliners are largely made of aluminum, a light and strong metal. But the fact that aluminum is cheap enough t

lorasvet [2668]

Respuesta:

Un avión fabricado con aluminio puede transportar una mayor cantidad de pasajeros comparado con uno de acero.

Explicación:

La masa total que el avión es capaz de levantar es:

$m_{tot}=m_{fuselage}+m_{passangers}$

Para el aluminio:

$m_{tot}=m_{fus-Al}+m_{pas-Al}$

$m_{fus-Al}=\delta _{Al}*V_{fuselage}$

$V_{fuselage}=\frac{\pi *L}{4}*[D^2-(D-e)^2]$

donde:

L es longitud
D es diámetro
e es grosor

$m_{tot}=\delta _{Al}*\frac{\pi *L}{4}*[D^2-(D-e)^2]+m_{pas-Al}$

Para el acero (mismo procedimiento):

$m_{tot}=\delta _{Steel}*\frac{\pi *L}{4}*[D^2-(D-e)^2]+m_{pas-Steel$

Sabiendo que la masa total que el avión puede levantar es constante y que el aluminio tiene una densidad menor que la del acero, podemos afirmar que el avión de aluminio puede levantar un mayor número de pasajeros.

También es posible estimar un peso promedio de los pasajeros para calcular cuántos podría soportar.

5 0

1 month ago

Hydrogen gas has a density of 0.090 g/L, and at normal pressure and -1.72 C one mole of it takes up 22.4 L. How would you calcul

Anarel [2728]

Answer:

$n= \frac{m}{ \rho }* \frac{1 mol}{22.4 L}$

Explanation:

Assuming all calculations occur at standard pressure and a temperature of -1.72°C :

$n= \frac{m}{ \rho }* \frac{1 mol}{22.4 L}$

Where

$n$ is the number of moles of hydrogen

$n$ is the mass of hydrogen

$\rho$ is the density of hydrogen

6 0

1 month ago

Read 2 more answers

Determine the pH of a solution that is 0.15 M HClO2 (Ka = 1.1 x 10-2) and 0.15 M HClO (Ka = 2.9 × 10-8).

Tems11 [2638]

The pH level is 1.39. To explain, we start with the given information: the concentration of HClO is 0.15 M, with an acid dissociation constant of 2.9 × 10-8. The objective is to calculate the pH of the solution. Through the process, we find that the equilibrium concentration after applying the formula yields 0.04069 M for H3O⁺, leading us to a pH of 1.39.

4 0

24 days ago

How many grams of mercury are present in a barometer that holds 6.5mL of mercury? ...?

alisha [2865]

<span>13.6
grams of mercury are present in a barometer that holds
per milliliter.
13.6*6.5 = 88.4</span>

3 0

1 month ago

Read 2 more answers

Neither dry soil nor pure water conducts electricity. But wet soil will conduct electricity. Explain why this happens?

Alekssandra [2904]

Pure water lacks sufficient ions to conduct electricity. However, when metals like iron, zinc, and copper are present in moist soil, they can instigate electrolysis, which necessitates excess energy due to limited water's self-ionization. Consequently, wet soil can carry current as long as there are positive and negative ions. Water ions travel from the anode (positive side) to the cathode (negative side) to be oxidized and generate electricity.

4 0

15 days ago