an electric field of 2.00 kv/m and a magnetic field of 0.580 t act on a moving electron to produce no net force. if the fields are perpendicular to each other, what is the electron's speed?

The temperature of 1.2 moles of Helium gas at 1950 mm Hg if it occupies 15,500 ml of volume is 131°C.

We know we want to use the ideal gas law because we have the moles, pressure, and volume and we want to get the pressure: PV = nRT, where P = pressure, V = volume, n = number of moles, R = gas constant, and T = Kelvin temperature.

Here, the following values are given: 1950 mmHg of pressure, 15,500 mL (15.5 L), 1.2 mol of material, and R = 62.3638 (according to a table of gas constants). To the equation, include these:

Solve for temperature as follows: (1950) x (15.5 L) = (1.2) x (62.3638) x Temperature Temperature = 403.88 K.

We can convert this to degrees Celsius by subtracting 273 from the total:

3 sig figs = 403.88 - 273 = 130.88 - 131 (3 sig figs)

This causes the temperature to be 131°C.

learn more about Helium gas here:

https://brainly.com/question/21800448

#SPJ1

In terms of political history, some states in the United States have longer and richer histories than others. The states with the longest political histories are those that were among the original thirteen colonies that declared independence from Great Britain in 1776.

These states have a political history that dates back to the colonial period, during which time they were governed by British colonial authorities. Many of these states played a key role in the American Revolution and the founding of the United States.

For example, Massachusetts was the site of the Boston Tea Party and the birthplace of the American Revolution, while Virginia was home to many of the country's founding fathers, including George Washington and Thomas Jefferson.
Other states with notable political histories include California, Texas, and Illinois.

California played a key role in the Civil Rights Movement and the counterculture movement of the 1960s, while Texas was the site of the famous battle of the Alamo and played a key role in the development of the oil industry. Illinois was home to Abraham Lincoln, one of the most important political figures in United States history.

In conclusion, the states with the longest political histories are those that were among the original thirteen colonies, but other states such as California, Texas, and Illinois have also made significant contributions to the political history of the United States.

To know more about political histories  refer here

https://brainly.com/question/12443795#

#SPJ11

For a liter of a buffer that is 1. 5 m in acetic acid and 0. 70 m in sodium acetate, and with a  result in a buffer pH of 4.01, the moles of HCl required is mathematically given as x=0.313mol

Generally, the equation for the pH   is mathematically given as

pH=pKa+logsalt/acid

Generally, the equation for the Chemical Reaction   is mathematically given as

HCl+CH3CooNa---->NaCl+CH3OOH

Therefore

4.01=4.74+log\frac{0.8-x}{1.3+x}

-0.52=log\frac{0.8-x}{1.3+x}

x=0.313mol

In conclusion, The moles of HCl required is

x=0.313mol

Read more about Chemical Reaction

https://brainly.com/question/6876669

Buffer is a solution that prevents pH variation in a solution when base or acid is added. In a liter of buffer 0.313 mol of hydrochloric acid must be added.

pH is the potential of hydrogen and is given as,

\(\rm pH =\rm pKa + log \dfrac{salt}{acid}\)

The chemical reaction is given as,

\(\rm HCl+CH_{3}COONa \rightarrow NaCl+CH_{3}OOH\)

Given,

pH =4.01

pKa = 4.74

Concentration of salt = 0.8 - x

Concentration of acid = 1.3 + x

Substituting values in the pH formula:

\(\begin{aligned} 4.01 &= 4.74 + \rm log \dfrac{(0.8 - x)}{ (1.3 + x)}\\\\-0.52 &= \rm log \dfrac{(0.8 - x)}{ (1.3 + x)}\\\\&= 0.313 \;\rm mol\end{aligned}\)

Therefore, 0.313 moles of HCl are needed.

Learn more about buffers here:

https://brainly.com/question/9875355

#SPJ4

21. You can clearly observe the sun directly above you at Point A.

22. It will generally be warmer at the equator (Point B) compared to higher altitudes (Point A) due to the direct overhead position of the sun and the higher intensity of solar radiation.

23. The air in the equatorial region will move towards the West (not North or South). This movement is known as the trade winds.

24. The air from the North of the equator will generally move towards the South, forming the prevailing winds known as the westerlies.

25. The air from the South of the Equator will generally move towards the North, also forming the prevailing winds known as the westerlies.

26. The place where winds in the tropics meet or converge is called the Inter-Tropical Convergence Zone (ITCZ).

27. Based on the given information, the occurrence of the ITCZ is depicted as a band where the winds from the Northern and Southern hemispheres converge around the equatorial region.

28. Winds blow from high pressure areas to low pressure areas.

29. The effects of monsoons in Abu Dhabi may include increased rainfall, changes in wind patterns, potential flooding, and impacts on agricultural activities.

Effects of Monsoon on:

31. Fish pen owner: The increased rainfall from monsoons can provide more water for fish pens, potentially improving conditions for fish growth and production.

32. Farmers: Monsoons bring crucial rainfall for agricultural activities, aiding in crop growth and irrigation.

33. Public consumer of water: Monsoons contribute to replenishing water sources such as reservoirs, rivers, and groundwater, ensuring a sufficient water supply for public consumption.

34. Fisher folks: Monsoons can affect fishing activities, as changes in water currents and conditions may impact fish migration patterns and fishing opportunities.

Learn more about equator, here:

https://brainly.com/question/32442743

#SPJ1

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass = 324 g

volume = 40.8 cm³

We have

\(density = \frac{324}{40.8} \\ = 7.941176...\)

We have the final answer as

Hope this helps you

Answer: volume of gas at 175°C = 18.10mL.

Given :

• Temperature (T1 = 175°C

• Volume (V1 ) = 132 mL

• Temperature (T2) = 24 °C

• Volume 2 = ....mL?

We will consider Charles law "volume of an ideal gas at constant pressure is directly proportional to the absolute temperature"

• Represented as :

Replacing the given parameters into chales law equation , we get that V2 =

This means that the volume of gas at 175 = 18.10mL.

No, this is not true. Van der Waals bonding does have an influence on the properties of a material.

While Van der Waals bonds are much weaker than other types of bonding, they can still affect properties such as surface tension, malleability, and ductility. Additionally, these bonds may be used to increase the overall strength of a material by increasing the number of intermolecular bonds.

Van der Waals bonding, also known as London dispersion forces, occurs between molecules as a result of temporary dipoles. These temporary dipoles form when electrons are unequally distributed across molecules, which causes an imbalance of electrical charge.

This imbalance can cause the molecules to attract each other and form Van der Waals bonds.

To learn more about Van der Waals bonding refer -  https://brainly.com/question/13201335

#SPJ11

Answer:

The statement that is true is:

II. Scientific explanations should be based on evidence or data.

                                                                                     ~Lylliara Jackson~

The amount of chemical product, y, at a distance of x = 1 is given by y = -ln(-(1/2) ln|3| + C3), where C3 is a constant.

The given differential equation is dx/dy = e^(-y)(2x+1), where y represents the amount of chemical product and x represents the length across the reactor.

i. To find the particular solution for y, we need to solve the given differential equation. Let's separate the variables and integrate both sides with respect to x and y.

dx/(2x+1) = e^(-y) dy

Integrating both sides, we get:

∫ dx/(2x+1) = ∫ e^(-y) dy

To integrate the left side, we can use the substitution u = 2x+1. This gives us du = 2dx, which implies dx = du/2.

∫ dx/(2x+1) = ∫ (1/u) (du/2)

= (1/2) ∫ du/u

= (1/2) ln|u| + C1, where C1 is the constant of integration.

= (1/2) ln|2x+1| + C1

Integrating the right side:

∫ e^(-y) dy = -e^(-y) + C2, where C2 is the constant of integration.

Now, equating both sides and simplifying:

(1/2) ln|2x+1| + C1 = -e^(-y) + C2

Rearranging the terms:

e^(-y) = -(1/2) ln|2x+1| + C3, where C3 = C2 - C1.

Taking the natural logarithm of both sides:

-y = ln(-(1/2) ln|2x+1| + C3)

y = -ln(-(1/2) ln|2x+1| + C3), where C3 is a constant.

ii. To find the amount of chemical product, y, at a distance of x = 1, we substitute x = 1 into the particular solution obtained in part i.

y = -ln(-(1/2) ln|2(1)+1| + C3)

Simplifying further:

y = -ln(-(1/2) ln|3| + C3)

Learn more about differential equations from the given link:

brainly.com/question/1164377

#SPJ11

Given :

• Molar mass of FeBr3 = 295.56 g/mol

• Mass of FeBr3 = 449 g

The balanced reaction is given as :

by stoichiometry , we can see that :

• 2 moles of FeBr3 produces 1 moles of Fe2S3

Therefore ;

• 1.52 mol of febr3 produces X Fe2S3

• X moles of FE2S3, = (1.52moles FeBr3 * 1 mol Fe2S3) /2 moles

FeBr3.

=0.755 moles

≈0.76 moles

• This means that 0.76 moles of Fe2S3 would be produced from the complete reaction of 449 g iron(III)bromide,

Answer:

ammonia molecules. Similar factors may be derived for any pair of substances in any chemical equation. Example 4.8. Moles of Reactant Required in a Reaction.

Explanation:

Explanation:

CO2 is called as gas because it exist in single thermodynamics state i.e CO exist in gases state only at room temperature.

When red blood cells are placed in Solution A, which contains 150 mM NaCl, no significant changes occur because the concentration of sodium chloride is similar to that of the cells' internal environment. The isotonic nature of Solution A ensures that there is no net movement of water across the cell membrane, resulting in the cells maintaining their normal shape and size.

However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, differences arise. Tonicity refers to the osmotic pressure exerted by a solution on a cell and is influenced by the concentration of solutes within the solution. Solutions B and E both contain additional solutes along with NaCl.

Solution B, consisting of 100 mM glucose and 100 mM NaCl, has a higher tonicity compared to Solution A. Glucose cannot freely cross the cell membrane, creating an osmotic gradient that draws water into the red blood cells, causing them to swell.

Solution C contains 100 mM Drug X, a small non-polar molecule, along with 150 mM NaCl. Since Drug X is non-polar, it can freely cross the cell membrane. The presence of Drug X does not significantly affect the tonicity compared to Solution A, as it does not create an osmotic gradient.

In contrast, Solution D, which contains 150 mM MgCl2, has a higher tonicity than Solution A. MgCl2 dissociates into Mg2+ and Cl- ions, both of which cannot cross the cell membrane easily. The higher concentration of impermeable ions creates an osmotic gradient, leading to water loss from the red blood cells and causing them to shrink.

Lastly, Solution E consisting of 300 mM fructose has a higher tonicity compared to Solution A. Fructose cannot freely cross the cell membrane, resulting in an osmotic gradient that draws water into the red blood cells, causing them to swell.

In summary, placing red blood cells in Solution A does not produce significant changes in the cells. However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, variations in osmotic pressure occur due to the presence of different solutes.

Learn more about red blood cells

brainly.com/question/12265786

#SPJ11

Answer:

the heat differs to the air as heat is energy and energy likes to travel

The outlet stream leaving the bed of a cation-exchange resin will contain \(H^+\)and. \(CO_3^-^2\)

What is Cation-exchange resin?

To learn more about cation-exchange resin with the given link

brainly.com/question/21052225

#SPJ4

Concentrated sufuric acid has a concentration of 18. 4 M. 1 mL of concentrated sulfuric acid is added to 99 mL of a solution. 5.5 is the resulting pH of that solution.

It is a scale used to describe how basic or how acidic an aqueous solution is. When compared to basic or alkaline solutions, acidic solutions—those with greater hydrogen (H+) ion concentrations—are measured to have lower pH values. The pH scale is logarithmic and shows the activity of hydrogen ions (in the solution) in the opposite direction.

Molarity₁×Volume₁=Molarity₂×Volume₂

18. 4 ×1=Molarity₂×99

Molarity₂= 0.18M

pH = -log[ 0.18M]  

      =5.5

To know more about pH, here:

https://brainly.com/question/2288405

#SPJ1

Answer: Green.

Explanation: Because object appears to be blue in sunlight, it absorbs counter colour of blue, also orange-red colour. So, when illuminated with

red-green colour, red light is more absorbed and object appears to be green.

Answer:

Closed-toe shoes, long pants, a lab coat, safety glasses with side shields or splash goggles, and gloves.

Explanation:

Answer:

Explanation:

Arsenic is the the metalloid which has "five valence electrons" in the "fourth electron shell". Explanation: Metalloids are found between the metals and non-metals in the periodic table.

hope it helps

We structure the Lewis points and outline the forms of the following elements:

For a. SeCl4, the Lewis dot structure is:

  Se | Cl

= Cl | Cl

It has a tetrahedral shape with Se as the central atom.

For b. I3-, the Lewis dot structure is:

  I |

- I | I

It has a trigonal planar shape with I as the central atom.

For c. PSCl3, the Lewis dot structure is :

P | Cl

- - Cl | Cl Cl

It has a trigonal pyramidal shape with P as the central atom.

For d. IF4-, the Lewis dot structure is :

I | F

- - F | F F

It has a square planar shape with I as the central atom.

For e. PH2-, the Lewis dot structure is :

P | H

- H | H

It has a bent shape with P as the central atom.

For f. TeF42-, the Lewis dot structure is :

Te | F

- - F | F F

It has an octahedral shape with Te as the central atom.

For g. N3-, the Lewis dot structure is:

N |

- N | N

It has a linear shape with N as the central atom.

For h. SeOCl4, the Lewis dot structure is:

Se | O | Cl

- - - Cl | Cl Cl

It has a tetrahedral shape with Se as the central atom.

For i. PH4+, the Lewis dot structure is:

P | H

- H | H H | H

It has a tetrahedral shape with P as the central atom.

Learn more about lewis structures:

https://brainly.com/question/20300458

#SPJ4

Answer:

a is true

Explanation:

homogeneous mixtures are mixtures of 2 or more substances that are even throughout ,heterogeneous are mixtures that aren't uniform and can be put back to different parts

In each pair, the isotope with a higher neutron-to-proton ratio or odd number of neutrons is less stable and more likely to undergo nuclear decay.

The stability of an isotope depends on its neutron-to-proton ratio, with more stable isotopes having a more balanced ratio. In general, isotopes that have a significant deviation from the stable neutron-to-proton ratio of about 1:1 are less stable and more likely to undergo nuclear decay.

Using this information, we can predict which isotope is less stable in each pair:

1. 9/3Li is less stable than 6/3Li because it has a neutron-to-proton ratio that is farther from the stable ratio of 1:1. This makes it more likely to undergo nuclear decay.

2. 25/11Na is less stable than 23/11Na because it has a higher neutron-to-proton ratio, which makes it less stable and more likely to undergo nuclear decay.

3. 48/21Sc is less stable than 48/20Ca because it has an odd number of neutrons, which makes it less stable than even-even isotopes. This makes it more likely to undergo nuclear decay. 48/20Ca is a doubly magic isotope with a very stable neutron-to-proton ratio and is therefore considered one of the most stable isotopes.

Visit to know more about Isotopes:-

brainly.com/question/13604636

#SPJ11

Answer:

A

Explanation:

Question:

Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?

Options:

Answer:

A.) The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.

Explanation:

I just did the test on edge 2020 and got it right!

Answer:

The answer to this is A. One kind of atom

Explanation:

The other options make no sense whatsoever. But enjoy.

I hope this helped.

Answer:

A. One kind of atom

Explanation:

Answer:

A and D

Explanation:

I took the test, and choose both B and C and got it wrong

Taking into account the definition of molarity, the molarity of the solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution is 0.75 \(\frac{moles}{liter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, you know:

Replacing in the definition of molarity:

\(Molarity=\frac{3 moles}{4 L}\)

Solving:

molarity= 0.75 \(\frac{moles}{liter}\)

Finally, the molarity of the solution formed by dissolving 3.00 moles of NaCl in enough water to yield 4.00 L of solution is 0.75 \(\frac{moles}{liter}\).

Learn more about molarity:

brainly.com/question/9324116

brainly.com/question/10608366

brainly.com/question/7429224

If one uses too much solvent for the recrystallization process the recovery of pure sample decreases.

To purify the sample, add just enough solvent to dissolve the solute and create a saturated solution at the solvent's boiling point. The amount of substance that can be recovered by crystallisation will be reduced if too much solvent is utilised.

Crystallization can be defined as the process through which the tittles motes of a substance arrange themselves in a well- defined three- dimensional chassis and accordingly, minimize the overall energy of the system. When a substance is subordinated to crystallization, its tittles or motes bind together through well- defined angles.

On adding a solid substance in a liquid and stirring it, the solid dissolves in the fluid. But when added more and more solid to the liquid, a point comes after which no more solid dissolves in the liquid.

Learn more about recrystallization:

https://brainly.com/question/10194206

#SPJ4