Which statement describes the process of wind erosion?

Aleks04 [339]

B, you can see there are 2 F atoms on each side of the equation

5 0

3 years ago

A scientist introduces an unknown type of particle into a cathode ray tube. The unknown particles travel in the same direction a

sergij07 [2.7K]

Answer: B

Explanation:

5 0

3 years ago

Calculate the concentration (M) of sodium ions in a solution made by diluting 10.0 mL of a 0.774 M solution of sodium sulfide to

Luda [366]

The concentration of sodium ions in a solution made by diluting 10.0 mL of a 0.774 M solution of sodium sulfide to a volume of 100 mL would be 0.1548 M.

<h3>Dilution</h3>

According to the dilution principle, the number of moles of solutes in a solution before and after dilution must be the same. This is expressed as the following equation:

$m_1v_1 = m_2v_2$

Where $m_1$ is the molarity before dilution, $v_1$ is the volume before dilution, $m_2$ is the molarity after dilution, and $v_2$ is the volume after dilution.

In this case, $m_1$ = 0.774 M, $v_1$ = 10.0 mL, $v_2$ = 100 mL.

$m_2$ = $m_1v_1/v_2$

= 0.774 x 10/100

= 0.0774 M

Thus, the new concentration of the sodium sulfide solution would be 0.0774 M.

Mole of the final solution: 0.0774 x 0.1 = 0.00774 mol

Sodium sulfide formula = $Na_2S$ ---> $2Na^+ + S^{2-$

Equivalent mole of sodium ion = 0.00774 x 2

= 0.01548 mol

The concentration of sodium ions = mol/volume

= 0.01548/0.1

= 0.1548 M

In other words, the concentration of the sodium ions in the diluted solution would be 0.1548 M.

More on dilution can be found here: brainly.com/question/21323871

#SPJ1

6 0

1 year ago

Consider the following data for five hypothetical elements: Q, W, X, Y, and Z. Rank the elements from most reactive to least rea

aleksley [76]

Answer:

Y Q W Z X

Explanations:

The most reactive element is the element that will displace an element from it compound . The most reactive element will replace the less reactive element in it compound.

Q+ + Y Reaction occurs

Since the reaction occurs the element Y which is more reactive displaced element Q from it compound.

Q+W+ Reaction occurs

The reaction occurs, that means element Q replaces element w from it compound. Element Q is therefore more reactive than element W.

W+Z+ Reaction occurs

The reaction also occurs . This is an indication that element W replaces element Z in it compound. This means element W is very reactive than element Z.

X+Z+ No reaction

There is no reaction here. This is an indication that element X is less reactive than element Z. This is why element X can't displace element Y in it compound.

4 0

3 years ago

The movement of molecules across a membrane from an area of high concentration to one of low concentration is best described as:

mestny [16]

Answer:

Difussion

Explanation:

Diffusion is the result of a totally random phenomenon in which the molecules of a fluid come and go between two vessels that can be connected by a pipe. These molecules travel in a single direction, where the solute is more concentrated to where it is more diluted.

This movement of particles will be modified according to the length or area of the pipe and the concentration of solute. The greater the difference in solute concentration along the tube, the greater the diffusion

6 0

3 years ago