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2 years ago

5

What subatomic particle is specifically responsible for combining the atoms together to form a new substance?

1 answer:

mestny [16]2 years ago

3 0

Electron

Atoms, compounds, and molecules undergo chemical reactions to form new substances. In general, reactions proceed to produce products which are have more stability.

These chemical reactions are possible because of the ability of substances to form chemical bonds with other substances. These formation of bonds are primarily attributed to electronic interactions (i.e. the valence or outer electrons of the atoms). of substances.

Atoms are able to form new substances by gaining, losing, or sharing electrons with other atoms.

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You need to use a dilute hydrochloric acid solution in an experiment. However, the only bottle of hydrochloric acid in your lab’

mr_godi [17]

The pH of the diluted HCl solution is 1.3.

Explanation:

Given:

The concentrated HCl solution of 8.0 M. The 1.5 mL of 8.0 M HCl is diluted with water to 250 mL volume.

To find:

The pH of the diluted HCl solution.

Solution

The concentration of the HCl solution before dilution = $M_1=8.0 M$
The volume of the HCl solution taken for dilution = $V_1=1.5 ml$
The concentration of the HCl solution after dilution = $M_2=?$
The volume of the HCl solution after dilution = $V_2=250 mL$

Using the Dilution equation:

$M_1V_1=M_2V_2\\8.0M\times 1.5ml=M_2\times 250 mL\\M_2=\frac{8.0M\times 1.5ml}{250 mL}=0.048 M$

The concentration of diluted HCl solution = 0.048 M

$HCl(aq)\rightarrow H^+(aq)+Cl^-(aq)$

In the 1 M solution of HCl, there are 1 M of hydrogen ion, then the concentration of hydrogen ions in 0.048 M of HCl will be:

$[H^+]=1\times 0.048M=0.048 M$

The pH of the diluted HCl solution :

$pH=-\log [H^+]\\=-\log [0.048M]=1.18 \approx 1.3$

The pH of the diluted HCl solution is 1.3.

Learn more about the dilution equation here:

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4 0

2 years ago

At what temperature will 0.0705 mol of Cl2 exert a pressure of 900. torr at a volume of 0.750L?

kompoz [17]

Answer:

It will exert the pressure at a temperature of <em><u>153.44 K</u></em>

Explanation:

To answer this question, we shall be using the ideal gas equation;

PV = nRT

Since we are calculating the temperature, it can be made the subject of the formula.

Thus, this can be T = PV/nR

where P is the pressure = 900 torr

V is the volume = 0.75 L

n is the number of moles = 0.0705 mol

R is the molar gas constant = 62.4 L.Torr. $k^{-1}$ . $mol^{-1}$

Plugging these values into the equation, we have;

T = (900 × 0.75)/(0.0705 × 62.4)

T = 153.44 K

8 0

3 years ago

220 mL of oxygen gas was collected over water. The total pressure of oxygen plus water vapor was 745.8 mmHg at 25.0°C. What is t

alukav5142 [94]

The pressure, in mmHg, exerted by only the oxygen gas is 720.8 mmHg

<h3>Pressure of gas collected over water</h3>

The total pressure of a gas collected over water is given by P = P' + p where

P = pressure of oxygen gas and
p = vapour pressure of water at 25 °C = 25 mmHg

Making P' subject of the formula, we have

P' = P - p

Since the total pressure of oxygen plus water vapor is P = 745.8 mmHg, substituting the values of the variables into the equation, we have

P' = P - p

P' = 745.8 mmHg - 25 mmHg

P' = 720.8 mmHg

So, the pressure, in mmHg, exerted by only the oxygen gas is 720.8 mmHg

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3 0

2 years ago

All matter made up of tiny _____________ called atoms and molecules. particals of matter

Afina-wow [57]

Answer:

particles

Explanation:

hope these help and have a blessed day

5 0

2 years ago

Loren has the samples of elements that are listed below at room temperature. He exposes the samples to the same heat source unti

Burka [1]

Answer:

b

Explanation:

3 0

2 years ago

Read 2 more answers