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3 years ago

What two subatomic particles have to be different in order to have an ion?

Chemistry

1 answer:

lisabon 2012 [21]3 years ago

6 0

Answer:

A)Protons and electrons

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

when an atom lose or gain the electron ions are formed and number of protons and electrons no longer remain the same.

For example:

An atom of sodium when lose one electron it form positive ion. The number of electrons became 10 and number of protons remain 11.

Na → Na⁺ + 1e⁻

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a metal object has a mass of 9.0g and a volume of 1.5ml. what is the density of the object? density= mass/volume

weeeeeb [17]

The density of the metal object=6.0 $\frac{g}{m l}$

Given:

Volume of the metal object=1.5ml

Mass of the metal object=9.0g

To find:

Density of the metal object

Step by Step Explanation:

Solution:

According to the formula, Density of the metal object can be calculated as

$\rho=\frac{m}{v}$

Where, m=mass of the metal object

$\rho$ =density of the metal object

v=volume of the metal object

We know the values of v=1.5ml and m=9.0g

Substitute these values in the above equation we get

$\rho=\frac{m}{v}$

$\rho$ =9.0/1.5

=6.0 $\frac{g}{m l}$

Result:

Thus the density of the metal object is 6.0 $\frac{g}{m l}$

4 0

3 years ago

at a particulat temperature, a smaple of pure water has a Kw of 7.7x10-14. what is the hydroxide concentration of this sample

ycow [4]

Answer: The hydroxide concentration of this sample is $3.85\times 10^{-7}$

Explanation:

When an expression is formed by taking the product of concentration of ions raised to the power of their stoichiometric coefficients in the solution of a salt is known as ionic product.

The ionic product for water is written as:

$K_w=[H^+]\times [OH^-]$

$7.7\times 10^{-14}=[H^+]\times [OH^-]$

As $[H^+]=[OH^-]$

$2[OH^-]=7.7\times 10^{-14}$

$[OH^-]=3.85\times 10^{-7}$

Thus hydroxide concentration of this sample is $3.85\times 10^{-7}$

4 0

3 years ago

Calculate the percentrage of neutral form of aspirin that is present in the stomach ph 1.

Korolek [52]

Answer:

The 99.68% of the aspirin is present in the neutral form

Explanation:

Aspirin, Acetylsalicylic acid, is a weak acid with pKa = 3.5

Using Henderson-Hasselbalch equation:

pH = pKa + log [A⁻] / [HA]

Where [A⁻] is the ionized form and HA the neutral form of the acid

Replacing with a pH of stomach of 1.0:

1.0 = 3.5 + log [A⁻] / [HA]

-2.5 = log [A⁻] / [HA]

3.16x10⁻³ = [A⁻] / [HA] (1)

A 100% of aspirin is = [A⁻] + [HA]

100 = [A⁻] + [HA] (2)

Replacing (2) in (1)

3.16x10⁻³ = 100 - [HA] / [HA]

3.16x10⁻³[HA] = 100 - [HA]

1.00316 [HA] = 100

[HA] = 99.68%

<h3>The 99.68% of the aspirin is present in the neutral form</h3>

8 0

3 years ago

Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition o

kykrilka [37]

Answer:

With regards to the final composition of the mixture in the vessel at equilibrium, there will be very little amount of the reactants (BrOCl and BrCl), since some amounts of each have been used to form the products (Br2 and OCl).

4 0

3 years ago

an electron on a hydrogen atom falling to the n=2 level emits light at a wavelength of 410 nm. From which energy level did the e

____ [38]

Answer:

Explanation:

This can be calculated from a general equation from the which the energies of the various spectral lines of hydrogen shown in the image attached. The various series of hydrogen are:

Lyman, Balmer, Paschen,Bracket and Pfund series.

5 0

3 years ago