What is the pH of a 0.0010 M HNO3? 1.0 3.0 4.0 5.0

What is an example of a physical change?

Degger [83]

An example of a physical change is the process of tempering steel to form a knife blade.

physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

3 0

1 year ago

What three types of particles make up an atom? What are their charges?

Zepler [3.9K]

Answer:

Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P." Neutrons have no electrical charge.

4 0

2 years ago

Read 2 more answers

What is Science-Based Medicine?

SSSSS [86.1K]

Answer: Medicine is a scientific field whose subject of research is the health and well-being of living whips.

Explanation:

Primarily medicine deals with the study of man and the treatment of man, but also of some animal species. Two principles are founded: theoretical research and practical, or often called a clinical policy. The academic and research law will enable a specific area, disease, congenital disability, or condition to be defined, studied in detail, and after the conclusion of tests performed. Concluded medical theory is most often put into a usable form through various educational processes, which will lead to the ultimate goal - to improve the health of living forms on which this theory will be applied.

6 0

2 years ago

A nearly flat bicycle tire becomes noticeably warmer after it has been pumped up. Approximate this process as a reversible adiab

evablogger [386]

Complete Question

A nearly flat bicycle tire becomes noticeably warmer after it has been pumped up. Approximate this process as a reversible adiabatic compression. Take the initial pressure and temperature of the air before it is put in the tire to be Pi = 1.00 bar and Ti = 298 K. The final volume of the air in the tire is Vf= 1.50 L and the final pressure is Pf = 5.00 bar. Calculate the final temperature of the air in the tire.

Assume that Cv,m = 5R/2

Answer:

The value is $T_f = 471.978 \ K$

Explanation:

From the question we are told that

The initial pressure is $P_i = 1.00 \ bar$

The initial temperature is $T_i = 298 K$

The final volume is $V_f = 1.50 \ L$

The final pressure is $P_f = 5.0 \ bar$

Generally the equation for reversible adiabatic compression is

$P_i V_i^{\gamma} = P_f V_f^{\gamma}$

Generally from the ideal gas equation we have that

$PV = n RT$

=> $V = \frac{n RT}{P}$

So

$P_i *[ \frac{n RT_i}{P_i}]^{\gamma} = P_f [ \frac{n RT_f}{P_f}]^{\gamma}$

=> $P_i ^{1 - \gamma} * T_i ^{\gamma} = P_f ^{1-\gamma} * T_f^{\gamma}$

=> $T_f ^{\gamma} = \frac{ P^{1 - \gamma * T_i^{\gamma}}}{ P_f ^{1 - \gamma}}$

=> $T_f =[ \frac{ P_i ^{1 - \gamma} * T_i^{\gamma}}{P_f^{1 - \gamma}}]^{\frac{1}{\gamma} }$

=> $T_f = T_i * [\frac{P_i}{P_f} ]^{\frac{1- \gamma}{\gamma}$

Here $\gamma$ is a constant mathematically represented as

$\gamma = \frac{C_{P,m}}{C_{V, m}}$

Here

$C_{P,m}}$ is the molar heat capacity at constant pressure

and $C_{V,m}}$ is the molar heat capacity at constant volume given as

$C_{V,m}} = \frac{5R}{2}$

Generally $C_{P,m}}$ for an ideal gas is mathematically represented as

$C_{P,m}} = R +C_{V,m}}$

So

$\gamma = \frac{\frac{5R}{2} + R}{ \frac{5R}{2} }$

=> $\gamma = \frac{7}{5}$

So

=> $T_f = T_i * [\frac{P_i}{P_f} ]^{\frac{1- \frac{7}{5}}{ \frac{7}{5}}$

=> $T_f = 298 * [\frac{1}{5} ]^{\frac{1- \frac{7}{5}}{ \frac{7}{5}}$

=> $T_f = 471.978 \ K$

4 0

2 years ago

Which of the following terms describes cinnamon sugar?

Leona [35]

Answer: Option (2) is the correct answer.

Explanation:

An element is defined as a substance that cannot be broken down into simpler substances.

For example, magnesium is a metal and it contains only atoms of magnesium.

Whereas a compound is defined as a substance that contains two different elements which are chemically combined together in a fixed ratio by mass.

For example, KCl is a compound in which atoms are present in 1:1 ratio.

Both an element and a compound are pure substances.

A mixture is defined as a substance in which two or more number of different substances are mixed together. Particles of a mixture never combine chemically to each other.

For example, cinnamon sugar is a mixture of different essential oils and spices.

Thus, we can conclude that the term mixture is the term which describes cinnamon sugar.

8 0

2 years ago