Hydroxyapatite, Ca5(PO4)3(OH), is the main mineral component of dental enamel, dentin, and bone, and thus it has many medical uses. Coating it on metallic implants (such as titanium alloys and stainless steels) helps the body accept the implant. In the form of powder and beads, it is used to fill bone voids, which encourages natural bone to grow into the void. Hydroxyapatite is prepared by adding aqueous phosphoric acid to a dilute slurry of calcium hydroxide.
(a) Write a balanced equation for this preparation. Be sure to include the state of each reactant and product in the equation. Hint: Liquid water is one of the products of this reaction.
(b) What mass of hydroxyapatite could form from 128 g of 95.0% phosphoric acid and 113 g of calcium hydroxide?
g Ca5(PO4)3(OH)

As you move from left to right across a row of the periodic table, the atomic number increases, meaning there are more protons in the nucleus of the atom.

Atomic number is the number of protons in the nucleus of an atom, which determines its chemical properties and place in the periodic table of elements. The atomic number is represented by the symbol Z and is the whole number located above an element's symbol in the periodic table.

Elements are arranged in order of increasing atomic number, and elements with the same atomic number belong to the same element, regardless of their mass number or number of neutrons.

Learn more about  atomic number, here:

https://brainly.com/question/8834373

#SPJ1

Potash alum, represented by the chemical formula KAl(SO4)2·12H2O, is a double salt because it consists of two different salts, potassium sulfate (K2SO4) and aluminum sulfate (Al2(SO4)3), combined together. It forms a unique crystalline structure with 12 water molecules incorporated in its composition.

Potash alum is a type of alum that is commonly used in dyeing and water purification applications. The chemical formula for alum is KAl(SO4)2·12H2O.

The term "double salt" refers to the fact that the compound is made up of two different types of ions that are combined together.
In the case of potash alum, the two different types of ions are potassium ions (K+) and aluminum ions (Al3+). These two ions are combined together in a 1:1 ratio to form a complex ion, KAl(SO4)2, which is then combined with 12 water molecules to form the final compound, KAl(SO4)2·12H2O.
The term "double salt" is used to describe this type of compound because it contains two different types of cations (positive ions) that are combined together to form a single crystal lattice structure.

The two different cations are held together by ionic bonds, which are relatively strong and help to give the compound its characteristic properties.
Potash alum is a particularly useful compound because it has a number of important properties that make it useful in a variety of applications.

For example, it is highly soluble in water, which makes it a good choice for use in water purification applications.

It is also relatively stable and non-toxic, which makes it safe to use in a variety of different settings.

Finally, it has a number of useful physical properties, such as its ability to form crystals that are highly reflective and have a characteristic octahedral shape.

For more such questions on alum

https://brainly.com/question/28773298

#SPJ8

Answer:

two atoms of oxygen. For H2O, there is one atom of oxygen and two atoms of hydrogen.

Answer: i think its empirical

Explanation:

Explanation:

57.3ml

we use Charles's law

to solve the question

Answer:

\(\boxed {\boxed {\sf 225 \ mL}}\)

Explanation:

The temperature and volume of the gas are changing, so we use Charles's Law. This states the temperature of a gas is directly proportional to the volume of a gas. The formula is:

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)

The original volume is unknown. The new volume is 75 milliliters.

The gas is cooled from 150 Kelvin to 50 Kelvin, so the original temperature is 150 K and the new temperature is 50 K.

We know that:

Substitute the values into the formula.

\(\frac {V_1}{150 \ K}=\frac{ 75 \ mL}{50 \ K}\)

Since we are solving for the original volume, we must isolate the variable V₁.

It is being divided by 150 K. The inverse of division is multiplication, so we multiply both sides by 150 K.

\(150 \ K *\frac {V_1}{150 \ K}=\frac{ 75 \ mL}{50 \ K}* 150 \ K\)

\(V_1=\frac{ 75 \ mL}{50 \ K}* 150 \ K\)

The units of Kelvin (K) cancel.

\(V_1= \frac{ 75 \ mL}{50 }* 150\)

\(V_1=1.5 * 150 \ mL\)

\(V_1= 225 \ mL\)

The original volume is 225 milliliters.

The proper name of the compound is now 1,1 - dihydroxy-3-phenyl propene.

Firstly we know that the parent chain is based on propane. Now we have three substituents on that parent chain. Two hydroxy moieties and one phenyl moiety.

The proper name of the compound is now 1,1 - dihydroxy-3-phenyl propene.

Learn more about names of molecules:https://brainly.com/question/26196615

#SPJ1

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

Answer:

0.35 M

Explanation:

Using the formula; C1V1 = C2V2

Where;

C1 = concentration of initial solution

C2 = concentration of final solution

V1 = volume of initial solution

V2 = volume of final solution

Based on this question, I start with 0.0350 L of a 12.0 M hydrochloric acid solution, and dilute it with water to a new volume of 1.20 L. This means that:

C1 = 12.0 M, V1 = 0.0350 L, V2 = 1.20 L, C2 = ?

Hence, C1V1 = C2V2

12 × 0.0350 = C2 × 1.20

0.42 = 1.2C2

C2 = 0.42/1.2

C2 = 0.35 M

The temperature should be between 30 °F and 60 °F because the temperature outside is 39 °F, so the water in the pond should have a temperature range that includes this temperature.

Therefore, the answer is B.

Similar to glucagon, epinephrine increases glycogenolysis in the liver, which raises blood glucose levels.

Glycogenolysis is the biological process through which glucose and glucose-1-phosphate are produced from glycogen. Both myocytes and hepatocytes contribute to the reaction. The process is affected by glycogen, epinephrine and insulin in such a way that-

Know more about biology of glycogenolysis at:

https://brainly.com/question/29429567

#SPJ4

Explanation:

density= mass × volume

3.35×5

=. 16 .75

Answer:

The temperature of the iron block is 68.5°C.

Explanation:

The heat released during condensation of water is used to warm the iron block:

q = m_H2O * ΔH_vap = m_fe * c_fe * ΔT

where q is the heat released, m_H2O is the mass of water condensed, ΔH_vap is the enthalpy of vaporization for water, m_fe is the mass of iron, c_fe is the specific heat capacity of iron, and ΔT is the change in temperature of the iron block.

Rearranging the equation gives:

ΔT = (m_H2O * ΔH_vap) / (m_fe * c_fe)

Substituting the given values gives:

ΔT = (0.95 g * 44.0 kJ/mol) / (75.0 g * 0.449 J/(g°C))

ΔT = 46.5°C

Therefore, the final temperature of the iron block is:

T_f = T_i + ΔT = 22°C + 46.5°C = 68.5°C.

The final temperature of the iron block is 68.5°C.

Given what we know about the characteristics of matter and the observations given by the question, we can confirm that the characteristic properties observed by the scientists are the color, density, and the reaction of the liquid with carbon dioxide.

When we mention the properties of matter, we are speaking in general terms. Anything we can observe can be a property of the matter, such as:

and etc. However, not all properties are characteristic properties of matter. These properties are reserved for those that do not change. Therefore, they are properties that can be used to identify matter.

Of the options listed, the properties that can be considered characteristic of this type of matter are the density, the color, and the reaction it has in the presence of carbon dioxide. This is because these properties will be the same anytime we have a sample of this matter, regardless of its mass, shape, or quantity.

To learn more visit:

https://brainly.com/question/1174549?referrer=searchResults

Answer:

By mixing two solutions of differing pH values, the final pH of the mixed solution is going to be a function of the pH-, or the hydrogen ion (H+), of the lower pH solution, and the final volume. The hydrogen ion(H+) of the higher pH solution has little to no effect in the final pH value.

Answer:

                                                                2CO(g) + O2(g) ⇌ 2CO2(g)

Increasing the concentration of CO -         ↓         ↓                 ↑

Increasing the concentration of CO2 -       ↑         ↑                 ↓

Explanation:

The given reaction is

2CO(g) + O2(g) ⇌ 2CO2(g)

a) When the concentration of CO is increased, the stress is relieved as the reaction that consumes the added CO occurs more rapidly than its reverse reaction, for example., the forward reaction rate increases. The equilibrium will shift in favor of the product. However, the concentration of reactants (CO and O2) decreases and product concentration (CO2) increases.

b) When the concentration of CO2 is increased, the stress is relieved as the reaction that consumes the added CO2 occurs more rapidly than its reverse reaction, for example., the rate of backward reaction increases. The equilibrium will shift in favor of the reactant. Therefore, the concentration of reactants (CO and O2) increases, and the product concentration (CO2) decreases.

Hope this helps!

The asbestos exposure during the years 1982 and 1983 was 2.5 fibers per cubic centimeter and 0.8 fibers per cubic centimeter respectively. So asbestos exposure decreased by 1.7 fibers per cubic centimeter during the year 1983.

Breathlessness Persistent, dry cough Chest pain or tightness Lack of a dry, crackling sound in the lungs when you breathe in Wider and rounder fingers and toes are some of the symptoms of asbestos exposure.

The largest group of people exposed to asbestos is those working in the construction industry. Historically, asbestos was also used by pipe fitters and shipyard workers. In addition, asbestos was used by military personnel, auto mechanics, and many other occupations.

To learn more about asbestos, refer to the link:

https://brainly.com/question/8853025

#SPJ1

Answer:

[Kr] 4d² 5s²

Explanation:

Answer:

* \(x_{CH_3OH}=0.0425\)

* \(\%m/m_{CH_3OH}=7.31\%\)

* \(m=2.46m\)

Explanation:

Hello,

In this case, for the mole fraction of methanol we use the formula:

\(x_{CH_3OH}=\frac{n_{CH_3OH}}{n_{CH_3OH}+n_{water}}\)

Thus, we compute the moles of both water (molar mass 18 g/mol) and methanol (molar mass 32 g/mol):

\(n_{CH_3OH}}=14.6g*\frac{1mol}{32g}=0.456molCH_3OH \\\\n_{water}}=185g*\frac{1mol}{18g}=10.3molH_2O\)

Hence, mole fraction is:

\(x_{CH_3OH}=\frac{0.456mol}{0.456mol+10.3mol}\\\\x_{CH_3OH}=0.0425\)

Next, mass percent is:

\(\%m/m_{CH_3OH}=\frac{m_{CH_3OH}}{m_{CH_3OH}+m_{water}}*100\%\\\\\%m/m_{CH_3OH}=\frac{14.6g}{14.6g+185g}*100\%\\\\\%m/m_{CH_3OH}=7.31\%\)

And the molality, considering the mass of water in kg (0.185 kg):

\(m=\frac{n_{CH_3OH}}{m_{water}} =\frac{0.456mol}{0.185kg}\\ \\m=2.46m\)

Regards.

This kind of matrix composite is renowned for strengthening the dispersive material's resistance to fracture. metals, ceramics, and polymers.

Ceramic matrix composites (CMC) are substances made of both ceramic and composite components.It consists of two parts: a matrix that holds the material together and a reinforcement that gives the material its tensile strength. When ceramic matrix composites have a scattered phase, it is primarily because the material's toughness has increased, which has increased the tensile strength.

To learn more about Ceramic matrix composites :

https://brainly.com/question/12974524

#SPJ4

Answer:

a. Rate = k [H2O+-OH][Br-]

Explanation:

For a reaction:

nA+xB→C+D

The rate of the reaction is:

Rate = [A]ⁿ[B]ˣ

Now, in a mechanism, the rate of the reaction depends of the slow step. In the problem:

H2O+-OH + Br-→ HOBr + H2O

And the rate is:

Answer:

TRUE

Explanation:

plz brian list

Answer:

True

Explanation:

Answer:

The correct answer is option c. "a liquid vaporizes and condenses at the same rate"

Explanation:

In chemistry, dynamic equilibrium is defined as a state where the reaction rate of a forward reaction is equal to the reaction rate of the backward reaction. In this case, the reactions that participate in the system are the vaporization of a liquid and the condensation of a gas. Therefore, dynamic equilibrium is established when a liquid vaporizes and condenses at the same rate.

The wavelength of lambda is 2.93 m. = (c)/(v) = (3 xx 10(8) ms-(-1), 102.5 xx 10(6)s-(-1), 2.93 m' 2.93 meters is the wave length. 27 Jun 2022.

In order to get a radio wave's wavelength, divide its frequency by the speed of light (c = 299 792 458 m). The following is the formula for determining a radio wave's wavelength: Wavelength is equal to c/f, where c is the speed in meters per second, and f is the frequency in Hertz.

A wave train's speed (v) in a medium is equal to its frequency (f), hence the formula for wavelength is v/f. Wavelength is typically represented by the Greek symbol lambda ().

To know more about wavelength  visit :-

https://brainly.com/question/13533093

#SPJ1

Carbon contains four electrons in its outer shell

1 . a.

Solution :

a. The oxidation reduction reactio is

1.    HNO₃ + Cu(3) --> Cu(NO₃)₂ + 2H₂O(l) + 2NO₂(g)

    Half reaction

    oxidation --> Cu(s) --> Cu(NO₃)₂(aq)

    reduction --> HNO₃ -->NO₂

   copper is oxidized and nitrogen is reduced

2 ->  CuSO₄(aq) + zn(s) --> Cu(s) + ZnSO₄(aq)

        Half reaction .

        oxidation --> Zn(s) --> ZnSO4(aq)

        Reduction --> CuSO₄ (aq) --> Cu(s)

        zinc is oxidized and copper is reduced.

3 ->   Zn(s) + 2H⁺(aq) --> Zn²⁺(aq) + H₂(g)

        oxidation --> Zn(s) --> Zn²⁺(aq)

         Reduction --> 2H⁺(aq) -->H₂(g)

        Zinc is oxidized and hydrogen is reduced .

b .  Acid - base reaction

       CuO(s) + H₂SO₄(aq) -->CuSO₄(aq) + H₂O(l)

       precipitation reaction

      Cu(NO₃)₂(aq) + 2NAOH(aq) -->Cu(OH)₂ + 2NANO₃

2 .  21.33 mL of 3.0 M NAOH are required to neutralize 4.0 mL of 16.0 M                        HNO2

1 mole of NAOH required to neutralized the

     1 mole of HNO₃

   NAOH + HNO₃ --> H₂O +NANO₃

 (M₁V₁)NAOH  =  (M₂V₂)HNO2

  3 * V₁  = 4 * 16

     V₁ = 64/3

     V₁= 21.33 ml

The term oxidation was originally used to describe the reaction in which an element combines with oxygen.

Example: The reaction of magnesium metal with oxygen to form magnesium oxide involves the oxidation of magnesium.

The term reduction comes from the Latin root and means "to undo". So anything that goes back to magnesium metal is a reduction.

The reaction of magnesium oxide with carbon at 200°C to form magnesium metal and carbon monoxide is an example of the reduction of magnesium oxide to magnesium metal.

electrons were discovered, the chemist became convinced that redox reactions involve the transfer of electrons from one of his atoms to another.

Learn more about oxidation and reduction here : https://brainly.com/question/4222605

#SPJ4

Answer: In an ionic bond, one atom donates an electron to another atom. This stabilizes both atoms. Because one atom essentially gains an electron and the other loses it, an ionic bond is polar. In other words, one atom in the bond has a positive charge, while the other has a negative charge. Often, these atoms dissociate into their ions in water. Atoms that participate in ionic bonding have different electronegativity values from each other. If you look at a table of electronegativity values, it is apparent ionic bonding occurs between metals and nonmetals. Examples of compounds with ionic bonds include salt, such as table salt (NaCl).

At 3,557 torr, 16.45 moles of methane gas are at a temperature of T=17.15 K in a 70.7 L container.

According to the ideal gas law: PV=nRT, where R=0.082 and T is temperature in Kelvin (K). P is pressure, V is volume, n is the amount in moles.

(4.68)*(4.95)=(16.45)*(0.0821)*

T=17.15, therefore calculate it.

An object that is in the gaseous, or vaporous, condition of matter, is referred to as a gas. When referring to material with characteristics of a gaseous substance, the word "gas" can also refer to the condition itself. Along with liquid, solid, and plasma, gases are one of the four natural states of matter. The shape or volume of a gas can change.

To know more about Gas visit:

https://brainly.com/question/10725862

#SPJ1

Answer:

245

Explanation:

everyone needs to chill don't answer if you can't get it right it wastes you time and others as well not trying be a hater but its true

Answer:

Chemical

Explanation:

Hope it helps!