If you have 500 ml of a 0.10 m solution of the acid, what mass of the corresponding sodium salt of the conjugate base do you need to make the buffer with a ph of 2.08 (assuming no change in volume)

The name of the compound made of magnesium and fluorine is magnesium fluoride and its formula is MgF2. Magnesium fluoride is a white crystalline solid that has a bitter taste and is insoluble in water. Magnesium fluoride is a stable ionic compound with a high melting point.

This compound is the primary source of magnesium and fluoride ions in many industrial and chemical processes. Magnesium fluoride is produced by the reaction between magnesium oxide and hydrogen fluoride.

MgO + 2HF → MgF2 + H2O

In the laboratory, magnesium fluoride is produced by dissolving magnesium hydroxide in hydrofluoric acid.

Mg(OH)2 + 2HF → MgF2 + 2H2O

Magnesium fluoride is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

Magnesium fluoride is a white crystalline solid with a bitter taste that is insoluble in water. It is the primary source of magnesium and fluoride ions in many industrial and chemical processes. The formula of magnesium fluoride is MgF2. It is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.

To know more about magnesium fluoride visit:

brainly.com/question/14829849

#SPJ11

The result of 554.3x10^117 - 5044x10^116 in standard form is  -4988.57 x10^116

The term standard form refers to a way in which mathematical notation is made much easier. It is always a number multiplied by 10 raised to a given power.

As such, the problem 554.3x10^117 - 5044x10^116 can be written as; 55.43x10^116 - 5044x10^116 = -4988.57 x10^116

Learn more about standard form:https://brainly.com/question/22649174

#SPJ1

Answer:

Larger predators would cause the rabbit to run faster to outrun their predator, so speed is a variation. Also their environment where they might need to blend in with their surroundings so skin color.

The structure of m-bromophenol is shown below:

In this structure, an m-bromophenol molecule has an aromatic phenol ring with one bromine atom attached to it.

The structure has two resonance structures due to the delocalized electrons in the benzene ring. The bromine atom is attached to the para-position of the phenol ring. The two hydrogen atoms on the ortho-position of the phenol ring are omitted for simplicity.

The aromatic ring in m-bromophenol is stabilized by delocalized electrons that are formed as a result of resonance.

This delocalization increases the stability of the molecule and decreases its reactivity. It also increases the solubility of m-bromophenol in organic solvents. The presence of the bromine atom on the para-position of the ring increases the polarity of the molecule.

To know more about aromatic   click on below link:

https://brainly.com/question/30171805#

#SPJ11

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

Answer:

So its a theory by Alfred Wegener is that All land was one big piece of land called pangea in the early 20th century people began to think that land masses can move such as many do just from it being there or natural disasters then going in to more research they found that when putting the continents together it fit like a puzzle  and the fact that some fossils were far away from were the same were found

The theory of continental drift, based their theory on several lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

The continental drift hypothesis states that all the continents were once joined together as one large mass of land, but then the land spread apart and drifted into their current positions.

The hot magma flows in convection currents due to tremendous heat and pressure within the earth. These currents cause the tectonic plates that make up the earth's crust to move.

Thus, The theory of continental drift, based their theory on many lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

To learn more about continental drift theory, follow the link;

https://brainly.com/question/28168801

#SPJ6

Answer:

See the answer below

Explanation:

No, water cannot be used to remove stains from the permanent makers. However, alcohol can be used.

Since the inks of permanent markers are insoluble in water, trying to clean a stain created by a permanent marker with water would be a waste of effort. Only alcohols can be used to successfully remove the stain because the inks will dissolve in the alcohols.

Answer:

The reactions of the cycloalkanes are generally just the same as the alkanes, with the exception of the very small ones - particularly cyclopropane. ... In the absence of UV light, cyclopropane can undergo addition reactions in which the ring is broken

a saline solution was made by dissolving 1.69 g sodium chloride in 200 ml distilled water,then the concentration of salt in the solution is 8.45 g/L.

To find the concentration of salt in the solution, we need to divide the amount of salt (in grams) by the volume of the solution (in liters).

First, we need to convert the volume from milliliters (mL) to liters (L):
200 mL = 0.2 L

Next, we can calculate the concentration of salt:
concentration = amount of salt / volume of solution
concentration = 1.69 g / 0.2 L
concentration = 8.45 g/L

Therefore, the concentration of salt in the solution is 8.45 g/L.

Learn more about concentration here:

https://brainly.com/question/10720472

#SPJ4

Answer:  The missing coefficient is 2.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

\(2NaOH+Ca(OH)_2+2Cl_2\rightarrow Ca(OCl)_2+2NaCl+2H_2O\)

As in the products, there are 2 atoms of sodium, thus there will be 2 atoms of  of sodium in the reactant as well.  This will balance the number of hydrogen and oxygen atoms as well.

Thus the missing coefficient is 2.

Based on the given emission spectrum, we can deduce that the hypothetical atom with a single electron has three energy levels. Diagrams that satisfy the condition that the atom has three energy levels corresponding to the wavelengths of the emitted photons are:

1) The first diagram has energy levels of -0.5 eV, -1.13 eV, and -1.77 eV, respectively.

2) The second diagram has energy levels of -0.5 eV, -0.87 eV, and -1.15 eV, respectively.

The energy difference between these levels corresponds to the wavelengths of the emitted photons, as per the relationship E = hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is wavelength.

Two possible energy-level diagrams that could represent the structure of this atom are as follows:

1) The first diagram has energy levels of -0.5 eV, -1.13 eV, and -1.77 eV, respectively. These energy levels correspond to the wavelengths of the emitted photons: 248 nm, 413 nm, and 620 nm. The transitions between these levels are indicated by arrows, and the energy of the emitted photons is shown in eV. This diagram implies that the atom has a ground state and two excited states.

2) The second diagram has energy levels of -0.5 eV, -0.87 eV, and -1.15 eV, respectively. These energy levels also correspond to the wavelengths of the emitted photons: 248 nm, 413 nm, and 620 nm. The transitions between these levels are indicated by arrows, and the energy of the emitted photons is shown in eV. This diagram implies that the atom has a ground state and two metastable states.

Both of these diagrams satisfy the condition that the atom has three energy levels corresponding to the wavelengths of the emitted photons, and are therefore consistent with the given emission spectrum.

for more such question on emission spectrum

https://brainly.com/question/24213957

#SPJ11

1) Convert moles of Br2 to grams

The molar mass of Br2 is 159.81 g/mol.

1 mol of Br2 is equal to 159.81 g Br2.

Answer:

"When two or more elements combine to form more than one compound, the mass of one of them, which joins the fixed mass of the other, is in relation to whole numbers and simple" Example: The carbo

There are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the number of moles in the substance by its molecular mass.

However, given that the number of molecules in calcium hydroxide is 4.07 x 10¹⁵molecules, we need to calculate the number of moles in Ca(OH)2 as follows:

no. of moles of Ca(OH)2 = 4.07 x 10¹⁵ ÷ 6.02 × 10²³

no. of moles = 0.676 × 10-⁸

no. of moles = 6.76 × 10-⁹ moles.

Molar mass of Ca(OH)2 = 74.093 g/mol

Mass of Ca(OH)2 = 74.093 × 6.76 × 10-⁹ moles

Mass = 5.01 × 10-⁷grams.

Therefore, there are 5.01 × 10-⁷grams in 4.07 x 10¹⁵molecules of calcium hydroxide.

Learn more about how to calculate mass at: https://brainly.com/question/8101390?referrer=searchResults

The mass of the glass is 1 gram.

What is specific heat capacity?

 This refers to the amount of heat in joules (J) absorbed per unit mass (kg) of the material when its temperature rises 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

From the question:

cp= 0.20 cal/(g°C)

T = 150°C

heat added = 30 cal

To find the mass of the glass, you can use the formula:

mass = heat added / (specific heat capacity x temperature change)

Substituting the given values:

mass =           30 cal

              (0.20 cal/(g°C) x 150°C)

mass =             30

                 (0.20 x 150)

mass       = 30

                  30

mass = 1 g

Hence, the mass of the glass is 1 gram.

Learn more about specific heat capacity on

https://brainly.com/question/1747943

#SPJ1

Answer:

50.1 g AlBr₃

Explanation:

Since you are not told which reactant is the limiting reactant, you should find the mass of AlBr₃ starting from both reactants. The correct answer will be the one which is the lower mass.

To find the mass, you should (1) convert from grams to moles of the reactant (via the molar mass from the periodic table), then (2) convert from moles reactant to moles AlBr₃ (via mole-to-mole ratio from equation), and the (3) convert moles to grams AlBr₃ (via molar mass). The final answer should have 3 sig figs because the given values also have 3 sig figs.

2 Al (s) + 3 Br₂ (l)  -----> 2 AlBr₃ (s)

Molar Mass (Al): 26.982 g/mol

30.0 g Al          1 mole             2 moles AlBr₃          266.69 g
--------------  x  ----------------  x  -----------------------  x  ------------------  = 297 g AlBr₃
                       26.982 g           2 moles Al                1 mole

Molar Mass (Br₂): 159.808 g/mol

45.0 g Br₂           1 mole              2 moles AlBr₃          266.69 g
----------------  x  -----------------  x  -----------------------  x  ------------------  = 50.1 g AlBr₃
                         159.808 g           3 moles Br₂                1 mole

Since 50.1 g is smaller than 297 g, Br₂ is the limiting reactant and the mass AlBr₃ produced is 50.1 g.

Answer:As the Earth spins on its own axis, ocean water is kept at equal levels around the planet by the Earth's gravity pulling inward and centrifugal force pushing ...

Explanation:

Serving as a coolant, lubricant, and solvent are all functions of water.

Water serves as a lubricant. water makes up a saliva and the fluids around the joints. water is also the most common coolant .water is best suited for the heat transfer medium because of the its high heat capacity value and the low cost make value. water is also called as the universal solvent. water dissolves more substance than any other liquid will dissolved. water is a polar molecule with having the partially positives and the negative charges.

Thus, Serving as a coolant, lubricant, and solvent are all functions of water.

To learn more about coolant here

https://brainly.com/question/3703377

#SPJ4

Answer:

A

Explanation:

energy stored in chemical bonds of molecules

They should be recycled but not reused because the "repeated use increases the risk of leaching and bacterial growth." Also, recycling PET plastic "results in reduced energy consumption, lower cost, and reduced environmental impact."

Answer:

EFFECTS OF WATER POLLUTION

In addition, here are some of the other consequences: Destruction of biodiversity. Water pollution depletes aquatic ecosystems and triggers unbridled proliferation of phytoplankton in lakes — eutrophication —. Contamination of the food chain

In the given scenario, a piston-cylinder system receives 51 kJ of heat and loses 12 kJ. The system produces work, and To calculate work we can use W = Q - ΔU formula

The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Mathematically, this can be represented as:

ΔU = Q - W

Where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

In this case, the system receives 51 kJ of heat (Q = 51 kJ) and loses 12 kJ (Q = -12 kJ). We need to calculate the work done by the system (W).

Using the first law of thermodynamics equation, we can rearrange it to solve for W:

W = Q - ΔU

Since the change in internal energy (ΔU) is not given, we cannot directly calculate the work done. Additional information about the change in internal energy or any other relevant parameters would be required to determine the amount of work produced by the system.

Learn more about work here: https://brainly.com/question/19382352

#SPJ11

Answer:

which question is it for

Answer:

Independent variable: Type of pesticide

Dependent variable: Number of pests killed

Explanation:

A variable is a factor that can take on different values. In scientific researches, there are three main kinds of variables; Independent, dependent and control variables.

Independent variable: an independent variable is directly under the control of the experimenter. It is the variable that gives a value to the dependent value based on its manipulations. In this example, the type of pesticide used is dependent on the experimenter, either A or B

Dependent variable: This is a variable that is being studied. It is not directly under the manipulation of the experimenter but has its values from the changes of the independent variables. In this example, the number of pests killed is dependent on the changing of the type of pesticide used.

Control Variable: Control variables are extraneous variables that are not being directly studied but can affect the outcome of interest hence needs to be held constant.

Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

When nuclei with nonzero magnetic moments are placed in a strong external magnetic field, they align themselves with the direction of the field. This process is known as nuclear magnetic resonance (NMR).

In NMR, the nuclei of certain atoms, such as hydrogen, carbon, and nitrogen, have a nonzero magnetic moment, which means they act like tiny magnets. When these nuclei are placed in a strong external magnetic field, they align themselves with the direction of the field. This alignment creates a measurable signal that can be detected and used to determine the structure of molecules.

The strength of the external magnetic field determines the energy difference between the two possible orientations of the nuclei. When the nuclei are exposed to radio frequency (RF) pulses, they can absorb energy and change their orientation. The frequency of the RF pulses is specific to the type of nuclei and the strength of the external magnetic field. By measuring the frequency and intensity of the absorbed RF pulses, scientists can determine the structure and composition of the sample.

In conclusion, nuclei with nonzero magnetic moments align themselves with the direction of a strong external magnetic field in a process known as nuclear magnetic resonance (NMR). This alignment creates a measurable signal that can be used to determine the structure of molecules.

Learn more about nuclei at:

https://brainly.com/question/30429613

#SPJ11

Answer:

a small dense nucleus with positive charge and the nucleus is surrounding by orbiting electrons.

Explanation:

An experiment in which alpha particles were used to bombard thin sheets of gold foil led to the conclusion that an atom is composed mostly of a small dense nucleus with positive charge and the nucleus is surrounding by orbiting electrons.Explanation:

Answer:

1.25 moles of magnesium chloride are produced

Explanation:

Based on the reaction:

Mg(s) + 2HCl (aq) → MgCl₂(s) + H₂(g)

1 mole of magnesium, Mg, reacts with 2 moles of hydrochloric acid, HCl, to produce 1 mole of magnesium chloride, MgCl₂ and 1 mole of hydrogen gas.

To solve this question we have to tak, from the chemical equation:

2 mol HCl = 1mol MgCl₂

That means, the moles of MgCl₂ produced from 2.50mol HCl are:

2.50 mol HCl * (1mol MgCl₂ / 2mol HCl) =

They are goggles, safety glasses, and face shields. Safety Glasses: Safety glasses have side shields and lenses composed of plastics like propionate or polycarbonate that are shatter-resistant.

They are designed to stop objects like wood chips and other heavy, dangerous objects from damaging your eyes. Protection from collision, dust, and chemical splashes is provided by goggles. Like safety glasses, safety goggles are very impact resistant. They also provide a secure barrier around the entire eye, protecting it from threats coming from all directions. Side protection is required. Direct ventilated goggles, commonly referred to as dust goggles, are a form-fitting style of eye protection designed to keep large particles out of the goggles. When handling hazardous substances, wear protective goggles or glasses at all times.

To learn more about polycarbonate click here https://brainly.com/question/20760323

#SPJ4