Use the periodic table to calculate the molar mass of each compound below. All answers must have 2 decimal places.

the answer is
Sodium hydroxide (NaOH) ⇒ 40.00 g/mol

Glucose (C6H12O6) ⇒ 180.18 g/mol

Calcium sulfate (CaSO4) ⇒ 136.15 g/mol

Magnesium phosphate (Mg3(PO4)2) ⇒ 262.87 g/mol

The volume of Solution of glucose is 8.75 ml.

According to dilution law:

[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]

where,

[tex]M_{1}[/tex] = molarity of stock solution = 1.00 M

[tex]V_{1}[/tex] = volume of stock solution =?

[tex]M_{2}[/tex] = molarity of glucose solution = 1.75×10−2

[tex]M_{2}[/tex] = volume of glucose solution = 500 ml

Applying all the given values to the above law gives the volume of the stock solution:

(1.00M) x [tex]V_{1}[/tex] = ( 1. 75×[tex]10^{2}[/tex]M) x (500ml)

[tex]V_{1}[/tex] = 8.75 ml

The volume of the 1.00 M stock solution is 8.75 mL of the required volume.

To determine the amount of stock solution required divide the number of moles of glucose by the molarity of the stock solution. A 1 M glucose stock solution can be prepared by dissolving 18 g of glucose in distilled/deionized water to a final volume of 100 ml. The total mass of a solution is the mass of the solvent plus the mass of the solute. Weigh the mass using a laboratory balance or convert the solvent volume to mass using the density formula D = m/V. Add the mass of the solute to the mass of the solvent to get the final volume.

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According to the concept of molar concentration, 57.44 ml of  0.2 M NaOH is required for neutralization of  345 ml of of 0.0333 C₆H₈O₇ solution.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

For the given  problem, in case of 2 solutions it is found out as,

M₁V₁=M₂V₂

On substitution,V₁=345×0.0333/0.2=57.44 ml.

Thus, 57.44 ml of NaOH is required for neutralization of C₆H₈O₇ solution.

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To find AH°rxn, we use the following equation:

What we're going to do is to sum the enthalpy of the products and then substract with the enthalpy of the reactives:

As you can see, we need to multiply by the coefficients of the reaction.

Now, just replace the values of the table:

So the answer is -822.2kJ/mol.

For b:

Now, just replace the values of the table:

The answer for b is -1036kJ/mol.

Answer: 3 or 4

Explanation:it would be air because it’s structurally atom is 3

The major product of the hydration of 2‑methylprop‑1‑ene is found in the image attached to this answer.

One of the reactions that the alkenes undergo is the reaction that is called hydration. This has to do with the addition of the water molecule across the double bond of the alkene and this would lead to the production of an alcohol.

Recall that this addition occurs in such a way that the negative part of the addendum would be added to the carbon atom that has the least number of the hydrogen atoms thus the reaction is found to be regioselective.

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The nucleus is the atom's central core and contains more than 99.9 percent of its mass. Surrounding the nucleus is a cloud of electrons, which makes up most of the atom's volume.

E(g)E+(g)+e is the designation given to the reaction's energy.

An endothermic reaction is what? Chemical reactions known to as thermally activated reactions take place when the reagents take in thermal energy from their environment and produce byproducts. These reactions produce a cooling effect by bringing the heat of the space around them down.

Respiration, evaporation fluids, ice melting, ice particles, alkane splitting, thermal degradation, ammonium chloride in water, and many other processes are examples of endothermic processes. Endo means "to absorb," and thermo means "heat," as the name suggests.

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Explanation:

beacuse they can be separeted by evaporation

A solution of salt water is a form of the mixture since salt can be

Allegra a pharmaceutical product has one possible stereoisomerism and is used for getting relief from allergy

Chiral carbons in the molecule are linked to stereo-genic carbon. Chiral molecules typically have four non-identical substituents on at least one carbon atom.

Complete response: Fexofenadine is marketed under the name Allegra by pharmaceutical companies. It is a well-known antihistamine medication used to treat allergy symptoms like hay fever and urticaria.

We must understand the structure of stereo-genic carbon atoms in order to determine whether stereo-genic carbons are present in Allegra molecules. The "centre of chirality" is a stereogenic carbon atom. As a result, it is connected to chiral carbon atoms.

An asymmetric carbon atom with four different atoms or groups of atoms connected to it is called chiral carbon. There are two optical isomers for each chiral carbon in a given molecule.  It is obvious from the molecular structure that the carbon atom at the extreme right is not joined to four separate groups. In its place, there are two methyl groups.

As a result, the structure contains one stereogenic carbon. An atom, often carbon, that has four distinct attachments is referred to as a stereo-centre. Since each attachment is distinct, a new molecule can be created by shifting any two attachments into a different position.

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Water that has dissolved carbon dioxide gas in it is referred to as carbonated water. This gas can be added to water intentionally under pressure or naturally through geological processes. The water becomes fizzy due to the formation of tiny bubbles from carbonation.

A sweetener manufactured from maize starch, high-fructose corn syrup is sometimes referred to as glucose-fructose, iso-glucose, and glucose-fructose syrup. Similar to how regular corn syrup is made, enzymes convert the starch in the starch into glucose.

To help prevent or treat nausea and vomiting caused by motion sickness, pregnancy, and cancer chemotherapy, health care professionals may now use ginger. It may possibly be used to treat cardiac problems. It is also used to alleviate moderate stomach upset and to lessen osteoarthritis pain.

Organic compound HOC(CH2CO2H)2 is the formula for citric acid. Citrus fruits naturally contain it. It is a biochemical intermediary in the citric acid cycle, which is a component of all aerobic organisms' metabolism.

The sodium counterpart of benzoic acid, sodium benzoate, is a common food preservation and pickling agent. It is a white, crystalline substance with the chemical formula C6H5COONa.

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Answer: If your body lacks connective tissues, you will be unable to walk or lift anything. These tissues, which include muscle fibers, bones, tendons, ligaments, and so on, allow each bodily part to communicate with one another. Without them, everything would move isolatedly - which is why they are important for movement as well as stability.

Explanation:

When cooking in the same pan and on the same burner setting, 250 ml (about 1 cup) of water will start to boil more quickly than 1 l (about 4 cups) of water. This is because 1 cup of water has a lower heat capacity than 4 cups.

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Answer:

'Red shift' is a key concept for astronomers. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum.

Something similar happens to sound waves when a source of sound moves relative to an observer. This effect is called the 'Doppler effect' after Christian Andreas Doppler, an Austrian mathematician who discovered that the frequency of sound waves changes if the source of sound and the observer are moving relative to each other.

If the two are approaching, then the frequency heard by the observer is higher; if they move away from each other, the frequency heard is lower.

There are many everyday examples of the Doppler effect - the changing pitch of police and ambulance sirens, or train whistles and racing car engines as they pass by. In every case, there is an audible change in pitch as the source approaches and then passes an observer.

Everyone has heard the increased pitch of an approaching police siren and the sharp decrease in pitch as the siren passes by and recedes. The effect arises because the sound waves arrive at the listener's ear closer together as the source approaches, and further apart as it recedes.

Light behaves like a wave, so light from a luminous object undergoes a Doppler-like shift if the source is moving relative to us. Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths - in other words, it is 'red-shifted'.

Since light travels at such a great speed relative to everyday phenomena (a million times faster than sound) we do not experience this red shift in our daily lives.

The red shift of a distant galaxy or quasar is easily measured by comparing its spectrum with a reference laboratory spectrum. Atomic emission and absorption lines occur at well-known wavelengths. By measuring the location of these lines in astronomical spectra, astronomers can determine the red shift of the receding sources.

However, to be accurate, the red shifts observed in distant objects are not exactly due to the Doppler phenomenon, but are rather a result of the expansion of the Universe.

Doppler shifts arise from the relative motion of source and observer through space, whereas astronomical redshifts are 'expansion redshifts' due to the expansion of space itself.

Two objects can actually be stationary in space and still experience a red shift if the intervening space itself is expanding.

A convenient analogy for the expansion of the Universe is a loaf of unbaked raisin bread. The raisins are at rest relative to one another in the dough before it is placed in the oven. As the bread rises, it also expands, making the space between the raisins increase.

If the raisins could see, they would observe that all the other raisins were moving away from them although they themselves were stationary within the loaf. Only the dough - their 'Universe' - is expanding.

Explanation:

calculate the molar mass of the following compounds

The ionic equation:

2Mn[tex]O^{- }_{4}[/tex] + 5 H2O4 + 6 [tex]H^{+}[/tex]⇄  2[tex]Mn^{2+}[/tex] + 10 CO2 + 8H2O

Molarity of KMnO4 is 0.0229M

Molarity:

Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of the amount of substance per unit volume of solution.

Formation of  the ionic equation:

2 × ( Mn[tex]O^{-}[/tex]4)  + 8 [tex]H^{+}[/tex] + 5[tex]e^{-}[/tex] ⇄ [tex]Mn^{2+}[/tex]  + 4 H2O )

5 × ( H2C2O4  ⇄ 2CO2  + 2[tex]H^{+}[/tex]  + 2[tex]e^{-}[/tex] )

_______________________________________

2Mn[tex]O^{-} _{4}[/tex]  + 5 H2C2O4  + 6[tex]H^{+}[/tex] ⇄ 2M[tex]n^{2+}[/tex] + 10 CO2 + 8 H2O

Now we have to find the molarity of the permanganate,

Volume = 28.97ml

mass = 0.1058g

molecular mass = 0.105 × 1000/ 28.97

                          = 3.62g

molecular mass = 158

Molarity of the solution = mass/ molecular mass

                                       = 3.62/ 158

                                       = 0.0229M

Therefore the ionic equation is 2Mn[tex]O^{- }_{4}[/tex] + 5 H2O4 + 6 [tex]H^{+}[/tex]⇄  2[tex]Mn^{2+}[/tex] + 10 CO2 + 8H2O and the molarity of the permanganate solution is 0.0229M.

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Equations represents the law of conservation of mass is 2H₂O → 2H₂ + O₂

Law of conservation of mass stated that energy neither be created nor destroyed called as law of conservation of mass and as the same no of each atom present in the both side of the reaction this reaction represents the law of conservation of mass so in the equation 2H₂O → 2H₂ + O₂ the energy cannot be created nor destroyed water can form 2 mole of hydrogen and 1 mole of oxygen which form water

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The first step in the preparation of magnesium metal is the precipitation of Mg(OH)₂ from sea water by the addition of Ca(OH)₂ the concentration of Mg₂ (aq) in sea water is 5.37 × 10⁻² m then ph at which [Mg₂ ] is decreased to 1.0 × 10⁻⁵ m is 1.27

Magnesium is the element and also one of the alkaline earth metal and metallic magnesium is prepared either by electrolysis of molten MgCl₂ or by metallothermic reduction of its halides by alkali or alkaline-earth metals

Here given data is concentration = 5.37 × 10⁻² m

We have to find pH= ?

pH = -log[HA]

pH = -log[Mg₂]

pH = -log[5.37 × 10⁻² m]

pH = 1.27

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A mixture is made up of two or more different substances. A mixture can contain solids, liquids and/or gases. The components in a mixture are not chemically joined; they are just mixed. That means we do not need to use chemical reactions to separate them.

According to the Chemical property of Alkanes, It is relatively unreactive which is responsible for generating electricity in diesel.

Alkanes do not react with strong acids, bases, oxidizing, or reducing agents (reductants). Alkanes combust (react quickly with oxygen), releasing energy, and making them useful as fuels.

Alkanes are saturated hydrocarbons that burn easily in the air with a blue non-sooty flame, releasing a large amount of heat and light energy. This heat energy can be used to heat water, cook food, and power machines in factories and thermal power plants. That is why they are such good fuels.

Methane, ethane, propane, and butane are all gases that can be burned directly as fuel.

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The total volume of a balloon that contains 2.00 moles of a gas mixture at STP is 44.8 L

It is given that

moles of gas = 2 moles

pressure of gas = 1 atm

temperature of gas = 0 °C = 273 K

According to ideal gas equation

PV = nRT

where P is the pressure, v is the volume, n is number of moles of gases, R is universal gas constant which has a value of R = 0.0820574 L•atm•mol-1K and T is the temperature

1 atm x V = 2 x 0.0820574 x 273

V = 44.8 L

Hence, total volume of a balloon is

44.8 L

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The final pressure of the reaction is found to be  49.81 torr and the half life of the decomposition of dimethyl ether is 1019.11 seconds.

The decomposition of dimethyl ether at 540 degrees Celsius is a first order reaction,

The relation between the initial pressure and final pressure in the first order reaction is,

-Kt = ln[P]/[Pₙ]

Where,

K is the rate constant,

P is the final pressure,

Pₙ is the final pressure,

t is the time period.

(a) the initial pressure is 135 torr, the rate constant K is 6.8 x 10⁻⁴ s⁻¹, time period is 1420 seconds,

Putting all the values in the formula,

-Kt = ln[P]/[Pₙ]

6.8 x 10⁻⁴ x 1420 = ln[135]/[Pₙ]

0.9656 = ln[135]/[Pₙ]

Here, 0.9656 ≈ 1, and e = 2.71

e¹ = 135/Pₙ

Pₙ = 135/2.17

Pₙ = 49.81 torr.

(b) The half life of a first order reaction is given by,

T = 0.693/K

Where,

T is the half life,

K is the rate constant,

Putting the values

T = 0.693/ 6.8 x 10⁻⁴

T = 1019.11 seconds.

So, half life is 1019.11 seconds.

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The extinguisher equipment best suited for extinguishing each type of fire is given below.

Small benchtop fire: Overturned beaker

Large fire on the floor: Fire extinguisher

Clothing fire: Fire blanket

Fire extinguishers are equipment that is generally used to put out fires in emergency situations.

In a fire extinguisher container, a liquified version of carbon dioxide gas is used to extinguish the fire.

For extinguishing fire in a small benchtop fire, the kind of fire extinguisher that is used is called overturned beaker.

Similarly, if a cloth catches fire, then putting a blanket on it or wrapping it around it can extinguish the fire. The reason being a blanket is a thick piece of cloth and does not allow air to pass through it quickly, Thus, it can be quite helpful in times of emergency.

On the other, if a large area catches fire, then a fire extinguisher must be used as it contains liquid carbon dioxide that excludes the oxygen from that area and keeps the fire under control.

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From the question, we would have the balanced ionic equation as; 2Ag^+(aq) + (ClO₄)₂^-(aq)  -------> 2Ag(ClO₄)₂ (s)

We know that a reaction equation is said to be balanced when the number of atoms of the elements on the reactants side is equal to the number of atoms of the same element on the products side. This is achieved by the process that we call an atom count. After we add the necessary stoichiometric coefficients that we think would help us to be able to obtain the  number of atoms that could be used to balance the equation as shown.

In this case, we are required to write the balanced reaction  equation for the reaction when AgC₂H₃o₂ and Ni(ClO₄)₂ are mixed in aqueous solution.

We would then have in this case;

2AgC₂H₃o₂ (aq) + Ni(ClO₄)₂ (aq) -------> 2Ag(ClO₄)₂ (s)+ Ni(C₂H₃o₂)2 (aq)

Net ionic equation is;

2Ag^+(aq) + (ClO₄)₂^-(aq)  -------> 2Ag(ClO₄)₂ (s)

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Mass percent of kcl in the solution is 12.45%

What is mass percent?

It's possible to express a degree using the mass percent. Additionally, it describes the element during a specific mixing. The mass percentage used to define the solution composition is common. It displays the amount of solute in a certain amount of solution. In terms of mass or moles, the number of solutes is indicated. We will learn the mass percent formula in this post along with several solved numerical problems.

(Component's mass minus Total Mass) times 100% Equals Mass Percentage or

(Solut's mass minus Solution's mass) times 100% equals the percentage of mass.

The mass percent formula is defined as the mass of each element in one mole of the compound, as well as the molar mass. With these masses, you can calculate each element's mass proportion.

Mass percent = mass of solute / mass of solution  x 100

                       =32/32+225 x1000

                        =12.45%

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The answers include the following:

Tendons are connective fibrous tissues that attaches muscle to bone and they have a bright white color together with a strong and smooth appearance which can be observed when studied.

Tendons are very important as they help in ensuring that the movement of parts of the body are easy due to its holding some structures such as ligaments in place. It is present in all bone joints due to its numerous functions in the musculoskeletal system of organisms.

The tendon is very flexible and binds the muscles in the body to other structures which is why it is referred to as a connective tissue and the above answers are the most appropriate.

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Grams of ammonium chloride are formed when 1.1 L of hydrogen chloride gas and 1.1 L of ammonia gas react. The density of the hydrogen chloride gas is 1.6 g/L and the density of ammonia is 0.77 g/L is 1.068 g.

given that :

volume of hydrogen chloride gas = 1.1 L

volume of ammonia = 1.1 L

Density of  hydrogen chloride gas = 1.6 g/L

Density of  ammonia = 0.77 g/L

the reaction is :

NH₃   +  HCl    --->    NH₄Cl

mass of HCl = D × v

                    = 1.6 × 1.1 = 1.76 g

mass of ammonia = 0.77 × 1.1 = 0.84 g

no. of moles of ammonia = mass / molar mass

                                = 0.84 / 36.4

                                = 0.02 mol

1 mole of ammonia produced 1  mole of NH₄Cl

therefore, 0.02 mol of ammonia produce = 0.02 mole of NH₄Cl

mass of NH₄Cl , ammonium chloride = no. of moles × molar mass

                                                             = 0.02 × 53.4

                                                             = 1.068 g

Thus, Grams of ammonium chloride are formed when 1.1 L of hydrogen chloride gas and 1.1 L of ammonia gas react. The density of the hydrogen chloride gas is 1.6 g/L and the density of ammonia is 0.77 g/L is 1.068 g.

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Learn sensible suggestions for making plans and organizing a backpacking trip, The surroundings or situations in which an organism life is referred to as the environment.

The environment can be defined as a sum general of all of the dwelling and non-living factors and their consequences that affect human lifestyles. while all residing or biotic factors are animals, flora, forests, fisheries, and birds, non-living or abiotic elements include water, land, daylight, rocks, and air.

Environment is the whole lot that is round us. it may be living or nonliving things. It includes physical, chemical and different herbal forces. dwelling things stay in their surroundings.

All of the physical surroundings on earth are known as the environment. The surroundings include the whole lot residing and the whole thing nonliving. The nonliving part of the surroundings has 3 essential elements the ecosystem, the hydrosphere, and the lithosphere.

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