How do you measure pH strength?.

The molar mass of the unknown gas is 96.7g/mol so the correct option is (a).

The molar mass of a synthetic compound is delineated as the mass of a sample of that compound detached from a piece amount relevant that is the number of blemishes within the sample, calculated in moles. The molar mass is a size, not microscopic, characteristic of wealth. Molar mass is of excellent importance when starting an experiment.

Molar mass can be calculated by the under-mentioned:

Density = M*P/R*T ---------->(1)

Density = 4.38g/L

Where,

M = molar mass of gas

P = pressure of the gas

R = universal gas constant

T = temperature (273K)

Therefore,

Molar mass = density * universal gas constant * temperature /pressure

Molar mass = 4.38g/L*.0821 L atm/mol K *273K / 1atm

= 97g/mol

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A mixture with H₂ and He exerts a total pressure of 0.480 atm. If there is 1.00 g of H₂ and 1.00 g of He in the mixture, the partial pressure of the helium gas is 0.158 atm.

The partial pressure of a gas is defined as the pressure exerted by a individual gas in the gas mixture. The partial pressure for individual gas is calculated using the formula

P(gas)=P(total)×X(gas) (i)

Where, X(gas)- Mole fraction of the gas

mole fraction is calculated using the formula

mole fraction=(moles of individual compound/total moles)

The molar mass of H₂ is 2 g/mol and of He is 4g/mol. Hence moles of H₂ and He is

mol of H₂=1 g×(1 mol/2 g)

=0.50 mol

mol of He=1 g×(1 mol/4 g)

=0.25 mol

Total number of moles are

total mole=(0.50+0.25) mol

=0.75 mol

The mole fraction of He gas is

mol fraction of He=(0.25 mol/0.75 mol)

=0.33

Hence, the partial pressure of He gas after plugging value in equation(i) is

P(He)=0.480 atm×0.33

P(He)=0.1584 atm

P(He)=0.158 atm

Therefore, the partial pressure of helium(He) gas is 0.158 atm.

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Color of apple and cranberry juice is yellow and red respectively as the two colors of  juices are different each color has it's own λ max according to Beer's law and hence apple juice contributes to  color of cranberry-apple juice .

The Beer's law states that the absorbance is directly proportional to the concentration of a solution that is,A∝C .Most substances follow Beer's law from low to moderate temperature ranges only.It is not followed well in case of saturation effects which are present in highly concentrated samples.

Due to the direct relation between absorbance and concentration , absorbance is preferred over transmittance for recording the spectra.

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Answer:

Joule

Explanation:

This is the answer

Passing a comb through her hair allows the comb to bend the stream of water is option B. by giving the comb an electrical charge.

The comb draws the movement of water in an equal way. The price of the comb attracts the molecules of water within the flow. due to the fact the molecules inside the circulation may be moved without difficulty, the circulate bends toward the comb. because water molecules are polarized molecules, the effect is stronger than with dust.

While a comb is run thru your hair charges pass between your hair and the brush, so the comb turns into charged both definitely or negatively, and the hair is oppositely electrical charge.

The brush, blanketed in negatively charged electrons, becomes negatively charged as nicely, and your hair is left with a high-quality fee. This “separation of fee” is the purpose of the collection of effects we call static strength. If gadgets have specific prices, they appeal to (or pull towards) every other.

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Disclaimer:- your question is incomplete, please see below for the complete question.

Greta passed a comb through her hair several times. She then placed the comb next to a stream of water flowing from a faucet. Greta observed the stream of water bend toward the comb. How did passing a comb through her hair allow the comb to bend the stream of water?

A. by making the comb more absorbent.

B. by giving the comb an electrical charge.

C. by increasing the thermal energy of the comb.

D. by breaking some of the chemical bombs in the comb.

Answer:

I think it's the auditory cortex or the temporal lobe

Sugar dissolves in water because intermolecular connections between the slightly polar sucrose molecules and the polar water molecules release energy.

The weak bonds that form between the solute and the solvent compensate for the energy needed to disrupt the structure of both the pure solute and solvent. When sugar dissolves in a liquid, the sugar molecules take up the space between the water molecules.

As a result, they don't contribute any extra room. Thus, the volume of the solution does not change. Sugar dissolves more quickly in hot water than it does in cold water because hot water has more energy. The molecules of water move more swiftly and energetically when it is heated.

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Instruments used for calibrating flowmeters for single-phase liquids include:

Special equipment used may include a:

Procedures used in the calibration process may include:

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The radioisotope that would decay the most ought to be Fr-220. Option C

The term half life of the radioactive isotope has to do with the time that it would take for us to have only half of the number of the original radioactive atoms to be left. We have to find the half life of each of the isotopes so that we can be able to get the one that has decayed the most.

For P - 32

Half life = 14.3 days

Using;

N/No = (1/2)^t/[tex]t_{\frac{1}{2} }[/tex]

N = amount present at time t

No = initial amount

t = time taken

[tex]t_{\frac{1}{2} }[/tex] = half life

Hence;

N/10 = (1/2)^28/14.3

N =  (1/2)^28/14.3 * 10

N = 2.6 g

For Kr-85

Half life 10.76 years or 3927.4 days

N/10 =  (1/2)^3927.4/28

N =  (1/2)^3927.4/28 * 10

N = 5.97 * 10^-47 g

For Fr-220;

27.40 seconds or 0.00032 days

N/10 =  (1/2)^0.00032 days/28 days

N =  (1/2)^0.00032 days/28 days * 10

N = 10 g

For  I-131

Half life = 8 days

N/10 =  (1/2)^8/28

N = (1/2)^8/28 * 10

N = 8.2 g

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Since carbon dioxide has the highest molecule mask, we will thus state that the rate of refuge in will be the slowest for this gas. So, based on the choices, we can conclude that option C is the right response.

According to Charles' law, when the pressure is held constant, the volume of a given amount of gas is precisely proportional to its kelvin-scale temperature. The balloon's volume grows as the temperature rises. In reality, assuming pressure is constant, they are proportionate to one another. However, there is a catch: you need to utilize what is known as absolute temperature in order to do computations. The balloon's volume grows as the temperature rises.

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Three instances of exponential growth are the spread of viruses, the financial sector, and nuclear chain reactions.

It ought to, given how challenging it is for the average mind to comprehend exponential development (also referred as compound growth). But the key to effective investing is understanding it. The eighth miracle of the world, according to Albert Einstein, is compound interest.

A population will expand exponentially if given unlimited resources, including food, water, land if necessary, moisture, carbon, and other natural elements. As a population expands, exponential expansion occurs, substantially accelerating the growth rate.

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When a large rainstorm hits your town and it rains all day, is a stage of water cycle known as precipitation.

The water cycle shows the continuous movement of water within the Earth and atmosphere.

There are three main parts to the water cycle and they are listed below:

The evaporation of water occurs when the water on earth surface such as lakes, rivers, ocean, etc, gains heat, turn into water vapour and escapes into the atmosphere.

The next stage after evaporation in water cycle is condensation, the warmer water vapour comes in contact with cooler air in the atmosphere or clouds, lose heat and form water droplets which accumulates in the cloud.

The last stage in the water cycle is precipitation; when the condensed water droplets in the cloud saturates the cloud, it precipitates in form of rain fall, and the process continues to infinite.

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Since there are four groups encircling the sulphur atom, the electron geometry is tetrahedral ( 2 lone pairs and 2 hydrogens). Due to the lone pair repulsion of the S-H bonds, the hydrogen sulfide's molecular geometry is bent, something I hadn't encountered in university. As a result, the angle will be much less than 109.5 degrees, or roughly 92 degrees.

The difference between molecular and electronic geometry is that the latter is the geometry of the localised electron densities, whilst the former simply considers the bound substituents around the sulphur, such as the hydrogens ( bonds and lone pairs).

Four of the five geometries linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral are referred to as electron group geometries. The form of the molecule is changed but the electron geometry remains the same if one or more of the bonding pairs of electrons are swapped out for a lone pair.

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The two everyday examples of the thermal energy of a substance being increased are the temperature rising of the sun and cooking.

Thermal energy is defined as the type of energy that causes the movement between f molecules within an enclosed system or environment. When this energy flows through the system it is referred to as heat.

In our daily activities, there are examples of objects that shows rise in their thermal energy. They include the following:

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These elements like carbon, oxygen, nitrogen, etc are called the major elements.

Major elements are those elements that are found more than 1% in the atmosphere. These elements are higher in quantity than the other elements.

These are also known as major elements because they are majorly found in the genetic material of living beings.

It can be said that these are the element by which the living beings are formed. Genetic material like DNA or RNA have these materials and are abundant in the body.

They are also known as CHON elements in short.

Hence, with all that we can conclude that these elements are the major elements.

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HCO₃⁻ is most likely present if you add acid to a solution and then bubbles form vigorously.

The body uses bicarbonate, an electrolyte and negatively charged ion, to assist keep its acid-base (pH) balance. In order to maintain electrical neutrality at the cellular level, it also collaborates with the other electrolytes (sodium, potassium, and chloride). This examination examines the total concentration of blood carbon dioxide (CO₂), which primarily takes the form of bicarbonate (HCO₃⁻). The majority of the CO₂is a byproduct of many metabolic activities.

The main organs responsible for controlling blood pH by eliminating extra bicarbonate are the lungs and kidneys.

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Answer:

below

Explanation:

From periodic table the shell electrons are 2 8 and 6 so:

   1s2          2s2   2p6          3s2   3 p4        for sulfur

the noble gas config is then  (neon + 6) =

     [Ne]   3s2   3p4

The tendency of sound waves to bend when they pass from one medium to a different medium is known a refraction.

In diffraction, a sound wave is bent or stretched out in a single medium where the sound speed remains constant. Refraction is a crucial instance in which sound waves arc or diffuse. Due to variations in the wave's speed, a sound wave bends in this occurrence.

A wave bends as it travels along the edge of an object or through an aperture. It is referred to as diffraction. When a wave transitions from one medium to another at an angle, it also bends. It's known as refraction.

Thus, The option A is correct.

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Because they contain a large number of hydrogen-related electrons, carbohydrates and fats are regarded as high-energy foods. Carbohydrates include the sugar, starch, and fibre present in everyday.

One of the three micronutrients that the human body uses to produce energy is this one. At the molecular level, carbon, hydrogen, and oxygen atoms are characteristics of carbohydrate biology. The first element encountered throughout the tour of the periodic table of elements is hydrogen, which is represented by the chemical symbol H. Of all the elements in the universe, it is the most fundamental and first. Ninety percent of all atoms in the universe are hydrogen atoms, making it the periodic table's lightest element.

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203 ml of LiOH are required to reach the equivalence point.

Titration is a commonplace laboratory technique of quantitative chemical analysis to decide the attention of a recognized analyte. A reagent, termed the titrant or titrator, is prepared as a standard answer of known attention and extent.

76 ml, 0.400 M HCOOH

Number of moles(HCOOH) = (76 × 0.4)

                                            = 30.4 m mol

Reaction equation:-

HCOOH + 4OH ---------> HCOOLi + H₂O

∵ Molar Ratio = 1:1

Hence, the Moles required of LiOH to reach the equivalence point = 30.4 m mole

Volume (LiOH) = moles / molarity = 30.4/0.150

                         = 30.4 × 10⁻³ /0.150

                        = 203 ml.

Titration is the sluggish addition of one solution of an acknowledged concentration to a regarded quantity of any other answer of an unknown awareness till the reaction reaches neutralization, which is frequently indicated through a shade alternate.

The motive of the titration is the detection of the equivalence point, the factor at which chemically equal quantities of the reactants had been mixed. the quantity of reactants that have been blended at the equivalence point relies upon the stoichiometry of the reaction.

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A.  Temperature leads to weathering of rocks as rocks expand and contract when they are heated and cooled which causes them to break; option B is correct.

B. The part of the Earth that experiences physical weathering is the crust; option D is correct.

C. The last stage of physical weathering in rocks is sand; option A is correct

D. A crack must be present on a rock that undergoes frost wedging; option B is correct.

Physical weathering is a form of rock weathering in which large rocks are broken down into smaller rock particles without a change occurring in the chemical composition of the rocks.

Agents of physical weathering include wind, water, ice, and heat.

Some forms of physical weathering include:

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The titrant must be used to ensure that when added to the buret it will not be diluted with water.

As with pipettes, burettes should be rinsed with distilled water followed by the filling solution to avoid contamination problems.

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Both will conduct electricity.

Solution:

Both compounds are ionic compounds and in molten or in aqueous solution, both will provide the ions. Ions are conducting chemical species.

As we see the position of K, I, Cu, and Cl in the periodic table, we observe that -

K, Cu are metals

I, Cl are nonmetals.

So when compounds are formed by metals and nonmetals by electrostatic attraction force they are ionic compounds and they are conducting material.

Substances that are insoluble in water and do not conduct electricity are composed of non-metallic atoms. Metals are to the left of the line, non-metals are to the right of the line, and the elements immediately next to the line are semimetals. The physical and chemical properties of the atoms of an element depend on their electronic configuration.

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The beryllium, the first element in group 2(a), is the most metallic element in the group. this is false . Beryllium is not the most metallic element in group 2(a)

The Beryllium is the element of group 2(a) and is metal but not the most metallic element. The element which is most metallic element is radium . The is when we move from top to bottom in a group the metallic character increases. the beryllium is on the top so, it is least metallic character.

Thus, The beryllium, the first element in group 2(a), is the most metallic element in the group. this is false . Beryllium is not the most metallic element in group 2(a)

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The molarity of copper II sulphate in the diluted solution would be 7.14 x 10^-3 M , if 4 ml of 0.0259 m cuso4 is diluted to 10 ml with pure water.

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Answer:

Discharge

Explanation:

this is the answer

64.6 g of Al2O3 are created from 30.4 g of O2. The highest amount of aluminum oxide that may be produced in this reaction is 57.4 g, with aluminum acting as the limiting reagent.

The mass of an object can be calculated by multiplying its density by its volume because density is a measure of mass per unit of volume. For aluminum products, high pressure die casting is a quick and effective method of mass production. A steel mold is heavily pressurized as molten aluminum is poured into it, producing 1,000 to 1,000,000 pieces of high pressure die casting aluminum annually. Sodium aluminate and water are created when aluminum oxide interacts with sodium hydroxide. The temperature where this reaction occurs is between 900 and 1100 °C.

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Digital gold.

Silicon is the material of choice in the chip industry. Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron.

Answer:Unlike the metals normally used to conduct electrical currents, silicon is a 'semiconductor', meaning that its conductive properties can be increased by mixing it with other materials such as phosphorus or boron. This makes it possible to turn an electrical current on or off.

Explanation: