check wether all the answers are correct or not. please?​

Solution :-

First of all for comparing any two quantities , they must be in same units .

Here one unit is in grams and other in milligrams .

So let's convert gram to miligram .

We know that 1 gram = 1000 mg.

So , 0.7g = 0.7 × 1000 mg = 700mg .

Clearly 711mg > 700mg .

Hence 711mg is Greater than 0.7 g .

Answer:

less than because 0.7 g is 1000 times than the decimal which 7111 mg is greater sorry if my explanation sucks but I know it's less

The decomposition of wastewater can lead to the following:

II. Eutrophication and algal blooms.

III. The development of dead zones.

A wastewater can be defined as a body of water that has been contaminated due to human use in homes, offices, schools, businesses etc.

Ideally, wastewater should be disposed in accordance with the local regulations and standards because they typically are unhygienic for human consumption or use. Thus, floor drain are used in the kitchen, bathroom and toilet to remove wastewater, so as to mitigate stagnation and to improve hygiene.

Generally, the decomposition of wastewater can lead to the following:

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If 250 mL of methane (CH4) effuses through a small hole in 48 s, the time required for the same volume of helium to pass through the hole is approximately 96 s.

The effusion rate of a gas is inversely proportional to the square root of its molar mass, according to Graham's law of effusion. In this case, we need to compare the effusion rates of methane and helium.

Since the volume is constant, we can use the ratio of their times of effusion.

Let's assume the molar mass of methane (CH4) is M1 and the molar mass of helium (He) is M2. According to Graham's law, the ratio of the effusion times is given by:

(time for methane) / (time for helium) = √(M2 / M1)

Given that the time for methane is 48 s, we need to find the time for helium. Rearranging the equation, we have:

(time for helium) = (time for methane) / √(M2 / M1)

By substituting the molar masses of methane (16.04 g/mol) and helium (4.00 g/mol), we can calculate:

(time for helium) = 48 s / √(4.00 g/mol / 16.04 g/mol)

(time for helium) = 48 s / √(0.25)

(time for helium) = 48 s / 0.5

(time for helium) = 96 s

Therefore, the time required for the same volume of helium to pass through the hole is approximately 96 seconds.

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The heat required to melt 22.9 g of solid diethyl ether (at its melting point) having a heat of fusion of  7.27 KJ/mol is 2246.43 J

Mole = mass / molar mass

Mole of diethyl ether = 22.9 / 74.12

Mole of diethyl ether = 0.309 mole

Q = n × ΔHf

Q = 0.309 × 7.27

Q = 2.24643 KJ

Q = 2.24643 × 1000

Q = 2246.43 J

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Answer:

The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools like yours!

Explanation:

Answer:

The electricity that flows to our homes is generated in power stations. From here, it flows through large transmission lines, which carry it to substations. Finally, distribution lines carry electricity from substations to houses, businesses, and schools like yours!

Explanation:

I get this from a professional

Based on the observations, we can infer the identities of the unknown solutions as follows:

Solution A: NaCl, as there was no reaction observed with any of the other solutions.

Solution B: \(CaCl_2\), as it did not react with \(Na_2CO_3\) or NaOH but formed bubbles when mixed with \(Na_2CO_3\) .

Solution C: \(Na_2CO_3\), as it did not react with \(CaCl_2\) or NaOH but turned white and opaque when mixed with \(CaCl_2\) .

Solution D: NaOH, as it did not react with \(CaCl_2\) or \(Na_2CO_3\) but made solution A translucent when mixed.

The double displacement reactions that could occur among the given solutions and their balanced chemical equations are:

\(CaCl_2 (aq) + Na_2CO_3 (aq) = CaCO_3 (s) + 2NaCl (aq)\)

\(CaCl_2 (aq) + NaOH (aq) = Ca(OH)_2 (s) + 2NaCl (aq)\)

\(Na_2CO_3 (aq) + NaOH (aq) = 2Na_2O (aq) + H_2O (l)\)

\(NaCl (aq) + CaCO_3 (s) = CaCl_2 (aq) + Na_2CO_3 (aq)\) (no reaction observed)

\(NaCl (aq) + Ca(OH)_2 (s) = CaCl_2 (aq) + 2NaOH (aq)\) (no reaction observed)

\(NaCl (aq) + Na_2O (aq) = 2NaCl (aq) + Na_2CO_3 (aq)\) (no reaction observed)

A double displacement reaction is a type of chemical reaction in which two compounds react, and the cations (positively charged ions) and anions (negatively charged ions) of the two reactants switch places, resulting in the formation of two new compounds.

The general equation for a double displacement reaction can be written as:

AB + CD → AD + CB

In this reaction, A and C are the cations, while B and D are the anions. When the reaction occurs, A will combine with D to form AD, while C will combine with B to form CB.

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Answer:

For organic compounds, carbon and hydrogen are listed as the first elements in the molecular formula, and they are followed by the remaining elements in alphabetical order. For example, for butane, the molecular formula is C 4 H 10.

Explanation:

Answer:

h20

Explanation:

The wavelength of the light is approximately 500 nm. The energy of the photon of light is approximately 6.56 x 10-20 J.

Answer: Question 1:The formula relating wavelength, frequency, and the speed of light is given by:c = fλHere,λ = wavelength, f = frequency, c = speed of lightI. n the problem, frequency is given as 5.98 x 1014 s-1. Therefore, using the formula, the wavelength of light can be calculated as follows:λ = c/f= (3 x 108 m/s)/(5.98 x 1014 s-1)≈ 500 nm

Therefore, the wavelength of the light is approximately 500 nm.

Question 2:The formula relating energy and frequency of light is given by:E = hfwhereE = energy of photonh = Planck's constant = 6.626 x 10-34 J s (Joule seconds)f = frequency of lightIn the problem, the frequency of light is given as 9.89 x 1013 Hz. Therefore, using the formula, the energy of the photon of light can be calculated as follows:E = hf= (6.626 x 10-34 J s) x (9.89 x 1013 Hz)≈ 6.56 x 10-20 J

Therefore, the energy of the photon of light is approximately 6.56 x 10-20 J.

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Answer:

(o) Al + NaOH + H2O -NaAlO2 + H2.

When aluminum oxide Al 2 O 3 reacts with sodium hydroxide solution, it forms sodium aluminate and water H 2 O . This reaction takes place at a temperature of 900 - 1100 ° C

a.) 1 foot = 0.33 yard.

b.) 1 year = 365 days

c) 1 yard = 0.18 rod

d) 1 foot= 0.0001893 mile

e) 1 day = 24 hours

f) 60 seconds = 1 minute

According to the international system of measurement, the conversion factor needed for the following unit conversions are as follows:

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The volume of carbon dioxide that would be produced by this reaction if methane were consumed is: \(CH4 + 2O2 → CO2 + 2H2O\)

When methane gas and oxygen gas react, they produce water vapor and carbon dioxide gas. The volume of carbon dioxide produced by this reaction depends on the amount of methane gas that is consumed.

If 100 mL of methane gas were consumed, then the volume of carbon dioxide produced would be 44 mL. This reaction can be expressed in the following equation:
\(CH4 + 2O2 → CO2 + 2H2O\)

The mole ratio of methane gas to carbon dioxide gas produced by this reaction is 1:1. This means that if 100 mL of methane gas is consumed, then 44 mL of carbon dioxide gas will be produced. This is because 44 mL of carbon dioxide is equivalent to 1 mole of carbon dioxide gas, and 100 mL of methane gas is equivalent to 1 mole of methane gas.

Therefore, if 100 mL of methane gas is consumed in this reaction, then 44 mL of carbon dioxide gas will be produced. This can be determined by using the mole ratio of methane gas to carbon dioxide gas, which is 1:1.

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Answer:

D

Explanation:

A displacement equation is simply when one atom is replaced by a different atom.

In this case, the white square is replaced by the grey circle, so D is the answer.

Though it is tempting to say so, A is not the answer because it is a double displacement.

Specific heat capacity if the unknown metal is -0.450 J/(g°C).

The measure of heat complexity needed to increase the temperature of a single unit of substance mass by one degree Celsius is known as specific heat capacity. This factor is crucial in determining how much energy is required for temperature changes in a given substance.

q = mcΔT

where q is the change in thermal energy, m is the mass of the metal, c is its specific heat capacity, and ΔT is the change in temperature.

In this case, we have:

m = 150 g

ΔT = 22.4°C - 12.6°C = 9.8°C

q = -662 J

Plugging in the values,

-662 J = (150 g) c (9.8°C)

Solving for c, we get:

c = -662 J / (150 g × 9.8°C) = -0.450 J/(g°C)

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Displacement Reaction

The baseline width of the band, longitudinal diffusion in seconds is 8.325sec and σ is 0.5608 ×\(10^{-3}\)

In Van diameter equation

B (longitudinal diffusion) = 2yDm

where, y constant = 0.7

Dm = diffusion coefficient = 3.7 × \(10^{-9}\)

B = 5.18 × \(10^{-9}\) m^2/s

linear velocity = L/tr

L = 21cm

tr = Vr/ Fc

tr= 0.222/1.60

tr= 0.13875 = 8.325sec

u = L/tr = 0.25/18.45 = 0.02005

Van diameter equation

H = B/tr = 5.18 × \(10^{-9}\) /0.2008 = 257.968× \(10^{-9}\)

σ = \(\sqrt{16*0.13875*0.13875/9.6911*10^{5} }\) = 0.5608 ×\(10^{-3}\)

The term "diffusion" refers to the overall movement of anything (such as atoms, ions, molecules, or energy) typically from a location of higher concentration to a region of lower concentration. Gibbs free energy or chemical potential gradients act as the driving force behind diffusion. As with spinodal decomposition, it is possible for a substance to diffuse "uphill" from one area of lower concentration to another.

The term "diffusion" is used frequently in a variety of disciplines, such as physics (particle diffusion), chemistry, biology, sociology, economics, and finance (diffusion of people, ideas, and price values). A substance or collection that is undergoing diffusion expands out from a place or location where there is a larger concentration of that substance or collection. This is the fundamental concept of diffusion, which is shared by all of these.

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Answer:

a. The temperature should be increased.

b. 342.86K

Explanation:

Using Charles law equation as follows:

V1/T1 = V2/T2

Where;

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question, the following information were given:

V1 = 210mL

V2 = 360mL

T1 = -73°C (-73 + 273 = 200K)

T2 = ?

Using V1/T1 = V2/T2

210/200 = 360/T2

Cross multiply

200 × 360 = 210 × T2

72000 = 210T2

T2 = 72000/210

T2 (new temperature) = 342.86K

In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.

TPolysaccharides, which are the most ubiquitous carbohydrates in nature, serve a number of functions, including energy storage and incorporation into plant cell walls.

Tens to thousands of monosaccharides are joined together via glycosidic linkages to form large polymers known as polysaccharides. The three most frequent polysaccharides are starch, glycogen, and cellulose. They are collectively referred to as homopolymers because, after complete hydrolysis, each of these three exclusively yields one type of monosaccharide (glucose).

Heteropolymers may also comprise sugar acids, amino sugars, or non-carbohydrate substances in addition to monosaccharides. Polysaccharides, a class of non-reducing carbohydrates, are not sweet and do not change. 

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Answer:

1. 264.369

2. 1772.65

3. 3.25

4.488

5. 0.164525

Explanation: I just added 0's to the ones that didnt have as many decimals which made it easy.

Answer:

Im confused. Do you need help with something?

Explanation:

Answer:sheshhh sayless XD

Explanation:

Answer:

Explanation:

Cuz the color is a light yellow and water to make it loose color

The mixing of two different liquids together to form a new mixture is called a solution.

The correct option is acid.

In a solution, there are two components which are known as solute and solvent. In which solute is less in amount and solvent is more in an amount which is water.

According to the question, the smoothie turns the color to pink from purple because lemon act as an acid and changes the ph of the solution.

Hence, the Lemon act as an acid.

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The combination of an asymmetrical alkyne and hydrogen gas (H₂) in the presence of a Lindlar catalyst typically results in the partial reduction of the alkyne to yield a cis-alkene.

The Lindlar catalyst, also known as Lindlar's palladium catalyst, consists of palladium deposited on calcium carbonate or barium sulfate and then poisoned with lead acetate or quinoline.

This modified palladium catalyst is selective for the partial hydrogenation of alkynes to cis-alkenes, without further reduction to the corresponding alkane.

The mechanism of the Lindlar catalyst involves the adsorption of the alkyne onto the surface of the catalyst, followed by the reduction of the alkyne to a cis-alkene via the formation of a metal-carbon intermediate.

The lead acetate or quinoline acts as a poison to prevent the over-reduction of the alkyne to the corresponding alkane.

Overall, the reaction of an asymmetrical alkyne with hydrogen gas and Lindlar catalyst produces a cis-alkene with stereochemistry that is determined by the starting alkyne.

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The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:

Compute Mg(OH)2's molar mass:

mol Mg = 24.31 g

O = 15.99 g/mol

H = 1.01 g/mol

Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.

Determine how many moles of Mg(OH)2 there are:

Mass / molar mass = number of moles

1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.

Determine the solution's molarity:

Molarity is equal to the moles of solute per litre of solution.

Molarity = 1.925 moles/1.2 litres = 1.60 M

As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.

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Answer:

Compounds have a homogenous composition of atoms even thou they are different atoms . they are always joined in the same ratio and cannot be separated by physical methods. May lose their property as they undergo chemical changes generally.

Whereas mixture are formed by uneven ratio of atoms and these are made and separated by physical processes .No new substances are formed in mixtures .The constituents of a mixture do not lose their properties

Explanation:

Answer:

answer A

Explanation:

Atomic radius...

The following elements do not affect electronegativity A) Atomic radius.

Electronegativity is a chemical belonging that describes the tendency of an atom or a practical group to attract electrons towards itself. The electronegativity of an atom is affected by its atomic quantity and the gap that its valence electrons live from the charged nuclei.

Atomic radius or Atomic Radii is the overall distance from the nucleus of an atom to the outermost orbital of its electron. We define the atomic radius of a chemical element as The implied or commonplace distance from the centre of the nucleus to the boundary of the surrounding shells of electrons.

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Answer. Because when magma cools, crystals form because the solution is super-saturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystal shave enough time to grow and become large. :)

Explanation: I Hope this works! Have you tried the magic crystals It is so cool you get to see it grown. But you have to put the things in the contanier. FUN PART IS, YOU GET TO SEE IT GROW! :)))