the criterion for whether a reaction proceeds spontaneously is delta g not delta g not, because delta g takes into account the concentrations of the substrates and products

According to the solubility chart below  the solubility of Argon gas is not dependent on temperature.

The maximum amount of a chemical that will dissolve in a given amount of solvent at a given temperature is referred to as its solubility.

The solubilities of various compounds vary greatly, and this property of a particular solute-solvent pair is evident.

The addition of sugar cubes to a cup of tea or coffee serves as an example of a solution. A property that facilitates the dissolution of sugar molecules is solubility. Solubility is the property of a substance (solute) to dissolve in a certain solvent.

Solutes are divided into three categories: highly soluble, sparingly soluble, and insoluble based on the concentration at which they dissolve in a solvent.

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The volume of the object is 8 cm³ and the density of the object is 3 g/cm³.

Archimedes' principle states when an object is partially or fully immersed in a fluid, it displaces the portion of the fluid equal to its own weight.

The volume of the object = volume of the water in the cylinder displaced

volume of the object = 30 cm³ - 22 cm³

volume of the object = 8 cm³

The density of the object is calculated from the ratio of the mass and volume of the object.

density = mass/volume

density of the object = 24 g / 8 cm³

density of the object = 3 g/cm³

Thus, the volume of the object is 8 cm³ and the density of the object is 3 g/cm³.

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The atomic radius of Magnesium (mg) that has an hcp crystal structure, a c/a ratio of 1. 624, and a density of 1. 74 g/cm3 is1.6×〖10〗^(-8) cm.

The number of atoms that are present in each unit cell of a specific hexagonally closed-packed crystal with six atoms is known as hexagonal closed packing, or HPC. It is written as

ρ=(n×A)/(V_c×N_A )

Where

ρ is the density

n is the number of atoms

N_A is Avogadro’s constant (6.023×〖10〗^23 atoms/mol)

A is the molar mass of magnesium (24,305g/mol)

V_c is the volume of the crystal

V_c   can be calculated using the expression below

V_c=(a^2 c×3√3)/2

a is the short crystal dimension (2R)

c is the long crystal dimension

1.624=c/a

c=1.624a

Putting the values in the above equation

V_c=(a^2×1.624a×3√3)/2

V_c=((2R)^2×1.624(2R)×3√3)/2

V_c=(4R^2×3.248R×3(1.73))/2

V_c=(67.428R^3)/2

V_c=33.71R^3  〖cm〗^3/(unit cell)

Substituting values into the density equation

ρ=(n×A)/(V_c×N_A )

1.74=(6×24.305)/(33.71R^3×6.023×〖10〗^23 )

Making R the subject of formula

R^3=145.83/(1.74×33.71×6.023×〖10〗^23 )

R^3=145.83/(3.53×〖10〗^25 )

R^3=4.127×〖10〗^(-24)

R=∛(4.127×〖10〗^(-24) )

R=1.6×〖10〗^(-8) cm

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Using the density, the mass of sulfuric acid is 2292.82 grams.

We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as

ρ = m / V

where ρ is density, m is mass and V is volume

From the question above, we know that

ρ = 1.31 g/mL

V = 1 gallon = 4546.09 mL

% sulfuric acid = 38.5%

By substituting the following parameters, we get total mass

ρ = m / V

m = ρ .V

m = 1.31 . 4546.09

m = 5955.38 grams

Find the sulfuric acid mass

ms = %sulfuric acid x m

ms = 38.5% x 5955.38

ms = 2292.82 grams

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A formula that lists the relative amounts of the constituent components in a compound without specifying the number or configuration of atoms. The empirical formula is , thus option (d) is correct.

The formula that shows the ratio of elements present in the compound, but not the actual numbers of atoms found in the molecule. Empirical formula seems to be a compound chemical formula that only specifies the ratio of elements it contains, not the precise number as well as arrangements of atoms. This corresponds to compound elements with the smallest whole number ratio.

Empirical, molecular as well as structural formula are still the three basic category the easiest whole number ratio of a compound is shown by empirical formula. The number including each variety of atom in a molecule is shown by molecular formula, and the bonds between atoms in a molecule is shown by structural formula.

Thus, option (d) empirical formula  is  C₄H₂O₂ correct.

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Answer:

1 dollar

Explanation:

Answer:

C

Explanation:

A is a question

B is an opinion statement because it says "Florists put cut flowers in sugar longer, so flowers in sugar water stay fresh longer". When you can make a statement like that about anything.

C is a conclusion. It seems as if they already compared it and have came out with a 'conclusion'.

D. is an opinion.

Melting (from solid to liquid), freezing (from liquid to solid), evaporation (from liquid to gas), and condensation are examples of matter transformations (changing from gas to a liquid).

Melting is the process by which a material transforms from its solid state into its liquid state. Freezing is the transition of a material from its liquid state into its solid state. Evaporation is the process by which a material transforms from its liquid state into its gaseous state. Melting is the process of converting a solid into a liquid. The melting point is the temperature at which a material transforms from a solid to a liquid. At 0 degrees Celsius, water melts.

Heat is applied in this pattern of solid to liquid to gas in order to cause the phase transition.

Condensation is the process by which a material transitions from its gaseous state into its liquid state. Sublimation is the process by which a solid transitions directly from its solid state to its gaseous state.

A physical transition from one state of matter to another, such as from solid to liquid or from liquid to gas, is referred to as a change of state, sometimes known as a phase change.

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Answer:

It is true.

Explanation:

Its a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero

Answer: 3

Nucleon number is 31

Explanation:

The molar mass of camphor is 152 g/mol.

We have given that,

P = 12 torr or 0.01579 atm

1 atm = 760 torr

Density = 0.0829 g/l

R = 0.0821 L.atm/mol.K

And temperature is

T = 273° K + 80° K

  = 353° K

As we all know,

PV = nRT

so, PV = mass × R × T / molar mass

also, P = mass × R × T / volume × molar mass

here, mass/ volume = density (d)

P = dRT / molar mass

Now putting the values and simplify,

0.01579 = 0.0829 × 0.0821 × 353 / molar mass

molar mass = 152.156 g/mol.

thus, the molar mass of camphor is 152 g/mol.

The molar mass of a chemical substance is determined in chemistry by dividing the amount of a substance with that compound by the quantity of that compound, which is the number of moles in exactly that sample, which is measured or calculated in moles.

In contrast to molecular properties, a substance's molar mass is a bulk property. The compound is present in many different forms, each with a different mass as a result of the isotopes. The molar mass is the average of these masses.

The molar mass is often calculated using the standard atomic weights and is therefore an average for Earth and a function of the relative abundance of the constituent atoms' isotopes.

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The vapor pressure of the solution in question 3 at this temperature is

[tex]6.72[/tex] ×[tex]10^{-3}[/tex] torr.

The pressure that a vapor exerts on its condensed phases (solid or liquid) in a closed system at a specific temperature is referred to as the equilibrium vapor pressure (or vapour pressure in English-speaking nations other than the US; see spelling variations).

An indicator of a liquid's evaporation rate is the equilibrium vapor pressure. It has to do with how easily liquid-borne particles tend to elude detection (or a solid). Volatile is a term used to describe a chemical that, at room temperature, has a high vapor pressure.

Vapor pressure is the force that a vapor cloud exerts over a liquid surface. The kinetic energy of a liquid's molecules rises as its temperature climbs.

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the parameter plotted on the x-axis of a mass spectrum, in the form 'mass to charge ratio'

Mass spectroscopy is the analytical tool useful for measuring the mass to charge ratio means m/z of one or more molecule present in a sample it is a technique in which the separates ionized particles such as atom, molecules  by using differences in the ratio of their respective mass and also can be used to determine the molecular weight of the particles  and in the mass spectrum the x axis are shown mass to charge ratio and y axis are shown abundance or relative intensity

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The correct order that depicts the process of photosynthesis would be carbon dioxide + water ---> glucose (chemical energy) + oxygen.

Photosynthesis is a biological process whereby green plants are able to make use of solar radiation to convert inorganic substances in the form of water and carbon dioxide to carbohydrates.

In addition to carbohydrates, oxygen gas is produced as a by-product of the process. The process happens through a series of chemical reactions. Some reactions require light while some do not.

The entire process is summarised by the following equation:

[tex]6CO_2 + 6H_2O --- > C_6H_1_2O_6 + 6O_2[/tex]

The equation can be rewritten in word form as:

carbon dioxide + water ---> glucose (chemical energy) + oxygen

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Answer:

Ice: solid and rigid. Water: Liquid and sloshy Gas: light and not dense.

Explanation:

Up ^

Answer:

just be yourself , if they are a good person that you want to be your friend they would support you and care about what you have to say.

Explanation:

We know that the equilibrium constant is a value that shows us the position to which the equilibrium position would switch when a constraint is imposed. We know that the imposition of a constraint would cause the equilibrium position to shift to the left or to the right in such a way that seeks to annul the change that is causing it.

We know that if a product is added, the equilibrium position would shift to the left and more reactants are produced. On the other hand, if a reactant is added, the equilibrium position would shift to the right and more products are added.

Having said this;

If we add the H3O^+ ion, then the equilibrium would shift to the left and if it is removed the equilibrium would shift to the right.

If we add the OH^- ion, the equilibrium would shift to the left and when it is removed the equilibrium would shift to the right.

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As per given statement as follows:-

generally, independent variables are the one manipulated by investigators and study effects. Dependent variables are the measurements and observation by the data collected.

Experimental group are the participants exposed to the  independent variable and control group the participants treated same as experimental group but not  exposed to independent variables.

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Hi Steven!

So yet again, we find ourselves doing math when we thought the class was chemistry!  For this we're going to do a standard conversion that we do a lot in GenChem, converting from grams to moles.

In this case, we're starting with 0.171g N2O.  Let's go ahead and convert that to moles by using the molar mass, which is 44.013 g/mol.

.171 g N2O * (1 mol N2O / 44.013 g N2O) = 0.00389 mol N2O

So we got to moles of dinitrogen monoxide - now we need to know how many moles of nitrogen!  We see that there's a subscript of 2 after the N, meaning there are two moles of N for every mol of N2O.  You can think of it in terms of food -- for every 1 sandwich, there are two pieces of bread.

So let's multiply the number of moles of N2O by 2, to get moles of N!

.00389 mol N2O * ( 2 mol N / 1 mol N2O) = .00778 mol N!

Hope that helps :)

C) Methane reacts with chlorine in the presence of sunlight is example of substitution reaction.

Therefore, Methane reacts with chlorine in the presence of sunlight is example of substitution reaction.

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Explanation:

physical separation technique are based on physical properties of the substance

Answer:

Physical properties

Explanation:

Mixtures can be physically separated by using methods that use differences PHYSICAL PROPERTIES(boiling point, melting point, solubility in a given solvent,etc) to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.

The number of atoms per square centimeter in silicon

in the (100) = [tex]6.78[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

in the (110) = [tex]9.59[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

in the (111)  = [tex]7.83[/tex] × [tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

With the symbol Si and atomic number 14, silicon is a chemical element. It is a tetravalent metalloid and semiconductor that is crystalline, rigid, and brittle with a blue-gray metallic sheen. With carbon above it and germanium, tin, lead, and flerovium below it on the periodic table, it belongs to group 14. It rarely reacts, if at all.

Jöns Jakob Berzelius was able to prepare and characterize it for the first time in 1823, but this was delayed due to its high chemical affinity for oxygen. Silicates are a class of anions made up of its oxides. The only metalloid and nonmetal with melting and boiling points higher than its respective values of 1414 °C and 3265 °C is boron.

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Answer:

Explanation:de

The intermolecular attraction force that acts between two adjacent parts of a substance, especially a solid or liquid, is known as cohesion. A piece of substance is held together by this force.

Surface tension is the propensity for liquid surfaces that are at rest to condense into the smallest surface area. Razor blades and insects, which have a density greater than that of water, can float on the surface of the water without even becoming partially buried because to surface tension.

How are cohesion and surface tension related?

The phenomenon known as surface tension is caused by the cohesive forces between liquid molecules.

The ability of a water surface to withstand breaking is referred to as surface tension when discussing a compound like water.

In a liquid, molecules will be drawn to one another. Cohesion is the molecular attraction of similar molecules, whereas adhesion is the molecular attraction of dissimilar molecules.

Cohesion is most closely connected to surface tension. For instance, water molecules are drawn to one another, which causes the surface tension of a pool of water.

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Concentrated hcl has a specific gravity of 1.185 and is 36.5% w/w in hcl so 88 ml concentrated solution and in that add water

Here given data is concentrated hcl has a specific gravity of 1.185 and is 36.5% w/w in hcl and 88 ml concentrated solution  1.0 l of 0.050 m hcl would be prepared from the concentrated reagent because to make total 1 litre so we have to make total volume in that flask so to make total volume we have to take 88 ml of concentrated solution and add water to make a total of 1 litre to make 1.0 litre hcl add 88ml hcl concentrated solution and add water to make volume.

So, 1.0 l of 0.050 m hcl would be prepared from the concentrated reagent we have add water on it

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When solid chromium(III) oxide reacts with liquid aluminium to give liquid chromium and liquid aluminium oxide at high temperature, the balanced chemical equation of the reaction including the states of matter can be written as :

                    Cr₂O₃(s) + 2Al(l)    →   2Cr(l) + Al₂O₃(l)

This reaction occurs at high temperature because the reactivity is increased under this condition.The liquid aluminium is oxidized to form liquid aluminum oxide and the solid chromium(III) oxide is reduced to form liquid chromium.

Chromium(III) oxide is amphoteric in nature and insoluble in water. If it is reacted with aluminium, it gets reduced to the chromium metal. It is a type of simple replacement reaction as Chromium metal is replaced by the aluminium. It is an example of displacement reaction.

Correct question is -

The following reaction takes place at high temperatures. solid chromium(III) oxide reacts with liquid aluminum to give liquid chromium and liquid aluminum oxide. Write the balanced chemical equation (includes the states of matter).

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Answer:

2NaHCO3---> Na2CO3+H2O+CO2

Explanation:

*Note, I'm assuming you forgot to add the H2O in your question, because the equation couldn't exist without it