How many moles of argon are in 30.6L at 28K and 658 mmHg?

Answer:

i think it is molecules.

Explanation:

Answer:

temperature

Explanation:

it is not composed of atoms or molecules

In the context of chemistry, matter is anything that has mass and occupies space. Among the given options, temperature cannot be classified as matter as it does not have mass or volume but is a measure of the average kinetic energy of particles.

In the context of chemistry, matter refers to anything that has mass and occupies space. Among the given choices, air, fog, and oxygen molecule - they all have mass and occupy space, hence they can be classified as matter. On the other hand, temperature is not a form of matter. It is a measure of the average kinetic energy of the particles in a system and does not have mass or volume.

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Answer:

Im pretty sure it would be 23

Explanation:

If it divide asexually it would be identical

Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles.

Explanation:

In water the following process undergoes to show water's ability to dissolve substances.

Dissociation is the process in which an ionic compound breaks into  cations and anions

Hydration is the process in which water surrounds the broken cations and anions.

In Dissolving process elements in water breaks down and surrounds respective individual molecules or particles.

Water readily dissociates ionic compounds, dissolves covalent molecules, and hydrates the smaller particles. This is most likely because of the strong attractive forces between water and solute particles as water is a polar molecule.

Answer: 52.39%

Explanation:

Just did on edg.

The percent by mass of carbon dioxide in sodium bicarbonate is 52.38%.

Percentage by mass is a way of representation of concentration of an element in a compound  or that of component of a mixture. It is calculated as mass of component divided by total mass of the mixture and then multiplied by 100.  

In this example, mass of carbon dioxide=44 gram and that of sodium bicarbonate is 84 grams

To find the percent mass of carbon dioxide  mass of carbon dioxide is divided by mass of sodium bicarbonate which is then multiplied by 100. That is, 44/84×100=52.38%.

In this method , the concentration is expressed in terms of mass percent.It describes the component in a particular mixture. It represents mass of solute present in given mass of solution.

It is expressed in mass or in moles and is referred to as percent by weight .

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Final answer:

The question asks to balance the chemical equation for the reaction of C2H6O with O2 to produce CO2 and H2O. The balanced equation is 2C2H6O + 7O2 → 4CO2 + 6H2O.

Explanation:

The question is about balancing the chemical equation C2H6O + O2 = CO2 + H2O, which involves finding the correct coefficients to ensure that the number of atoms for each element is the same on both sides of the equation.

To correctly balance the equation, we start by balancing the carbons (C) and hydrogens (H), then adjust the oxygens (O2). After determining that adjusting with simple integers leads to an imbalance due to an odd number of oxygen atoms, the equation is scaled up to balance all elements with integer coefficients.

The balanced equation is: 2C2H6O + 7O2 → 4CO2 + 6H2O.

Living things  are  interdependent with each other  and the  environment.

Explanation:

Living things to grow, thrive, survive and reproduce are interdependent on each other and their surrounding environment. They depend on each other and the environment for basic requirements which support life like water, air, food etc.

The food cycle starting with the producers, consumers, decomposers and their interdependence with each other for energy production is a clear example for this.  They are dependent on each other for reproduction and growth. They are dependent on the environment for living in their habitat and for raw materials for producing food.

Answer:

The answer to your question is 0.6 M

Explanation:

Data

Molarity = ?

Volume = 450 ml

mass of NaCl = 15 g

Process

1.- Calculate the molar mass of NaCl

NaCl = 23 + 35.5 = 58.5 g

2.- Calculate the number of moles of NaCl

             58.5 g of NaCl ------------ 1mol

                 15 g of NaCl ------------   x

                         x = (15 x 1)/58.5

                         x = 0.26 moles

3.- Calculate the molarity

Molarity = moles/volume

-Substitutiion

Molarity = 0.26/0.45l

-Result

Molarity = 0.6 M

The molarity of a 450 mL solution containing 15g NaCl is calculated by converting the mass of NaCl to moles, converting the volume of the solution to liters, and applying the molarity formula. The molarity is thus found to be approximately 0.57 M.

To determine the molarity of the solution, we will need to apply the formula for molarity which is the number of moles of solute per liter of solution. Let's follow these steps:

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5.33 Liters is the volume of 15.2 grams of SO2 at STP.

Explanation:

If the mass of the gas, then you can divide the mass by the molecular weight of the gas molecules to get the number of moles. Then multiply this by 22.4 Liters / mole to get the volume.

PV = nRT => The Ideal Gas Law.

Each unit occurs three times and the cube root yields L-atm / mol-K, the correct units for R when used in a gas law context.

PV / nT = R. or  PV = nRT.

R is called the gas constant.

PV = nRT => V = nRT/P

n = moles SO₂ = 15.2g/64g·mol⁻¹ = 0.238 mole

R = Gas Constant = 0.08206 L·atm/mol·K

T = Kelvin Temp = 273K at STP

P = pressure in atmospheres = 1.0 atm at STP

∴ V = (0.238mol)(0.08206 L·atm/mol·K)(273K)/(1.0atm)

=> 5.33 Liters SO₂.

The Stock System is used for naming ionic compounds with multiple oxidation states, different suffixes are used for polyatomic ionic compounds, the Greek Prefix System is used for binary covalent compounds, the prefix hydro- and the suffix-ic are used for binary acids, and binary ionic compounds are named after the two ions involved and use the suffix -ide.

1. Stock System: This is a method used to name ionic compounds with multiple oxidation states (d). For example, Iron (II) Chloride and Iron (III) Chloride.

2. Uses several different suffixes, depending on the types of ions involved: This points to a polyatomic ionic compound (c) which uses many suffixes such as -ate, -ite.

3. Greek Prefix System: This system is applied predominantly to name binary covalent compounds (a). For example, CO is called Carbon monoxide.

4. Contains the prefix hydro- and the suffix- ic: This rule is used to name binary acids (f). For instance, HCl in aqueous solution is called Hydrochloric acid.

5. Named after the two ions involved and uses the suffix -ide: This rule corresponds to the naming of binary ionic compounds (b). An example is NaCl, named Sodium Chloride.

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Answer:

An intermediate phenotype between the homozygous genotypes parents.

Explanation:

Dominance in genetics, refers to the phenomenon in which one variant (allele) of a gene on a chromosome masks or overrides the effect of the other variant of the same gene on the other copy of the chromosome.

Different kinds of dominance include; complete dominance, incomplete dominance, and co-dominance.

Incomplete dominance occurs when the phenotype of the heterozygous genotype appears different from the phenotypes of the homozygous genotypes and it is often intermediate.

For example, when a cross between an RR with an rr yields an Rr, we have an incomplete dominance.

Answer:

Yes, this hypothesis is true. The ancestor of whale belongs to amphibians.

Explanation:

Amphibians are those organisms which has the ability to live both on land and water. Wales are evolved from land animals such as ungulates. Ungulates are those organisms which belongs to mammals and having hooves. For example, deer, cow, horse and zebra etc. The ancestor of whale lives on land 50 million years ago. So the hypothesis is true.

Answer:had four legs of equal length

Explanation:

Answer:

60 J

Explanation:

The law of conservation of energy states that energy is neither created nor destroyed, just converted into different forms. This means the total mechanical energy of the object at point A will be the same as the total mechanical energy at point B, and the question tells us the total of that mechanical energy is 150 J. Note we are assuming no energy is lost from the system as heat.

At point B, if the potential energy is 90 J, the remainder of the 150 J total must be kinetic energy. KE = 150 J - 90 J = 60 J.

The kinetic energy of the object at point B is 60 J. This is calculated by subtracting the potential energy at point B from the total mechanical energy, because total mechanical energy, the sum of kinetic and potential energy, remains conserved.

This question deals with the concept of mechanical energy, which in physics is the sum of kinetic energy and potential energy. In this case, the total mechanical energy of the object is given as 150 Joules. At point A, the kinetic energy is 30 J and the potential energy is 120 J, adding up to the total mechanical energy.

At point B, the potential energy is stated to be 90 J. Because the total mechanical energy is conserved (i.e. it does not change between point A and point B), we can subtract the potential energy at point B from the total mechanical energy to find the kinetic energy at point B.

So, the kinetic energy at point B can be calculated using the equation: Kinetic energy = Total mechanical energy - Potential energy = 150 J - 90 J = 60 J.

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Answer:

The answer is c

Ionic bonding typically occurs between a metal that loses electrons (such as sodium) and a nonmetal that gains electrons (like chlorine), forming a compound such as sodium chloride.

Ionic bonding often occurs between a metal and a nonmetal because of their tendencies to lose and gain electrons, respectively. Metals tend to lose electrons and become positively charged ions, while nonmetals tend to gain electrons and become negatively charged ions. An example of such an ionic bond is the bond between sodium (Na), a metal that easily loses one electron to form Na⁺, and chlorine (Cl), a nonmetal that readily gains an electron to form Cl⁻.

The resulting compound, sodium chloride (NaCl), or table salt, is a classic example of ionic bonding; it is held together by the electrostatic attraction between the positively charged sodium and the negatively charged chloride ions.

This bonding forms a crystalline lattice that is neutral overall but consists of ions with opposite charges that are strongly attracted to each other.

Answer:

Wind is caused by differences of pressure in the Earth's atmosphere. Air from a high pressure area will move towards an area of low pressure. High winds are caused when air moves between areas with large differences in air pressure.

Explanation:

Wind is the movement of air. When the sun heats one part of the atmosphere differently than another, wind forms. This causes warmer air to expand, resulting in less pressure where it is warmer than where it is cooler.

Wind is the movement of air caused by the sun's uneven heating of the Earth and the rotation of the Earth itself. Winds range from gentle breezes to natural disasters like hurricanes and tornadoes.

Air will move from a high pressure area to a low pressure area. High winds occur when air moves between areas with significant differences in air pressure.

Wind is the movement of air from a high pressure area to a low pressure area.

Thus, Wind is caused by pressure differences in the Earth's atmosphere.

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Answer:

endergonic reaction.

Explanation:

an endergonic reaction requires energy to be driven.

Answer:

230.3 kJ

Some chemical reactions show release of heat while some show absorption of heat. On these bases, the reaction is classified as either endothermic or exothermic. Negative sign of ΔH means exothermic reaction.

Final answer:

For 2.25 mol of H₂O₂, the total energy released is approximately -0.509175 kilojoules per Kelvin, based on the enthalpy change of -226.3 J/K per mole of H₂O₂.

Explanation:

The student has asked, "How many kilojoules are released when 2.25 mol of H₂O₂ reacts?" To answer this question, we need to look at the thermochemical equation given for the decomposition of hydrogen peroxide (H₂O₂) and calculate the enthalpy change for the given amount of moles.

Using the information provided, we know that -226.3 J/K is released per mole of H₂O₂. To find out the total amount of energy released for 2.25 mol, we perform the following calculation:

Energy released = -226.3 J/K × 2.25 mol = -509.175 J/K = -0.509175 kJ/K (since 1 kJ = 1000 J)

Thus, when 2.25 mol of H₂O₂ react, approximately -0.509175 kilojoules per Kelvin are released.

Answer:the temperature of the gas

Explanation:

The genotypes of each square for the freckles trait are A: dominant,  B: recessive, C: dominant and D: recessive.

The Punnett square is a diagram used in genetics to determine the allele and phenotypic proportions in the offspring.

In conclusion, the genotypes of each square for the freckles trait are A: dominant,  B: recessive, C: dominant and D: recessive.

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Answer:

14.65 mL

Explanation:

First figure out the formula which will be...

V2 = P1V1T2/P2T1

Next, put our numbers into the formula. We should get...

V2 = 710 x 14.8 x 293 / 284 x 740

Do the math and you should get 14.65 mL

- Hope this helps! If you need a more in-depth explanation let me know. Once you learn the basics it will become easy.

To solve this problem, we use the combined gas law and re-arrange it to solve for the final volume (V2). After substituting the given values and performing the calculation, the new volume of the gas at 20.0°C and 740 mm Hg is found to be approximately 14.00 mL.

The subject of this problem is applying the combined gas law, which states that the ratio of the product of pressure and volume to temperature remains constant: P1V1 / T1 = P2V2 / T2. Let's convert all the temperatures to Kelvin (absolute temperature) first: T1 = 11.0 °C + 273.15 = 284.15 K and T2 = 20.0 °C + 273.15 = 293.15 K. The pressures are already in the same units (mm Hg), so we don't need to convert those.

We can re-arrange the formula to solve for V2: V2 = (P1V1T2) / (T1P2).

Substituting the values into the formula gives V2 = (710 mm Hg * 14.8 mL * 293.15 K) / (284.15 K * 740 mm Hg). After calculation, V2 comes out to be approximately 13.9933 mL, which can be rounded to 14.00 mL for the sake of significant figures.

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Answer: The number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

Explanation : Given,

Mass of [tex]O_2[/tex] = 14.9 g

Molar mass of [tex]O_2[/tex] = 32 g/mol

First we have to calculate the moles of [tex]O_2[/tex]

[tex]\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}[/tex]

[tex]\text{Moles of }O_2=\frac{14.9g}{32g/mol}=0.466mol[/tex]

Now we have to calculate the moles of [tex]CO_2[/tex]

The balanced chemical equation is:

[tex]2C_4H_{10}+13O_2\rightarrow 10H_2O+8CO_2[/tex]

From the reaction, we conclude that

As, 13 mole of [tex]O_2[/tex] react to give 8 moles of [tex]CO_2[/tex]

So, 0.466 mole of [tex]O_2[/tex] react to give [tex]\frac{8}{13}\times 0.466=0.287[/tex] mole of [tex]CO_2[/tex]

Therefore, the number of moles of [tex]CO_2[/tex] produced are, 0.287 moles.

The polarity of a molecule like O3 or NH3 is determined by its molecular geometry and the electronegativity of its atoms. O3 with its bent shape has a molecular dipole, and NH3 has a molecular dipole pointing from H towards the more electronegative N.

Predicting the polarity of molecules involves understanding their molecular geometry, electronegativity of atoms, and bond dipoles. For O3 (ozone), the molecule has a bent geometry, resulting in an overall molecular dipole due to the uneven distribution of electron density. The bond dipoles do not cancel each other out because of this bent structure.

In NH3, the nitrogen atom is more electronegative than the hydrogen atoms, resulting in bond dipoles pointing towards nitrogen. The geometry of NH3 is trigonal pyramidal, which means the bond dipoles do not cancel, and there is an overall molecular dipole pointing away from the hydrogens and towards the nitrogen.

By using the molecule polarity simulation, one can visualize these molecular structures and confirm the direction of dipoles. Remember to always draw the Lewis structure and use VSEPR theory to determine the molecule's geometry before predicting its polarity.

Answer:

5 moles

Explanation:

CaO+H20--> Ca(OH)2

mass 280 90 370g

RFM 56 18 74

moles 5 5 5

Final answer:

To produce 370g of calcium hydroxide, 4.99 moles of CaO are required, based on the molar mass of Ca(OH)2 (74.1 g/mol) and the stoichiometry of the reaction CaO + H2O → Ca(OH)2.

Explanation:

To determine how many moles of CaO are needed to react with excess water to produce 370g of calcium hydroxide (Ca(OH)2), we will use the molar mass of Ca(OH)2 and a balanced chemical equation. First, let's calculate the moles of calcium hydroxide:
Molar mass of Ca(OH)2 = 74.1 g/mol
Mass of Ca(OH)2 = 370 g

Using the formula moles = mass ÷ molar mass, we find:

Moles of Ca(OH)2 = 370 g ÷ 74.1 g/mol = 4.99 mol

Now, looking at the balanced chemical equation for the reaction of calcium oxide with water:

CaO + H2O → Ca(OH)2

According to the equation, 1 mole of CaO reacts to produce 1 mole of Ca(OH)2. Therefore, 4.99 moles of CaO are needed to produce 370 g (which is equivalent to 4.99 moles) of calcium hydroxide.

Answer : The hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]

Explanation :

As we know that:

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Mathematically,

[tex]pH=-\log [H^+][/tex]

Similarly,

pOH : It is defined as the negative logarithm of hydroxide ion concentration.

Mathematically,

[tex]pOH=-\log [OH^-][/tex]

Given:

pOH = 6.42

[tex]6.42=-\log [OH^-][/tex]

[tex][OH^-]=3.8\times 10^{-7}M[/tex]

Therefore, the hydroxide ion concentration of a solution is, [tex]3.8\times 10^{-7}M[/tex]

Answer:

d

Explanation:

a) This is not an equation.

b) This is not an equation.

c) The reactant side has 1 Na and 2 O while the product side has 2 Na and 2 O, therefore it is not balanced

d) The reactant side has 4 H and 4 O and the product side has 4 H and 4 O, therefore it is balanced.

Final answer:

Interspecific competition happens when two species compete for the same limited resources, such as chipmunks and squirrels competing for sunflower seeds, with one species typically having a competitive advantage over the other.

Explanation:

Interspecific Competition

Competition between two species occurs when they are both striving for limited resources in the same area. An example of such competition might occur when chipmunks and squirrels compete for sunflower seeds in a garden. This is known as interspecific competition, which involves individuals of different species. In this competition, one of the species will typically be better adapted to the environment and will therefore have a competitive advantage over the other, resulting in greater reproductive success and survival. For instance, if squirrels are more effective at gathering sunflower seeds than chipmunks, the squirrels might have a higher survival rate, impacting the chipmunk population negatively.

In contrast, intraspecific competition occurs when members of the same species compete against each other for resources, such as two male deer clashing antlers to compete for mates. Both forms of competition are crucial factors in natural selection and can lead to the evolution of species-specific adaptations, also referred to as character displacement.

Answer:

B. Algae can grow in extreme conditions and provide food for many different organisms.

Explanation:

pioneer species are harden species that are first to colonize a barren environment or previously existing ecosystem that has been disrupted by earth natural phenomenon like volcanism etc.

Pioneer species are the first to colonize an ecosystem that has been previously damaged or disturbed because of there ability to grow in extreme condition. Example is the colonization of an environment that has been formed from lava flow .  This species can withstand a disturbed or damaged habitat. Examples of pioneer species are lichen, Algae etc.

The pioneer species are photosynthetic as the new habitat will have limited nutrient and largely expose to light energy to hasten photosynthesis. This organism when they die will provide  the organic material for further higher level of colonization.  Further more the mode of reproduction is usually asexual for most of these organisms.

Answer:

i think its a

Explanation:

Answer:

You can dissolve about 1g of chloroform in a 100g of water; slightly less if the water is hot. This would not generally be considered 'soluble', but it's not entirely negligible either, depending on your purposes. chloroform is insoluble in water since it does not have any hydrophillic groups.

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