A chemist determined by measurements that 0.0750 moles of magnesium participated in a chemical reaction. calculate the mass of magnesium that participated in the chemical reaction.

Answer:

Pairs of liquids that will mix in all proportions are called a.) miscible liquids. An unsaturated solution has solute less than the maximum.

Explanation:

i hope this helps . MISCIBLE LIQUIDS

Pairs of liquids that will mix in all proportions are called miscible liquids.

Liquid is that state of matter which show consistency in flowing, having constant volume but do not have viscous nature.

Those liquids which are pepared by the mixing of other liquids in all proportions equally are called miscible liquids. And if they are not mix in all proportion properly then known as immiscible liquids.

Hence correct answer is miscible liquid.

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Explanation:

I hope it's helpful for you

1 mole of H₂O has more molecules than other compounds. The correct option is A.

A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.

The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a specific substance are present in an object or sample is determined by its quantity.

The tiniest component of any substance is capable of existing independently while maintaining its chemical and physical properties and is composed of one or more elements.

Out of these molecules, water has more molecules than  1 mole Al(OH)₃ and 1 mole NaCl. They don't have the same number of moles.

Therefore, the correct option is A. 1 mole H₂O.

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Answer:

b

Explanation:

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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Answer:

Formula Weight of gas sample = 20.1 g/mole => Neon (Ne)

Explanation:

Use Ideal Gas Law formula to determine formula weight and compare to formula weights of answer choices.

PV = nRT = (mass/fwt)RT => fwt = (mass/Volume)RT = Density x R x T

Density = 0.900 grams/L

R = 0.08206 L·atm/mole·K

T = 0.00°C = 273Kfwt = (0.900g/L)(0.08206L·atm/mole·K )(273K)

= 20.1 g/mol => Neon (Ne)

Answer:

Young's double slit experiment is the classic proof of the wave nature of light. In the experiment light from two sources interfere. Particles are thought to be unable to interfere, but wave interference is well established by observation.

The photoelectric effect is the experiment that challenged the prevailing view that light was a wave (established by Young as above). There are several bits of detail to the experiment that confirm that light exhibits particle behaviour. The main thing to appreciate is that the threshold frequency and instantaneous emission of electrons support a discrete nature to light.

Answer:

The area is important for climate science research because they can look at the glaciers and see over the years what is happening with them, are they multiplying or are they decreasing and if so at what rate.

Answer:

Melting glaciers are causing sea levels to rise. It’s important to study natural conditions in the Northern Patagonian Ice Field because the landscape there is dynamic and the effects of climate change can easily be seen. The retreat of the Nef Glacier and the disappearance of icebergs on the lake are evidence of rising temperatures and climate change.

Explanation:

Answer:

b

Explanation:

In an ecosystem, the  ozone depleting substance  is chlorofluorocarbon or the CFC's.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems.

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Answer:

114

Explanation:

plz make me brainiest

The correct option is C)A13+, The species that cannot act as a Lewis base is A13+ .

A Lewis base is a species that donates an electron pair during a chemical reaction. To determine if a species can act as a Lewis base, we look for the presence of lone pairs of electrons. H2S, S2, SH, and H2O all have lone pairs of electrons and can act as Lewis bases by donating these electron pairs. However, Al3+ is a cation and does not possess any lone pairs of electrons. Therefore, Al3+ cannot act as a Lewis base.

A Lewis base is a molecule or ion that can donate a pair of electrons. In order to donate a pair of electrons, the molecule or ion must have a lone pair of electrons. Al3+ does not have any lone pairs of electrons, so it cannot act as a Lewis base.

Here is a table of the Lewis basicity of the other answer choices:

Species Lone pairs of electrons   Lewis basicity

H2S                       2                         Strong

S2                       2                                Strong

SH-                        1                          Weak

H2O        2                                 Strong

The species that cannot act as a Lewis base is Al3+. This is because Al3+ does not have any lone pairs of electrons. The other answer choices have one or more lone pairs of electrons, so they can act as Lewis bases.

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Answer:

The answer is C. Plasma

The amount of KNO₃ would dissolve in 100g of water at 50 degrees celcuis to make a saturated solution is 44 g.

To create a saturated solution of KNO₃ in 100g of water at 50 degrees Celsius, the following steps should be taken:

Step 1: Find out the mass of the solvent in the saturated solution.

The solvent is water in this instance. So, using the formula for the mass of a solution, we can calculate the mass of the solvent in the saturated solution as follows:

Mass of solvent = Mass of solution - Mass of solute

= 100 g - Mass of KNO₃

Step 2: Determine the amount of solute that would be dissolved in the solution to make it saturated.

The mass of KNO₃ that would dissolve in 100 g of water at 50°C to create a saturated solution is 56g/100g of water.

Step 3: Calculate the mass of KNO₃ that would dissolve in 100g of water to make a saturated solution.

Mass of KNO₃ = Solubility of KNO₃ × Mass of solvent

Mass of KNO₃ = 56 g/100 g × (100 g - Mass of KNO₃)

Now, let's solve for Mass of KNO₃;

56 = 56g(100-Mass of KNO₃)/100100 - Mass of KNO₃ = 100

Multiply both sides of the equation by 100 to obtain;

5600 - 100 Mass of KNO₃ = 100

Mass of KNO₃ = 5600/10100 - 56

= 44 g

Therefore, 44 g of KNO₃ would dissolve in 100g of water to make a saturated solution.

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Answer:

23

Explanation:

there are 23 pairs of chromosomes

46 individula chromosomes

but each parnet contribute one chromosome to each pair

Answer:

23 :)

Explanation:

Answer: D. If the reaction occurs in the gas phase

Explanation:

Answer:

D is correct via A P e x

Explanation:

Answer: Physical change : tearing of paper, fixing of wtaer

Chemical change:  rusting of iron ,  electrolysis of water​, Rancidification

Explanation:

Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.

Example:  tearing of paper, fixing of wtaer

Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.

Example: rusting of iron ,  electrolysis of water​, Rancidification

Answer:

Evaporation

Explanation:

Evaporation involves a liquid becoming a gas and sublimation is the change of a solid directly to a gas. Phase changes require either the addition of heat energy or subtraction of heat energy .

The type of reaction that occurs when an enolate attacks an aldehyde and the resulting product is subsequently protonated is an aldol condensation reaction.

An aldol condensation reaction is a type of organic reaction that involves the condensation of two molecules of an aldehyde or a ketone to form a larger molecule with a new carbon-carbon bond. The reaction typically proceeds through the formation of an enolate intermediate, which then attacks the carbonyl group of another aldehyde or ketone molecule. The resulting product is subsequently protonated to form a new carbon-carbon bond and an alcohol functional group.

Overall, an aldol condensation reaction can be represented by the following general equation:

RCH₂CHO + R'CHO → RCH₂CH(OH)R' + H₂O

where R and R' represent alkyl or aryl groups.

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Density of a liquid determines how it will layer (heaviest to lightest). If the liquid is least dense it will float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.

The two observations you would make about the atoms are

These observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.

Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.

So,

The two observations you would make about the atoms are

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Answer:

The energy contained in its molecules movement and vibration

Explanation:

See above

The best reagents to convert 1-hexyne into (e)-1,2-dibromo-1-hexene are 1 equiv. Br2 in CCl4, followed by NaOH to convert the mixture of (Z)- and (E)-isomers to the desired (E)-isomer.

This reaction is called the Vicinal Dibromination reaction. Option A: xs Br2 in CCl4 is a good choice of reagents, but it will give a mixture of (Z)- and (E)-isomers. Option B: 1 equiv. HBr will result in the formation of (Z)-1-bromo-1-hexene. Option C: ROOR is a radical initiator and will not result in the desired product.

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Chemical reactions that absorb energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.

Photosynthesis is a example where plants absorb heat energy from sunlight to convert carbon dioxide and water into glucose and oxygen.

In the case of an endothermic reaction, the reactants are at a lower energy level compared to the products.  In other words, the products are less stable than the reactants.

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Chemical reactions are the reactions that occur between the reactant to produce the product. When the system uses energy then it is an endothermic reaction.

Endothermic reactions are the types of chemical reactions that absorb the heat and energy from the surrounding system to split the reactant to form the product.

The energy level of the reactants is less than that of the products and is more stable. The reactants require more energy to break their bonds for product formation.

Therefore, the endothermic reaction uses energy.

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The equilibrium constant, Kp, for the reaction cannot be determined without knowing the equilibrium pressures of gases B and C in addition to the initial and equilibrium pressure of gas A.



To calculate the value of Kp, which is the equilibrium constant in terms of partial pressures, we need to use the given equilibrium pressures and the stoichiometric coefficients of the balanced equation.The equilibrium constant expression for the reaction is Kp = (P(B) * P(C)^2) / (P(A)^2), where P(A), P(B), and P(C) are the partial pressures of gases A, B, and C, respectively.

Given that the initial pressure of A is PA = 240 mmHg and the equilibrium pressure of A is PA = 55 mmHg, we can substitute these values into the Kp expression.Kp = (P(B) * P(C)^2) / (P(A)^2) = (55 * P(B) * P(C)^2) / (240^2)

To solve for Kp, we need additional information about the equilibrium pressures of B and C. Without that information, we cannot determine the exact value of Kp.

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Answer:

36 eggs

Explanation:

12 eggs in each carton

12 + 12 + 12 = 36 eggs

or 3 * 12 = 36 eggs

Hope this helps, have a nice day/night! :D

Answer:

0.320 g Cu.

Explanation:

Hello there!

In this case, case, according to the presented chemical reaction, it is possible to determine that the mole ratio of zinc to copper is 1:1 and therefore, we will have the same amount of atoms for the both of them. Moreover, since one mole of copper contains 6.022x10²³ atoms of this element, with a mass of 63.546 g (molar mass); it is possible for us to write up the following mathematical setup in order to calculate the produced grams of copper:

\(3.03x10^{21}atoms Zn*\frac{1atom Cu}{1atom Zn}*\frac{1molCu}{6.022x10^{23}atoms Cu}*\frac{63.546gCu}{1molCu} \\\)

Thus, the numerical result turns out to be:

0.320 g Cu

Best regards!

Answer:

(B) No papa

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Answer:

(D) No Papa

Explanation:

is this even chemistry pffttt

Answer:

C. bc I ssid

Explanation:

0+0+0+0+0+0=00

Answer:

10.25L

Explanation:

Doubling the temperature would double the volume while halving the number of moles would decrease the volume by half, so the changes produced by these two variables cancel each other out. Since pressure and volume are inversely proportional, doubling the pressure will cut the volume in half, reducing it from 20.5 to 10.25 L.