What element forms an ion with a 2 charge that has an electronic configuration of 1222263236 (or [ar])

In plants, the Calvin cycle and gluconeogenesis enzymes are most active under solution conditions with high pH and high [Mg2+]. So the correct option is d) high pH, high [Mg2+].

The optimal pH for the Calvin cycle enzymes in plants is generally slightly alkaline, ranging from pH 7.5 to 8.5, which is typically found in the stroma of chloroplasts. . Magnesium ions are required for the binding of substrates and stabilization of enzyme-substrate complexes in the Calvin cycle. Therefore, high pH and high concentrations of magnesium ions (Mg2+) would be favorable for the activity of Calvin cycle enzymes in plants. It's worth mentioning that the term "gluconeogenesis" is not typically used in the context of plants, as plants primarily undergo photosynthesis to synthesize glucose from carbon dioxide and water,

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Helium noble gas electron structures do the atoms in a molecule of hydrogen chloride attain

Noble gas any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates

The reason that the two chlorine atoms stick together is that the shared pair of electrons is attracted to the nucleus of both chlorine atoms and hydrogen atoms only need two electrons in their outer level to reach the noble gas structure of helium

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Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

Answer: o.8/11.o

Explanation:

The carrying capacity is the maximum number of individuals of a species that an environment can support. Population size decreases above carrying capacity due to a range of factors depending on the species concerned, but can include insufficient space, food supply, or sunlight.

Ionization energy is the energy required to remove all the outermost electrons from the atom or ion in the gaseous state.

Ionization energy, also known as ionization potential, is the amount of energy required to remove an electron from an atom or molecule in the gas state. It is typically expressed in units of electron volts (eV). As the ionization energy increases, the atom becomes more stable and harder to remove an electron from. The ionization energy also depends on the type of atom in question as well as the electronic configuration. Generally, elements with higher atomic numbers have a greater ionization energy. This is because the extra electrons are held more tightly, making them harder to remove. Additionally, elements in the same group tend to have similar ionization energies.

This energy is usually measured in kilojoules per mole (kJ/mol) and is the energy required to break the bonds between the electrons and the nucleus. The higher the ionization energy, the more tightly the electrons are bound to the nucleus. Ionization energy is also known as ionization potential.

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Answer:

The correct answer is - tin.

Explanation:

Tin is the element that is mixed with copper to make bronze as bronze has many unique properties such as crisp sound quality and hardness. The hardness of the bronze allows them to make a good quality sound is come by adding tin to copper restricts the free flow of electrons of the copper atoms.

The pure metals have molecules present in an orderly manner and allow the electrons to free flow. This is why bell makers use bronze as it does not allow electrons to move freely which makes it hard and makes a good sound.

Answer:

d. 671.6 nm

Explanation:

It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:

λ = c / f

Where λ is wavelength,

c is speed of light, a constant (2.998x10⁸m/s)

And f is frequency: 4.464x10¹⁴s⁻¹

Replacing:

λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹

λ = 6.716x10⁻⁷m

As 1m = 1x10⁹nm:

6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm

Right answer is:

Explanation:

Entropy refers to the degree of disorderliness of system. Basically it refers to how random a system is.

Gong through the options.

A. The phase change is from solid to liquid. Liquid has a greater degree of disorderliness compared to solid hence entropy is increasing.

B. The phase change is from solid to gas. Gas particles has a greater degree of disorderliness compared to solid hence entropy is increasing.

C. The phase change is from aqueous to liquid. Aqueous solutions has a greater degree of disorderliness compared to liquid hence entropy is decreasing.

D. The reactant side has; solid + gas. In the product side, there is only gas. The product side has a greater degree of disorderliness hence the entropy is increasing.

E. The entropy of the product is greater than the entropy of the reactants hence entropy is increasing.

F.  The phase change is from aqueous to solid. Aqueous solutions has a greater degree of disorderliness compared to solid hence entropy is decreasing.

Answer:

90 mL

0.09 Liters

Explanation:

Givens

1 cc of solution = 1 mL

0.75 cc / min needed to go in intravenously.

2 hours needed.

? Liters

Solution

1 hour = 60 minutes

1 hours = 2 * 60 = 120 minutes

rate = 0.75 cc/minute

Liters = rate * time

Liters = 0.75 cc * 120 minutes

Liters = 90 cc

That's not the answer.

1 Liter has 1000 mL or ccs

x Liter has 90 mL          

Equation

1/x = 1000 / 90

Solution

Cross multiply

1000x = 90*1           Divide by 1000

x = 90/1000

x = 0.09 Liters.

To solve this question we will assume that the moles of gas do not change and that the gas behaves like an ideal gas.

For an ideal gas we have that its behavior will be according to the following equation:

Where,

P is the pressure of the gas, in atm

V is the volume of the gas, in liters

n are the moles of the gas

T is the temperature of the gas, in Kelvin

R is a constant, 0.08206 atm.L/mol.K

We have for this gas two states, an initial state (1) and a final state (2), so for each state we can apply the ideal gas law, we will have:

Initial state:

Final state:

Since nR are constants, we can equate both equations:

For each state the conditions of pressure, volume and temperature will be:

P1=1.00atm

V1=195mL = 0.195L

T1=20°c = 293.15K

P2= 600mmHg=0.79atm

T2=60°C=333.15K

V2=Unknown

We clear V2 and replace the known data:

Answer: The final volume of the gas will be 280mL

In this question, we have to choose two neutral atoms that will present the same number of valence shell electrons, in order to do that, we can look for these elements in the periodic table, the elements that are in the same group will have the same number of electrons in the valence shell, this is the case of Sulfur and Selenium, both are in group 6 and present 6 electrons in the valence shell

Answer:

they all look like they are

Explanation:

Answer:

Only A and B are redox

Explanation:

Redox reactions are ones where elements change their oxidation states. That means any reactions that involve free elements that are also in compounds, ex: Na in a) is in both 2Na and 2NaCl are redox because their oxidation states change from 0 to whatever in the compound. This means A and B are redox reactions.

For C, (CO3) has a charge of -2, and reactants have charges C = +4, O = -2, and H = +1

The product compounds are all zero charge, so charges C = +4 and O = -2 makes CO2 charge 0 and H = +1 and O = -2 also gives H2O a zero charge. Since al elements of reactants are products do not have a change in charge, it is not redox.

Note that Oxygen is almost always at a charge of -2, that should help you with  calculations.

Similarly in d), (NO3) has charge -1, with charge N = +5, O = -2, and Pb = +2.

K tends to have charge +1 and I -1.

For d) reactants, Pb = +2 and I = -1 still gives PbI2 a zero charge. KNO3 also leaves it a zero charge.

Therefore d) also does not have any charge change in elements so it is not redox

Answer/Explanation:

A higher temperature causes the molecules in a substance to move faster in a chemical change. This increased speed allows the particles to have enough force for a chemical change and it also increases the amount of times a particle hits another this makes it faster for it to combine.

Answer:

Rb: [Kr] 5S¹

Explanation:

Rubidium is the chemical element with the symbol Rb and atomic number 37.

Answer:

1 mole of Na = mass of 22.99 g, 1 mole of Si = mass of 28.09 g.

The solubility of 20.0 g salt dissolved in 25.0 g of water at a certain temperature, in which 80% of the salt dissolves to give a saturated solution is 64%.

20.0g of salt was dissolved in 25.0g of water at a certain temperature and 80% of the salt dissolves to give a saturated solution. To determine the solubility of the salt in 100g of water, the following formula is used:

Solubility = (mass of solute/mass of solvent) x 100

Since 80% of the salt dissolves to give a saturated solution, let's assume that the remaining 20% is undissolved. Therefore, the mass of the solute that dissolves is:

Mass of solute = 80% x 20.0g = 16.0g

Mass of solvent = 25.0g

Using the formula above:

Solubility = (16.0g/25.0g) x 100 = 64%

Therefore, the solubility of the salt in 100g of water is 64%.

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The data can show us that X ,Y and Z are all esters

The law of definite proportions, also known as Proust's Law, states that a given chemical compound always contains the same elements in the same proportion by mass.

This means that no matter how a compound is obtained or prepared, its elemental composition will always be the same. For example, water is always composed of hydrogen and oxygen in a ratio of 2:1, regardless of its source or method of preparation.

The law of definite proportions is a fundamental principle of chemistry and provides evidence for the atomic theory of matter.

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Answer:

bussy

-/////////////-

Explanation:

Answer: its asking for what gases make up that planet

Explanation:

for example: jupiter is made up of 90% hydrogen ~10% helium and <1% hydrogen.

Answer:

See answer below

Explanation:

As you are asking for chemical formula and ionic equation, then, I will assume that after the station #3 below, are the solutions you are requiring.

You are also not specifing if you want for example, result of solution 1 + solution 3. If you need that, please post that on another question.

Now for the chemical formula, you need to identify the elements in all 3 solutions, and also the type of compound.

1. Solution 2 Potassium Iodide:

In this case we have Potassium on one side, and Iodine on the other side, the symbol for those are K and l. As Potassium have the +1 oxidation state, cause is the only one that it can have, when it's next to an halide like chlorine or bromine, it will form a binary salt. The halides, usually work with the lowest oxydation state. In the case of Iodide it will be -1, so, the formula will be:

KI

And the net ionic equation will be the chemical equation that shows how the charges and atoms are balanced. In this case it would be:  

K⁺ + I⁻ ------> KI

2. Solution 1 and 3, Lead (II) nitrate and Sodium carbonate:

In this case I will work with both, because both of the solution are tertiary compounds. In this cases, we have two tertiary salt, The Sodium symbol is Na, and is working with it oxydation state +1. Carbonate is an anion and have the formula CO₃ working with the oxydation state -2. Lead can work with oxidation state +2 and +4. It's symbol is Pb. Nitrate is NO₃ and works with oxydation state -1 instead.

The chemical formula and ionic equation for both will be:

Lead(II) nitrate: Pb(NO₃)₂

Sodium Carbonate: Na₂CO₃

And the net equations:

Lead nitrate: Pb²⁺ + 2NO₃⁻ ------> Pb(NO₃)₂

Copper sulfate: 2Na⁺ + CO₃²⁻ -------> Na₂CO₃

Hope this helps

To calculate the mass percent of the phenol in the solution, we first need to calculate the total mass of the solution.

The total mass of the solution can be calculated by multiplying the density of phenol (1.070 g/ml) by the volume of phenol (400.0 ml), and adding this to the mass of the water (1217.9 ml x 1.000 g/ml).

This gives us a total mass of the solution of 506.77 g.

To calculate the mass percent of the phenol in the solution, we need to divide the mass of phenol by the total mass of the solution and multiply this by 100.

The mass of phenol is 400.0 ml x 1.070 g/ml, which equals 427.8 g. The mass percent of the phenol is 427.8 g/506.77 g x 100 = 84.3%.

In conclusion, the mass percent of the phenol in the solution is 84.3%.

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The diagram is in the given picture. Ketones are more reactive towards the base than aldehydes.

On using a base,  the bottom abstracts a proton from alpha hydrogen to form a carbanion. Carbanion formed is stabilized because the negative charge formed participates in resonance with the carbonyl group.

What is the carbonyl group?

A  group consists of a double bond linking a carbonyl carbon atom and a carbonyl oxygen atom. The carbonyl oxygen atom shares two of its six valence electrons with the carbonyl atom. Its remaining four valence electrons remain as two sets of electron lone pairs.

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Answer:

Right if you think it is.

Answer:

X2Z3

Explanation:

Based on the clues, X is a metal and Z is a non-metal.

X could be aluminum and Z would need to be an element from the oxygen family.

Answer:

27.07 gm   nine days ago

Explanation:

17.5 = x (1/2)^9/14.3

x = 27.07 gm

Answer:

sidjnfjdueirb sidisjsiwijejdkdodif

The pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade.

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Answer:

Paleoclimatology

Step by Step explanation:

is the study of climate records from hundreds to millions of years ago. Information for paleoclimate studies come from natural records rather than instruments: these indirect records of climatic conditions are called proxy records. Coring a tree to gain access to tree ring data.

Answer: Fertilization defintion

Explanation:

the action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.

Or giving rise to new indivisual organisms or offspring and initiating development