Predict what the charge would be on each if an atom of that element were to gain or lose electrons to form an ion.

K K3+K2+K+K-K2-K3-

Se Se3+Se2+Se+Se-Se2-Se3-

Sr Sr3+Sr2+Sr+Sr-Sr2-Sr3-

Al Al3+Al2+Al+Al-Al2-Al3-

F F3+F2+F+F-F2-F3-

N N3+N2+N+N-N2-N3-

Answer:

False

Explanation:

It will occupy 271.7

Answer: equal to

Explanation:

Answer:

2.67g of NH4Cl are required

Explanation:

Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.

To prepare 100mL of a 0.50M are required:

100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl

As molar mass of NH4Cl is 53.491g/mol:

0.0500 moles * (53.491g / mol) =

Vitamin K plays a crucial role in the body as it is involved in blood clotting and bone metabolism.


- Blood clotting: Vitamin K helps in the production of proteins that are responsible for blood clotting. Without enough vitamin K, blood may not clot properly and can lead to excessive bleeding.
- Bone metabolism: Vitamin K helps in the activation of proteins that are important for bone health. It promotes the absorption of calcium, which is necessary for bone formation and strength.
- Carbohydrate production: Although not as well known, vitamin K also plays a role in carbohydrate production in the body.
- Fat disposal: Vitamin K has been shown to play a role in fat metabolism and disposal in the body.

Long Answer:
Vitamin K is a fat-soluble vitamin that is involved in various processes in the body. One of its main functions is in blood clotting. Vitamin K helps in the production of proteins that are important for blood clotting, such as prothrombin. Without enough vitamin K, blood may not clot properly and can lead to excessive bleeding.

In addition to its role in blood clotting, vitamin K is also important for bone metabolism. It helps in the activation of proteins that are important for bone health, such as osteocalcin. Osteocalcin is responsible for the absorption of calcium, which is necessary for bone formation and strength.

Although not as well known, vitamin K also plays a role in carbohydrate production in the body. It helps in the conversion of glucose into glycogen, which can be stored in the liver and muscles for energy.

Finally, vitamin K has been shown to play a role in fat metabolism and disposal in the body. It helps in the activation of proteins that are involved in fat metabolism, such as lipoprotein lipase. This protein is responsible for breaking down fats and using them for energy.

In conclusion, vitamin K plays a crucial role in the body, particularly in blood clotting and bone metabolism. It also plays a lesser-known role in carbohydrate production and fat metabolism.

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The formula of the above listed compounds are given below:

Aluminum hypophosphite: AlPO2

Lithium persulfate: Li2S2O8

Zinc thiocyanate: Zn(SCN)2 -

Aluminum hyposelenite: AlSe2O4

The name of the formula Se2O4 is selenium (iv) oxide

A compound can simply be defined as a substance which contains two or more elements which are chemically combined together.

So therefore, the name of the formula Se2O4 is selenium (iv) oxide

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The mass of carbon dioxide released during the reaction is 2.6 grams.

To determine the mass of carbon dioxide released during the reaction between sodium hydrogen carbonate (NaHCO3) and acetic acid (CH3COOH), we need to calculate the difference in mass before and after the reaction.

Before the reaction:

Mass of NaHCO3 = 3.8 g

Mass of acetic acid = 10.5 g

Total mass before the reaction = Mass of NaHCO3 + Mass of acetic acid = 3.8 g + 10.5 g = 14.3 g

After the reaction:

Mass of the contents of the reaction vessel = 11.7 g

To find the mass of carbon dioxide released, we calculate the difference in mass:

Mass of carbon dioxide released = Total mass before the reaction - Mass of the contents of the reaction vessel

= 14.3 g - 11.7 g

= 2.6 g

Therefore, the mass of carbon dioxide released during the reaction is 2.6 grams.

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Explanation:

whats the question. cause I didn't see it

Electronegativity is determined by factors like the nuclear charge

The carboxylic acid derived from an alkane with one carbon is called methanoic acid. Option A is correct.

Carboxylic acids are organic compounds containing a carboxyl group (-COOH) attached to a carbon atom. This functional group consists of a carbonyl group (C=O) and a hydroxyl group (-OH) attached to the same carbon atom. The general formula for carboxylic acids is R-COOH, where R is an alkyl or aryl group.

Carboxylic acids are commonly found in nature and have many important biological functions. They are essential building blocks for the synthesis of amino acids, which are the building blocks of proteins. Carboxylic acids are also involved in many metabolic pathways and are important in the metabolism of fats.

Carboxylic acids are used in many applications, including as preservatives in food and as intermediates in the synthesis of pharmaceuticals, polymers, and other organic compounds.

Hence, A. is the correct option.

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--The given question is incomplete, the complete question is

"Identify the name of the carboxylic acid derived from an alkane with one carbon. Select the correct answer below: A) methanoic acid B) monocarboxylic acid C) monoalkane acid D) ethanoic acid."--

The law of conservation of the mass is useful for the chemical changes as  if the substance undergoes the chemical change, the product will  have the same mass though it.

The law of conservation of the mass states that the mass is neither created nor be destroyed, it can be only  transformed. The mass of the product  formed  is exactly equal to the mass of the reactants. If the original substance will undergoes the chemical change, the product formed will  have the equal mass of the reactant though it can  be present  in the another form.

Thus, the law of the conservation of mass is related to the chemical change as the mass neither be created nor be destroyed.

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Answer:

When determining the age of a victim withing ages 15-22, dental remains provide comparison of the stage of tooth formation shown in X-rays and bone.

If 40. 0 g of HCl reacts with an excess of magnesium metal,  the theoretical yield of hydrogen is 2.218 g .

Hydrochloric acid (HCl) is a strong, highly corrosive acid that is commonly used in a variety of industrial and laboratory applications. It is a clear, colorless solution that has a pungent, irritating odor. HCl is highly soluble in water and forms an aqueous solution that has a pH of about 1.

The reaction between hydrochloric acid (HCl) and magnesium metal can be represented by the following equation:

HCl(aq) + Mg(s) -> MgCl2(aq) + H2(g)

The theoretical yield of hydrogen can be calculated by using the stoichiometry of the reaction. If 40.0 g of HCl reacts with an excess of magnesium metal, the number of moles of HCl can be calculated as:

n = mass / molar mass = 40.0 g / 36.5 g/mol = 1.097 mol

The stoichiometry of the reaction tells us that one mole of HCl will produce one mole of hydrogen gas. Therefore, the theoretical yield of hydrogen would be:

n = 1.097 mol * 1 mol/mol = 1.097 mol

The mass of 1.097 moles of hydrogen gas can be calculated as:

mass = n * molar mass = 1.097 mol * 2.016 g/mol = 2.218 g

Therefore, If 40. 0 g of HCl reacts with an excess of magnesium metal,  the theoretical yield of hydrogen is 2.218 g

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Answer:

Rabbit,Dolphin

Explanation:

There are more organism of 44 cromosomes.

*sorry I can't give a full explanation.*

g = 9.8 m/s²

w = m*g

Weight of cat: 55 N = m*9.8

m = 5.61 kg

Weight of dog: 110 N = m*9.8

m = 11.22 kg

There is gravitational potential energy (GPE) acting on the cat since it's at the very top.

GPE of cat = m*g*h = 5.61*9.8*2 = 109.96 J

GPE of dog = m*g*h = 11.22*9.8*0 = 0 J (it's 0 m height because it's on the floor instead of in the tree)

But, if the dog was also 2 m up in the tree, its GPE would be 219.91 J.

As you can see, it's GRAVITATIONAL potential energy is bigger than the cat because it weighs more. Generally, if you were just trying to find the force which is w = m*g (since weight is a force), you would see that the bigger the mass, the bigger the force, and gravity stays the same.

Hope this helped

Answer:

Left or up, either one of those

Explanation:

Answer:

isnt the answer RIGHT

Explanation:

The average atomic mass of copper is 63.55.

The correct option is B. 63. 55

Copper is a chemical element with the symbol Cu. This is a metal that is a ductile, malleable, and good conductor of electricity.

Now,

The two isotopes of copper are:

63Cu  with the isotopic mass 62.93

65Cu, with an isotopic mass of 34.93

63Cu has a 69.2% abundance.

65Cu has 30.8% abundance.

The average atomic mass of Cu will be

62.93×69.2% + 64.93×30.8% = 63.55 amu.

Thus, the average atomic mass of copper is 63.55.

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The service sector is dominant in Jessica's economy. The service sector refers to the portion of the economy that provides services rather than producing goods.

It includes various industries such as retail, healthcare, education, finance, hospitality, and more. Since the service sector is dominant in Jessica's economy, it means that a significant portion of the economic activity and employment is focused on providing services to consumers or other businesses. This indicates that the country relies heavily on service-based industries to drive economic growth and generate employment opportunities.

Given that Jessica lives in a sector economy, one of the most important occupations in her country would likely be related to the service sector. Occupations such as customer service representatives, healthcare professionals, educators, financial advisors, and hospitality workers could be crucial in driving the economy and meeting the needs of the population.

It is important to note that other sectors like the agricultural and industrial sectors may still exist in Jessica's country, but the dominance of the service sector suggests that it plays a central role in the economy.

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Answer:

Impure substances tend to have a slightly lower melting point than the pure substance.

Explanation:

Answer:

0.0411 kilometre

Explanation:

1 yard = 0.0009144

Answer:

0.0411 kilometre

hope it helps :)

The reactivity of the double bond is affected by the presence of substituents. Electron-withdrawing groups make it more reactive, while electron-donating groups make it less reactive.

The presence of the double bond causes some structural differences between alkanes and alkenes. Alkenes are not as dense as alkanes, and the double bond creates a dipole that can be exploited by other molecules.

Cycloalkenes are alkenes that have cyclic structures. The cyclic structure makes them more stable than the linear structure of alkanes. The cyclic structure also provides additional sites for substitution, which affects the reactivity.

Cycloalkenes have cyclic structures with a ring of carbons and a double bond.

The reactivity of the double bond is affected by the presence of substituents. Electron-withdrawing groups make it more reactive, while electron-donating groups make it less reactive.

The presence of the double bond causes some structural differences between alkanes and alkenes. Alkenes are not as dense as alkanes, and the double bond creates a dipole that can be exploited by other molecules.

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The incompressible assumption is valid for a flow when the Reynolds number is low (Re < 2300) for air and other gases. It is valid for water and other liquids when the Reynolds number is low (Re < 2000).

It is valid for glycerin and other oils when the Reynolds number is low (Re < 100).

Incompressible assumption

For a fluid flow to be considered incompressible, the change in density due to changes in pressure or temperature must be negligible. The fluid is considered to be incompressible if the density changes by less than 5% when the pressure or temperature is varied.

For air, the incompressible assumption is valid for flow velocities less than 2000 feet per minute (fpm) at 20 degrees Celsius. For other gases, the incompressible assumption is valid for velocities less than 100 fpm at the same temperature.

For water, the incompressible assumption is valid for flow velocities less than 3 feet per second (fps) at 20 degrees Celsius. For other liquids, the incompressible assumption is valid for velocities less than 1 fps at the same temperature.

For glycerin and other oils, the incompressible assumption is valid for flow velocities less than 0.2 fps at 20 degrees Celsius.

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Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.

Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.

The three main types of recrystallization are;

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Answer:

The available amounts of each reactant

Explanation:

The limiting reactant is the reactant that will limit the equation.

For example, I have 2N2 and H2O. In this situation, H2O would be the limiting reactant since there is only one atom, while N2 has two atoms.

Think of it like you're making peanut butter and jelly. You have 50 cans of peanut butter and only 10 jelly. Which means you can only make sandwiches using 10 jars of jelly and 10 jars of peanut butter.

Answer:C

Explanation:oxygen,light,and glucose combine to produce high energy molecules

Answer:

c

Explanation:

I got this answer right so trust me

Answer: Density, Volume, Shape

The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr)

What qualities do alkali metals possess?

The alkali metals (lithium, sodium, potassium, rubidium, and cesium) are soft, glossy metals with low melting points when they are in their purest forms. Alkali metals easily react with moisture and the atmosphere. Special care must be used when using and storing these metals due to their reactivity.

The alkali metals in group 1 are so-called because, when treated with water, their oxides and hydroxides produce alkali solutions.

One of the most reactive metals is the alkali metal. They have greater atomic radii and low ionisation energies, which contribute to this. They have an oxidation state of 1, and they frequently give electrons during reactions. These metals stand out for their supple texture and silvery hue.

Alkalis can aid in the softening of drinkable water and the eradication of contaminants including manganese, fluorides, and organic tannins. The National Lime Association claims that in order to absorb and neutralise sulphur oxides and help prevent acid rain, heavy enterprises use alkali in the form of lime.

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Elements that belong to alkali metal family  are Lithium(Li), Sodium(Na), Potassium (K), Rubidium (Ru), Cesium (Cs) and Francium (Fr) .

An element is a substance that can not be damaged down into a simpler layout. They may be distinguished by means of a completely unique atomic range. The elements are organized via their atomic variety in the periodic table, which highlights elements with similar residences.

Carbon is the most important detail to existence. With out this detail, existence as we are aware of it might not exist. As yo u will see , carbon is the vital element in compounds essential for lifestyles.

Kinds of elements :

1.) The elements are categorized as metallic, non-metal, and metalloid.

2.) The intense left aspect factors inside the periodic desk are metals, as an example, sodium, calcium, cesium, and many others.

3)  Elements on the right side are usually known as non-metals, carbon, chlorine, oxygen, and many others.

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