how many grams in a kilogram,how many quarts are in a pint and if how many ml of h20 = 1g

Answer:

it does not matter

Explanation:

g

Answer:

It doesn't matter

Explanation:

In almost all cases, chemical bonds are formed by interactions of valence electrons in atoms. To facilitate our understanding of how valence electrons interact, a simple way of representing those valence electrons would be useful. Again, it does not matter on which sides of the symbol the electron dots are positioned.

Answer:

where are the answers?

Explanation:

Answer:

\([H^+]=3.16x10^{-4}M\)

Explanation:

¡Hola!

En este caso, dado que el pH de una solución se entiende como el potencial de los iones hidrógeno en la misma, es posible recordar la ecuación que se usa para calcularlo:

\(pH=-log([H^+])\)

De este modo, al conocer el pH, se resuelve para la concentración de iones hidrógeno como se muestra a continuación:

\([H^+]=10^{-pH}\)

Así, reemplazamos el pH para obtener:

\([H^+]=10^{-3.5}=3.16x10^{-4}M\)

¡Saludos!

Answer:

How do ion charges differ for the fourth main group column and the transition metals? Do not have common charges. Transition metals tend to form positive ions, but the number of electrons that are lost varies. Describe how atoms with a large difference in electronegativity form ionic bonds.

Explanation: ?

An example of a physical change or a chemical change is Paper is shredded (physical change), an egg is fried (chemical change), wood is burned (chemical change), Dry Ice ( physical change), Newspaper Yellows in the sun (chemical change) and wax Melts on a hot Stove (physical change).

Physical changes alter a chemical material's appearance but it's not the chemical content.

Whenever a material mixes with another to generate a new compound, this is known as chemical change.

The example of physical change and chemical change.

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Below is an example of how you can fill in a data table based on the properties of minerals B through F:

A Gizmo is an interactive online simulation tool that allows users to manipulate variables and collect data to answer scientific questions.

In this case, we are likely using a Gizmo that provides information about various properties of minerals, such as their color, streak, hardness, and density. We would use the Gizmo to test each mineral and record the data we collect in a table, including information about each property for each mineral.

For example, we might find that mineral B is light green in color, has a white streak, has a hardness of 3 on the Mohs scale, and a density of 2.5 g/cm3. We would record this information in the appropriate cells in our data table. We would repeat this process for minerals C through F, and record all of our findings in the table.

Note: The properties mentioned in the table are just examples and may vary based on the actual properties of the minerals B through F.

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The amount that will be left after 115.2 years, given that you started with 10 grams sample of strontium-90 is 0.625 g

To obtain the amount that will be left after 115.2 years, we shall begin our calculation by obtaining the number of half lives that has passed.

The number of half lives that has passed can be obtained as followed:

n = t / t½

n = 115.2 / 28.8

n = 4

Thus, 4 half lives has passed.

Finally, we shall determine the amount that will be left after 115.2 years. This is illustrated below:

N = N₀ / 2ⁿ

N = 10 / 2⁴

N = 10 / 16

N = 0.625 g

Thus, we can conclude that the amount that will be left after 115.2 years is 0.625 g

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Lithium metal and water form a mixture that reacts violently. This is a chemical reaction that produces lithium hydroxide and hydrogen gas. The reaction equation is as follows: 2Li(s) + 2H2O(l) → 2LiOH (aq) + H2(g). The lithium metal is oxidized by water to produce hydrogen gas and lithium hydroxide.

This reaction is exothermic, producing heat as a result. The demonstration will include a test of the resulting solution with universal indicator. Universal indicator is a pH indicator that is used to determine the acidity or alkalinity of a solution. If the solution is acidic, the universal indicator will turn red. If the solution is alkaline, the universal indicator will turn blue. The test will determine if the solution produced in the reaction is acidic, alkaline, or neutral. If the solution is acidic, the reaction can be used to produce hydrogen gas. If the solution is alkaline, the reaction can be used to produce lithium hydroxide.

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A. 80°C to 20°C - 16.9g KNO3 per 100g of water

B. 60°C to 40°C - 14.7g KNO3 per 100g of water.

C. 50°C to 30°C - 12.6g KNO3 per 100g of water

D. 80°C to 0°C - 32.2g KNO3 per 100g of water.

E. 50°C to 10°C - 21.9g KNO3 per 100g of water

The amount of potassium nitrate that can be crystallized from a saturated solution is dependent on the temperature. As the temperature decreases, the amount of KNO3 that can be crystallized increases.

When the temperature drops from 80°C to 20°C, 16.9g of KNO3 can be crystallized from a saturated solution per 100g of water. This is the lowest amount of KNO3 that can be crystallized from a saturated solution, as the temperature cannot be lower than this.

The amount of KNO3 increases as the temperature drops from 60°C to 40°C, with 14.7g of KNO3 crystallizing per 100g of water. This pattern continues, with 12.6g of KNO3 crystallizing from a saturated solution when the temperature drops from 50°C to 30°C.

When the temperature drops from 80°C to 0°C, the highest amount of KNO3 can be crystallized from a saturated solution, with 32.2

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A total of 1909 grams of sodium are in 5. 0 x 10²⁵ atoms of sodium

The moles of a substance are given as,

Moles = Mass/Molar mass

Molar mass of sodium is 23 g/mol. We also know that the moles are given as the number of entities divided by Avogadro number.

The atoms of sodium are 5.0 x 10²⁵. The Avogadro number is 6.02 × 10²³

Moles = Number of entity/Avogadro number

So, it should be right to write,

Mass/Molar mass = Number of entity/Avogadro number

Putting all the values,

5.0 x 10²⁵/6.02 x 10²³ = Mass/23

0.83 x 10² = Mass/23

Mass = 1909 grams.

So, 1909 grams of sodium will be contained in 5.0 x 10²⁵ atoms of sodium.

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Answer:

The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore they rarely react with other elements since they are already stable

To make three-dimensional models comparing pure substances and mixtures, you can use various materials to represent different substances and mixtures. Some examples of materials that can be used are:

-Different colored beads or candies to represent different molecules

-Plasticine or play dough to represent substances

-Small containers or boxes to represent different components of the mixture

-Labels or stickers to identify each component

To create the models, you can use the following steps:

Choose the pure substance and mixture that you want to compare.

Select the materials that you will use to represent each component of the substance or mixture.

Use the plasticine or play dough to create the base for the model. This will represent the environment in which the substances or mixture will be placed.

Arrange the beads or candies to represent the atoms or molecules of the pure substance. You can arrange them in a specific pattern or shape to show the structure of the substance.

For the mixture, use the small containers or boxes to represent the different components. Label each container with the name of the component it represents.

Place the containers or boxes within the plasticine or play dough base to represent the mixture.

You can also use different colors to represent the different components of the mixture. This will make it easier to visualize the different components.

Once you have arranged the materials, you can take a photo of the model or display it in a visible location for further examination and discussion.

By using different materials and arranging them in a specific way, you can create a three-dimensional model that effectively compares pure substances and mixtures. The model can be used as a visual aid to help students better understand the properties and characteristics of these types of substances.

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Answer:

it would sink to the bottom of the ocean and break in half

Explanation:

Explanation:

so if the ship was on displaced water then the ship would sink to the bottom of the ocean

Answer:

a process which occurs when there is a difference in solute concentration between two solutions separated by a semipermeable membrane.

hope this helps

The solubility of the CuI in the 0.53 m HCN solution. The Ksp of CuI is 1.1 × 10⁻¹² and the Kf for the [Cu(CN)²]⁻ complex ion is 1 × 10²⁴ is 0.27 M.

The ability of the substance to dissolve in the solvent. The solute will dissolves in the solvent which can  be the solid, the liquid or the gas. The Increase in the temperature will increases in the solubility of the substance.

The equation is as :

CuI --->  Cu⁺   +   I⁻

The value of the Ksp = 1.1 × 10⁻¹²

Cu⁺2CN⁻  ----- >  [Cu(CN)²]⁻

Kf =  1 × 10²⁴

CuI  +   2CN⁻  ---->   [Cu(CN)²]⁻  +  I⁻

K = s² / ( 0.53 - s)

1 × 10⁵ = s² / ( 0.53 - s)

s = 0.27 M

The solubility of the CuI is 0.27 M.

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Answer:

Fluorine has 9 protons and 9 electrons

Iodine has 53 protons and 53 electrons

Explanation:

The order of increasing radius would be:  D. k, rb, kr, rb+ This is because as we move from left to right in this order, the atomic number increases and the number of electrons in the outermost shell (valence electrons) also increases.

As the valence electrons increase, the atomic radius also increases.
Therefore, k has the smallest radius as it has the least number of electrons in its outermost shell, followed by rb which has one more valence electron than k, kr which has two more valence electrons than k, and finally rb+ which has lost one electron from its valence shell making it smaller than the neutral rb atom.
Therefore, the correct order of increasing radius is option D: k, rb, kr, rb+.

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Answer:

Group 2 (IIa)

Explanation:

alkaline-earth metal are present on Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

B. intermolecular attractions.

Answer:

CaCO3... Answerrrr.....

Answer:

\(CaCO_{3}\)

Explanation:

This is because calcium is a metal that forms ions with a 2+ charge (as it has 2 electrons on its outer shell).

Carbonate ions are complex ions with a 2- charge, so with one carbonate and one calcium, the 2+ and 2- charges will cancel out.

The alkene C6H10 undergoes ozonolysis to produce two ketone products.

In ozonolysis, an alkene is treated with ozone (O3) followed by reduction with zinc and acetic acid. In the case of C6H10, the ozonolysis reaction leads to the cleavage of the double bond, resulting in the formation of two carbonyl compounds.

Specifically, the alkene C6H10 can be represented as CH2=CH(CH2)2C(CH3)=CH2.

During ozonolysis, the ozone molecule adds across the double bond, resulting in the formation of an ozonide intermediate.

This intermediate is then subjected to reductive workup using zinc and acetic acid, which leads to the formation of the final products.

In the case of C6H10, the ozonolysis reaction yields two ketone products: 3-oxohexanal and 2-oxohexanal.

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Intermolecular forces can be used to estimate relative boiling points (IMFs).The relationship between the substance's vapor pressure and boiling point depends on the strength of the IMFs.

The point at which a liquid's vapor pressure equals the gas pressure above it is known as the boiled point of the liquid. The temperature that a liquid's vapor pressure equals one atmosphere is considered the liquid's typical boiling point (760 torr). The view from a distance. view from a distance of a bubble in hot water.

Boiling point and saturation temperature are synonyms. Sometimes the measurement's pressure serves as a definition for the boiling point. The standard boiling point was established by the International Alliance of Basic and Applied Chemistry (IUPAC) in 1982 as the temperature at which water boils at one bar of pressure.

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Answer

%Yield = 87.2%

Explanation

Given:

mass of NH3 reacted = 73 g

mass of H2O produced = 101 g

We know:

molar mass of NH3 = 17,031 g/mol

molar mass of water = 18.01528 g/mol

Required: % Yield

Solution:

The formula used to calculate the percentage yield is:

%Yield = (actual yield/theoretical yield) x 100

The actual yield of H2O produced = 101 g

Now lets calculate the theoretical yield first.

First find the number of moles of NH3, and use stoichiometry to find the theoretical mass of water.

n = m/M n is the moles, m is the mass and M is the molar mass.

n = 73/17,031 g/mol

n = 4.29 mol

Using the stoichiometry, there molar ratio between NH3 and H2O is 4:6

Therefore the moles of H2O = 4.29 x (6/4)

n of H2O = 6.43 mol

The theoretical mass can then be calculated:

m = n x M

m = 6.43 mol x 18.01528 g/mol

m = 115.83 g

%Yield = (101 g/115.83)*100

%Yield = 87.2%

The absolute age of rock layer g can be determined using radiometric dating, which is based on the decay of radioactive isotopes.

Radiometric dating involves measuring the ratio of an unstable isotope to its decay product and comparing it to a known constant. By measuring the ratio of the unstable isotope to its decay product, the absolute age of the rock can be determined. In the case of rock layer g, the absolute age can be determined by measuring the ratio of the radioactive isotopes within the rock and comparing it to the known decay rate.

The absolute age of rock layer g can then be determined by multiplying the decay rate by the ratio of the isotopes, resulting in an absolute age for the rock layer. The absolute age of rock layer g is therefore 800000000 years.

Radiometric dating is a powerful tool that is used to determine the absolute age of rocks and other materials. It is based on the decay of radioactive isotopes, which decay at a known rate.

By measuring the ratio of the unstable isotope to its decay product, the absolute age of the rock can be determined. While radiometric dating can be used to accurately determine the age of rocks, it is important to be aware of any potential errors or inaccuracies that can occur when using this method.

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Answer:

See explanation

Explanation:

The reaction of NaOH and KHP is a neutralization reaction. The molarity of KHP is often calculated from the mass of KHP used to prepare the standard solution.

KHP is a slightly acidic substance. It is used as a primary standard for acid-base titrations because the solid is stable in air hence it is easy to weigh accurately. Also, the solid is neither hygroscopic nor deliquescent.

If student A recorded the amount of KHP used for the titration as 0.10g instead of 0.15g, then the molarity of NaOH calculated will be less than the actual the actual molarity of the NaOH.

The cost of a full synthetic oil change at Valvoline varies depending on the location and current promotions they are offering.

Valvoline provides various services, including oil changes, and their pricing depends on the location of the service center and other factors like discounts, promotions, and coupons. You can visit their website or call your nearest Valvoline service center to get a quote for a full synthetic oil change. The cost of a full synthetic oil change may be higher than a conventional oil change, but it is worth the investment as synthetic oil provides better engine protection and improves fuel efficiency.
However, the general price range for a full synthetic oil change is between $70 and $90. Keep in mind that prices may vary and it's always a good idea to check with your local Valvoline for the most accurate pricing.

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Answer:

C: the repulsion of electrons and electrons.

Explanation:

According to the VSEPR theory, molecular shapes adjust so that the electrons can be as far apart as possible due to electrons repelling each other, which would mean the only possible answer is C.

Answer:

law of inertia

Explanation:

The empirical formula and the m0lecular formula of the organic compound

is  CH5O3 and C2H10O6

mass % of C = 12/44 × 7.455/9.119 × 100 = 22.2938

mass % of H = 2/18 × 3.053/9.119 × 100 = 3.716

mass % of O = 100 - [ 22.2938+ 3.716]

                      = 73.991

moles of C = 22.2938/12 = 1.33 = 1.33/1.33 = 1

moles of H = 6.6999/1 = 6.66/1.33 = 5

moles of O = 73.991 / 16 = 4.5 = 4.5/1.33 = 3

empirical formula = CH5O3

Molecular formula = (empirical formula)n

n = molar mass/ empirical mass = 88.11/65 = 2

Molecular formula = C2H10O6

The most straightforward whole number ratio of atoms in a compound is its empirical formula. The empirical formula of sulphur monoxide, abbreviated SO, and disulfur dioxide, abbreviated S2O2, are two straightforward examples of this idea. As a result, the empirical formula for sulphur monoxide and disulfur dioxide, two compounds made of sulphur and oxygen, is the same. Their molecular formulae, which represent how many atoms are present in each molecule of a chemical compound, are different.

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