Which of the following is an observation of a chemical property?
Ozinc reacts with hydrochloric acid
density of wood is 0.51 g/cm³
water boils at 100°C.
sand paper is roughly textured

Answer:

D

Explanation:

When you first put it in the pot he tastes fine because you didn't let it sit for a bit but by letting it sit the salt has had time to evaporate.

The process that makes the soup so salty is the evaporation of water which makes the concentration of salt high. Thus, the correct option for this question is D.

Evaporation may be defined as a type of process through which the amount of liquid gets transformed into the gaseous phase due to extreme heat or high temperature. It is a type of vaporization that alters the surface of a liquid into the vapor phase.

According to the question, Luis added the amount of salt in the recipe and tasted it, it is fine and accurate. Then, he let the chicken soup simmer for two hours to blend the flavors, at that time he found that the soup was too salty.

Therefore, some water evaporated and concentrated the salt is the best statement that illustrates a valid and accurate reason behind the high concentration of salt. Thus, the correct option for this question is D.

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Answer:

\(Cl^-\)

Explanation:

Hello.

In this case, when chlorine gets ionized by gaining one electron it goes:

\(Cl^-\)

Whose electron configuration is the same as argon:

\(Cl^-=Ar:1s^2,2s^2,2p^2,3s^2,3p^6\)

Since the both of them have 18 electrons, they become isoelectric with the same neutral charge.

Best regards.

Answer: It is a leaf hanging on a tree

Explanation:

Gravitational Potential Energy (GPE) is energy that is stored and ready to be transformed to kinetic energy when it becomes in motion.

A light bulb has heat and light energy, so it can't be that

A mouse eating cheese is the mouse taking in chemical energy, so no

A car sitting in the driveway has chemical potential energy because it cant move unless the ignition transforms into kinetic energy.

So the only option left is a leaf hanging on a tree.

Answer:

2.275x10⁶g of CN⁻¹ were dissolved in the sample

Explanation:

Molarity is defined as the ratio between moles of solute and liters of solution.

If a CN⁻¹ solution has a concentration of 25mM, there are 0.025 moles of CN⁻¹ per liter of solution.

If the sample has a colume of 3.5x10⁶L, moles of CN⁻¹ are:

3.5x10⁶L × (0.025moles / L) = 8.75x10⁴ moles of CN⁻¹ in the sample of water.

In grams (As molar mass of CN⁻¹ is 26g/mol):

8.75x10⁴ moles CN⁻¹ × (26g / mol) = 2.275x10⁶g of CN⁻¹ were dissolved in the sample

The preferred arrangement of electrons in a molecular structure can be determined by calculating the electronic configuration of each atom in the molecule.

What is electronic configuration?

The electronic configuration of an atom is determined by the number of protons in the nucleus and the specific rules governing the filling of energy levels and orbitals. The electronic configuration is usually represented using a notation that indicates the number of electrons in each energy level or orbital.

what is delocalized electron ?

Delocalized electrons are electrons that are not restricted to a specific location or region in a molecule or material, but instead are spread out over multiple atoms or molecules. In other words, delocalized electrons are free to move throughout a larger region instead of being confined to a single atom or bond.

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Answer:

solvent

Explanation:

Answer:

5.37 × 10⁻⁴ mol/L

Explanation:

A chemist makes 660. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a 0.00154 mol/L stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

Step 1: Given data

Step 2: Calculate the concentration of the final solution

We want to prepare a dilute solution from a concentrated one. We can calculate the concentration of the final solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁ / V₂

C₂ = 0.00154 mol/L × 230. mL / 660. mL = 5.37 × 10⁻⁴ mol/L

In order to lower the temperature of 350 mL of water from 24°C to 6°C, we need to calculate the amount of heat energy that needs to be removed from the water. We can use the formula:

Q = mcΔT

where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

The specific heat capacity of water is 4.184 J/g°C. Since the density of water is 1.0 g/mL, the mass of 350 mL of water is 350 g.

Q = (350 g) (4.184 J/g°C) (18°C)

Q = 30,276 J

To remove this much heat energy, we can use ice to cool the water. The heat of fusion of water is 333.55 J/g, which is the amount of heat energy required to melt one gram of ice at 0°C.

Q = (m)(333.55 J/g)

m = Q / 333.55 J/g

m = 30,276 J / 333.55 J/g

m = 90.4 g

So, 90.4 grams of ice at 0°C would have to melt to lower the temperature of 350 mL of water from 24°C to 6°C.

I choose the lower limit 0.024 mg/kg/day

1 pound = 0.453592 kg

135 pounds = 61.235 kg

dosage/day = 0.024 x 61.235 = 1.47 mg

Answer:

See below

Explanation:

I will use the approximate AVERAGE

                         of the dosage range  ~ .20 mg/kg/week

135 pounds = 61.23 kg

Now , for SEVEN days/week dosing:

61.23 kg  * .20 mg/kg-wk  /  7 days/week  = 1.75 mg/day

Lewis electron dot notation is a method for representing the valence electrons in an atom. In this notation, the valence electrons are shown as dots around the symbol of the element. The number of dots represents the number of valence electrons.

The Lewis electron dot notation is a useful tool for understanding the chemical behavior of elements. It allows us to see how many valence electrons an atom has and how they are distributed. This information can be used to predict the types of chemical bonds that an atom is likely to form. For example, the Lewis electron dot notation for nitrogen is:
N: ·
Nitrogen has five valence electrons, so there are five dots around the symbol.
In addition to representing individual atoms, the Lewis electron dot notation can also be used to represent molecules. In a molecule, the dots represent the shared electrons between the atoms.  The Lewis electron dot notation is an important concept in chemistry that helps us to understand the properties and behavior of atoms and molecules.

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There are 3 moles of carbon in 57.77 g of leucine.

Molar mass is the mass of one mole of a substance, typically expressed in units of grams per mole (g/mol).

To determine the number of moles of carbon in 57.77 g of leucine, we first need to find the molar mass of leucine.

The molar mass of leucine can be calculated by adding the atomic masses of all the elements in its chemical formula (C6H13NO2):

(6 x 12.01 g/mol) + (13 x 1.01 g/mol) + (1 x 14.01 g/mol) + (2 x 16.00 g/mol) = 131.18 g/mol Next, we can use the molar mass of leucine to convert the given mass of 57.77 g into moles:

57.77 g / 131.18 g/mol = 0.4408 mol

Finally, to determine the number of moles of carbon in 57.77 g of leucine, we can use the ratio of the number of carbon atoms to the total number of atoms in one molecule of leucine:

(6 carbon atoms / 1 molecule) x (0.4408 mol) = 2.645 moles of carbon

Therefore, there are 3 moles of carbon atoms in 57.77 g of leucine.

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Answer:

Sp3

Explanation:

According to the question, atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds.

Whenever nitrogen is bonded to three atoms via single bonds (in this case two carbon atoms and one hydrogen atom) the nitrogen atom is sp3 hybridized and in tetrahedral geometry. The lone pair on nitrogen atom occupies one of the hybrid sp3 orbitals.

Cyanazine is used as an herbicide to control the growth of weeds and annual grasses. The herbicide has been phased out due to increased toxicity to the environment and humans.

The hybridization of the molecule is sp³.

The given information in the question suggests that Nitrogen (atom 1) to two Carbon atoms and single bonded to 1 hydrogen atom.

The nitrogen is bonded with three single bonds, two with carbon and one with a hydrogen bond.

Based on the given data, the hybridization of the molecule will be sp³ and will have tetrahedral geometry. The lone pair present on the nitrogen atom will occupy one of the hybrid sp³ orbitals.

Therefore, the sp3 hybridization of the cyanazine molecule will exist.

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Answer:

a) protons 6

electrons 6

valance electrons 4

shells 2

b) protons 8

electrons 8

valance electrons 6

shells 2

The mass of chlorine gas product formed is 61.4 g.

What is the mass ?

First, we need to determine which reactant is limiting and which is in excess. To do this, we can use the given mass of HCl and convert it to moles:

63.2 g HCl × (1 mol HCl/36.46 g HCl) = 1.73 mol HCl

Next, we can use stoichiometry to determine how many moles of \(Cl_{2}\) will be produced from 1.73 mol of HCl:

1.73 mol HCl × (2 mol \(Cl_{2}\)/4 mol HCl) = 0.865 mol \(Cl_{2}\)

Finally, we can convert the moles of \(Cl_{2}\) to grams using its molar mass:

0.865 mol \(Cl_{2}\) × (70.91 g \(Cl_{2}\)/1 mol \(Cl_{2}\)) = 61.4 g \(Cl_{2}\)

Therefore, the mass of chlorine gas product formed is 61.4 g.

What is stoichiometry ?

Stoichiometry is a branch of chemistry that deals with the calculation of the quantities of reactants and products involved in a chemical reaction. It involves using balanced chemical equations to calculate the amounts of reactants required to produce a certain amount of product, or the amount of product that can be obtained from a given amount of reactant. Stoichiometry is an important tool for predicting the outcomes of chemical reactions and for designing chemical processes in industry.

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Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer: Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products, and ATP is the energy that is transformed from the process.

The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

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Aldehydes and Ketones. Aldehydes and ketones are classes of organic compounds that contain a carbonyl (C=O) group.

that's the correct answer

can I get brainilest

Answer:

Some natural resources like sunlight and wind are found everywhere, but other natural resources are unevenly distributed. Resources like oil, coal, and natural gas are only found where conditions were favorable to grow and preserve large quantities of animal or plant matter.

Explanation:

Nadia will take 8 seconds to reach her friend's house.

Speed is the measure of the distance traveled by an object per unit of time. It is a scalar quantity and is typically expressed in units such as meters per second (m/s), miles per hour (mph), or kilometers per hour (km/h).

To calculate the time Nadia will take to reach her friend's house, we can use the formula;

time = distance / speed

where distance is the amount of space traveled by an object, and time is the duration of travel.

Put the values given in the problem, we have:

time = 24 meters / 3 m/s

time = 8 seconds

Therefore, Nadia will take 8 seconds.

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Answer:

C) one magnesium and one oxygen

Answer:

roots

Explanation:

i just learned about this

Can i have brainlist??

Answer:

hope i got it right you don't have to give a brainiest if u don't want to OK

Explanation:

Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposes.

Answer:

33.60 g

Explanation:

In order to solve this problem we need to know the density of pure copper. That value can be found on the periodic table or in textbooks: 8.96 g/cm³.

Knowing the density of copper, we can calculate the mass of a sample that occupies 3.75 cm³:

This substance's empirical formula is \(C_{27}H_{48}O\).

The empirical formula for a compound is the simplest whole-number ratio of atoms of each element present in the compound. In this case, the compound contains 324 g of C, 48.5 g of H and 16.0 g of O. To calculate the empirical formula, we divide the mass of each element by its atomic mass. For C, divide 324 g by 12.01 g/mol, for H divide 48.5 g by 1.008 g/mol, and for O divide 16.0 g by 16.00 g/mol. Doing this gives us 27 moles of C, 48 moles of H and 1 mole of O. Since the numbers are not whole numbers, they need to be reduced to the lowest whole-number ratio. To do this, divide each number by the smallest of the three, which is 1 mole of O. This gives us 27 moles of C, 48 moles of H and 1 mole of O.Hence, this compound's empirical formula is \(C_{27}H_{48}O\).

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

Explanation:

Dmitri Mendeleev was a Russian scientist that proposed the first periodic table of elements. Elements in his periodic table were arranged according to there relative atomic mass; however cobalt (Co) with an atomic mass of 58.93 was placed before nickel (Ni) with an atomic mass of 58.69 which was an anomaly as according to his law, nickel should come before cobalt since nickel has a lesser mass compared to cobalt.

Positional isomers are a type of structural isomers in which molecules have the same molecular formula but differ in the position of functional groups or substituents on the carbon chain.

One example of positional isomers with the same molecular formula, C4H8O, are butanal and 2-methylpropanal. The structures and names for each isomer are:

Butanal: CH3CH2CH2CHO

2-Methylpropanal: CH3CH(CH3)CHO

What makes these isomers positional is that they have the same atoms and functional group, but they differ in the position of the methyl group on the carbon chain. In butanal, the carbonyl group is at the end of the carbon chain, while in 2-methylpropanal, the carbonyl group is on a carbon that is two positions away from the end of the chain.

These isomers are also considered to be structural isomers because they have different bonding arrangements between atoms. The location of the methyl group on the carbon chain changes the overall shape and size of the molecule, leading to different chemical and physical properties. This is the hallmark of structural isomers - that they have the same molecular formula, but different structural arrangements of atoms.

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Answer:

Nacio, is contained in 400 grams of water whose molality ... Molality= moles of solute / mass of solvent in Kg Now molality=0.60 Mass

Explanation:

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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