he density of silver is 10.5 g/cm3. what is the mass of a bar of silver in kilograms that measures 5.50 cm x 3.75 cm x 2.10 cm?

A thick layer of ice on a lake can support the weight of a person because ice is a solid state of water, while liquid water cannot support the weight due to its inherent fluidity.

Ice and liquid water are both forms of the same substance, H2O, but their molecular arrangements and physical properties differ. When water freezes, its molecules form a crystalline structure, creating a rigid network of interconnected ice molecules. This structure gives ice its solid and stable nature, allowing it to bear weight without collapsing. The lattice-like arrangement of molecules in ice makes it capable of withstanding pressure and maintaining its shape.

On the other hand, liquid water lacks a fixed molecular arrangement. The molecules in liquid water are more loosely packed and have higher mobility compared to ice. As a result, liquid water is fluid and doesn't have the structural integrity necessary to support the weight of a person or any significant load. The molecules in liquid water easily flow past each other, adapting to the shape of their container and exhibiting behaviors such as surface tension.

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Answer: 10y/s

Explanation:

Answer:results from the attractive force between a hydrogen atom covalently bonded to a electronegative atom

Explanation:

Answer:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

Explanation:A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium.

PLEASEEEEE CAN SOMEONE HELP MEEE??? (iI have TWO questions PLSPLSPLSPSLPLSPLSPLSP)

3.) What happened to Patroclus at the end of yesterday's reading?

He won the battle.

He went to Mt. Olympus to talk to Zeus.

He died.

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4.Who was Agamemnon trying to persuade to come fight with him again?

Patroclus

Achilles

Odysseus

Hector

Answer:

High explosives do not need to be contained to make their bang. Nitroglycerine, trinitrotoluene, and RDX are high explosives.

Explanation:

To determine the enthalpy change of the given reaction (6A + 1C -> 6D), we will use the provided reactions and their respective enthalpy changes (H): Reaction 1: 6B -> 1C, H = -379.8 kJ Reaction 2: A + B -> D, H = -95.7 kJ. Enthalpy change of the given reaction is -194.4 kJ.

First, let's adjust Reaction 2 to match the given reaction. Since 6D is needed, we will multiply Reaction 2 by 6:
Adjusted Reaction 2: 6A + 6B -> 6D, H = -574.2 kJ (multiplying -95.7 kJ by 6)
Now, we will rearrange Reaction 1 so that 1C is on the left side of the equation:
Adjusted Reaction 1: 1C -> 6B, H = 379.8 kJ (reversing the reaction)

Finally, we will sum the adjusted Reaction 1 and adjusted Reaction 2 to obtain the given reaction:
6A + 1C -> 6D (Adjusted Reaction 1 + Adjusted Reaction 2)
H = 379.8 kJ (Adjusted Reaction 1) + (-574.2 kJ) (Adjusted Reaction 2)

This means that the reaction is exothermic, as it releases energy in the form of heat. The Hess's Law of constant heat summation allows us to calculate the enthalpy of a reaction using the enthalpies of its reactants, making it a useful tool in chemical thermodynamics H = -194.4 kJ, The enthalpy change of the given reaction (6A + 1C -> 6D) is -194.4 kJ.

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Assuming excess zinc, 2.33 moles of hydrochloric acid would produce 645.13 grams of zinc chloride.

The balanced chemical equation for the reaction between hydrochloric acid and zinc is: Zn + 2HCl → ZnCl2 + H2.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and zinc (Zn) is:

Zn + 2HCl → ZnCl2 + H2

This equation tells us that 1 mole of zinc reacts with 2 moles of hydrochloric acid to produce 1 mole of zinc chloride and 1 mole of hydrogen gas. Therefore, to determine how much zinc chloride is produced when 2.33 moles of hydrochloric acid reacts completely, we need to use stoichiometry.

First, we need to determine how many moles of zinc chloride would be produced from 2.33 moles of hydrochloric acid. From the balanced equation, we know that the ratio of hydrochloric acid to zinc chloride is 2:1. Therefore, the number of moles of zinc chloride produced would be half the number of moles of hydrochloric acid used:

2.33 moles HCl x (1 mole ZnCl2 / 2 moles HCl) = 1.165 moles ZnCl2

Next, we need to convert moles of zinc chloride to grams. The molar mass of zinc chloride is the sum of the atomic masses of one zinc atom and two chlorine atoms:

1 zinc atom x 65.38 g/mol = 65.38 g/mol Zn

2 chlorine atoms x 35.45 g/mol = 70.90 g/mol Cl

Total molar mass = 65.38 g/mol + 70.90 g/mol = 136.28 g/mol ZnCl2

Now we can use this molar mass to convert moles of zinc chloride to grams:

1.165 moles ZnCl2 x 136.28 g/mol ZnCl2 = 158.3 grams ZnCl2

Therefore, 2.33 moles of hydrochloric acid reacting completely would produce 158.3 grams of zinc chloride.

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Answer:

A

Explanation:

10ml

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The hydrosphere include glaciers, groundwater, and polar ice. That is option A, B and C.

Hydrosphere is defined as the part of the earth that is made up of water which includes the surface of the planet, underground, and in the air.

The water found in the hydrosphere of earth moves in cycles in such a way that non is lost.

The components of the hydrosphere include the following:

The polar ice is part of the hydrosphere because it is the frozen part of the earth's hydrosphere.

The lava is not part of the hydrosphere but part of lithosphere and it's released when volcanic eruptions occurs.

Therefore is can be concluded that glaciers, groundwater, and polar ice are parts of the hydrosphere while the lava is not part of the hydrosphere.

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The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer: One of the most striking features of many protist species is the presence of some type of locomotory organelle, easily visible under a light microscope. A few forms can move by gliding or floating, although the vast majority move by means of “whips” or small “hairs” known as flagella or cilia, respectively. (Those organelles give their names to informal groups—flagellates and ciliates—of protists.) A lesser number of protists employ pseudopodia. Those same organelles may be used in feeding as well.

Explanation:

Answer:

There is 9.6 grams of CO2 produced

Explanation:

Step 1: Data given

Mass of methane = 5.50 grams

Molar mass of methane = 16.04 g/mol

Mass of oxygen = 13.9 grams

Molar mass of oxygen = 32.0 g/mol

Step 2: The reaction

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

Step 3: Calculate number of moles

Moles = mass / molar mass

Moles methane = 5.50 grams / 16.04 g/mol

Moles methane = 0.343 moles

Moles oxygen = 13.9 grams / 32.0 g/mol

Moles oxygen = 0.434 moles

For 1 mol CH4 we need 2 moles O2 to produce 1 mol CO2 and 2 moles H2O

O2 is the limiting reactant. It will completely react (0.434 moles).

There will react 0.434/2 = 0.217 moles CH4

There will remain 0.343-0.217 = 0.126 moles CH4

There will be produced 0.434 moles of H2O and

0.434/2 =0.217 moles of CO2

Step 4: Calculate mass of products

Mass = moles * molar mass

Mass CO2 = 0.217 moles ¨44.01 g/mol

Mass CO2 = 9.6 grams

Mass H2O = 0.434 moles * 18.02

Mass H2O = 7.8 grams

The heating of the substance resulted in the transfer of energy and thereby increase the randomness. Thus, Alana's error can be rectified by switching the labels on the diagram.

The atoms are the smallest particles, and everything is made of atoms. The atoms in the object are arranged in a specific lattice to give shape to the object.

The heating resulted in the transfer of energy to the atoms, and the atoms started to move thereby will not be linearly arranged after heating.

Thus, the heating and the atomic arrangement effect can be explained by switching the labels on Alana's diagram. thus, option D is correct.

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Answer:

D

Explanation:

Switch the labels on the diagrams

True, most acidic substances (hydrogen ions) originate as by-products of cellular metabolism.

Cellular metabolism is the set of chemical reactions that occur within a cell to sustain life. These reactions are vital for the growth, development, and maintenance of the cell and the organism as a whole. Cellular metabolism involves two main processes: catabolism and anabolism.

Catabolism is the breakdown of complex molecules into simpler ones, which releases energy that can be used by the cell. The most important catabolic pathway is cellular respiration, which converts glucose and other nutrients into carbon dioxide, water, and energy in the form of ATP.

Anabolism, on the other hand, is the synthesis of complex molecules from simpler ones. This process requires energy, which is supplied by ATP produced during catabolism. Anabolic pathways include the synthesis of proteins, nucleic acids, and lipids.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

C

Explanation:

C) an atom with an atomic number of 18

The mass percent of glycerol in the solution is approximately 2.55%.

Explanation:

The mass percent of glycerol in the solution can be calculated as shown below:

First, the mass of the solution can be calculated using the following formula:

Mass of the solution = Density of the solution x Volume of the solution

The volume of the solution is not given, so let us assume a volume of 1 liter (1000 ml) of the solution, which is a common assumption.

Therefore, Mass of the solution = 1.1663 g/ml x 1000 ml= 1166.3 g

Next, the mass of glycerol in the solution can be calculated using the mole fraction and molecular weight of glycerol. The molecular weight of glycerol (C3H8O3) can be calculated as follows:

Molecular weight of glycerol (mm of C3H8O3) = 3 x atomic weight of C + 8 x atomic weight of H + 3 x Atomic weight of O= 3(12.01) + 8(1.008) + 3(16.00) = 92.09 g/mol

Now, the mass of glycerol in the solution can be calculated using the following formula:

Mass of glycerol = Mole fraction of glycerol x Mass of the solution x Molecular weight of glycerol Mass of glycerol = 0.258 x 1166.3 g x 92.09 g/mol= 29.70 g

Finally, the mass percent of glycerol in the solution can be calculated using the following formula:

Mass percent of glycerol = Mass of glycerol / Mass of the solution x 100%Mass percent of glycerol = 29.70 g / 1166.3 g x 100%≈ 2.55%

Therefore, the mass percent of glycerol in the solution is approximately 2.55%.

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Answer: The charge on the cobalt ion is 2+.

Explanation:

Consider the substance cobalt phosphate: Co3(PO4)2.

We memorize that the phosphate ion has negative 3 charge:  PO4^3-

So, with two phosphate ions, the charge will be negative 6 overall.

With three cobalt ions, we require a charge of 2+ on each to balance the substance.

The charge on each cobalt (Co) Ion in cobalt phosphate [Co3(PO4)2] is 2+ as this is required to balance the 6- charge of the two phosphate ions in the compound.

The charge on a cobalt (Co) Ion in cobalt phosphate [Co3(PO4)2] is determined based on the balance ion charge in the compound. The phosphate ion (PO4) has a charge of 3- and there are two of these ions in the compound, summing up to a total charge of 6-. There are three cobalt ions in the compound, so to balance the 6- charge of the phosphates, each cobalt Ion must carry a charge of 2+. In other words, the cobalt ion in cobalt phosphate [Co3(PO4)2] is 2+ (or option B).

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The specific heat of the substance  : c = 0.235 J/g  °C

Given

Heat absorbed by substance = 419.7 J

m = mass = 23.5 g

Δt = Temperature difference : 76 °C

Required

The specific heat

Solution

Heat can be formulated

Q = m.c.Δt

Input the value :

419.7 = 23.5 x c x 76

c = 419.7 : (23.5 x 76)

c = 0.235 J/g  °C

Answer:

We use the following formula as given below Use the formula below to find the lone pair on the oxygen atom of the SO3 molecule. L.P (O) = V.E (O) – N.A (S-O) Lone pair on the terminal oxygen atom in SO3 = L.P (O)

Explanation:

The organic molecule would have a C-H stretching band at 2923 cm-1, a carbonyl stretching band at 1667 cm-1, and a C-O stretching band at 1245 cm-1.

Based on the IR bands given, we can predict the functional groups present in the organic molecule. The band at 2923 cm-1 indicates a C-H stretching vibration, which suggests the presence of alkyl or aromatic groups. The band at 1667 cm-1 indicates a carbonyl stretching vibration, which is characteristic of ketones and aldehydes.

The band at 1245 cm-1 indicates a C-O stretching vibration, which could suggest the presence of an alcohol or ether group. Finally, the band at 1054 cm-1 could indicate the presence of a C-O stretching vibration in a carboxylic acid or ester group. However, without additional information or further analysis, we cannot confidently predict the presence of this last functional group.

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Answer:

The options that apply to the description of grid-lines of the map are;

They are measured in degrees

They set up a reference system

They divide Earth into four equal parts

FIRST OPTION , SECOND OPTION and FIFTH OPTION are correct.

Explanation:

FIRST OPTION gave the describtion that the grid-lines of the map are measure in degrees,this option is applied to the gridlines on a map because the grid are lined as a result of angular measurement which makes it to makes the unit to be measured degrees and angles.

SECOND OPTION described it as been set up by a reference system which let us know that the area that are plotted were all grid as a result of the size

FIFTH OPTION also applied to the

description of the gridlines on a map because the Earth is divided into 4 equal parts through the Prime Meridian i.e the latitudinal line and longitudinal line .

.

Answer:

They are measured in degrees.

They set up a reference system.

They divide Earth into four equal parts.

Explanation:

i took the test

When there is excess glucose and amino acids in the liver, and no more ATP needs to be synthesized, these energy-rich nutrients are converted to glycogen and fatty acids.

Both glycogen and fatty acids are forms of energy storage molecules.

What happens to excess glucose in the liver?

Excess glucose in the liver is stored as glycogen. When the body requires glucose for energy, glycogen is broken down to glucose in a process known as glycogenolysis.

Gluconeogenesis is the process by which glucose is generated from non-carbohydrate sources, such as amino acids and fatty acids.

When there is an excess of amino acids, the liver transforms them into glucose or fat as well. The body can use glucose and fat for energy or store it in adipose tissue for later use. Fatty acids are synthesized from acetyl-CoA units, which can be derived from both glucose and amino acids.

The liver is capable of maintaining glucose homeostasis in the body. It is capable of releasing glucose into the bloodstream, maintaining glucose levels at a stable level in the body when necessary.

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The amount of heat absorbed when 182.7 g of Fe3O4 decomposes into Fe and O2 is 885.6 kJ.

The given chemical equation shows that the decomposition of 1 mole of Fe3O4 releases 1120.5 kJ of heat energy. To find the amount of heat absorbed when 182.7 g of Fe3O4 decomposes, we first need to determine the number of moles of Fe3O4 present.

The molar mass of Fe3O4 is:

(3 x atomic mass of Fe) + (4 x atomic mass of O) = (3 x 55.85 g/mol) + (4 x 16.00 g/mol) = 231.53 g/mol

The number of moles of Fe3O4 is:

182.7 g / 231.53 g/mol = 0.7894 mol

Now, we can use stoichiometry to calculate the amount of heat absorbed:

0.7894 mol Fe3O4 x (1120.5 kJ / 1 mol Fe3O4) = 885.6 kJ

Decomposition is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This reaction can occur through various processes, such as heating, exposure to light, or addition of a catalyst.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer

D

Explanation:

The formula is going to be Products / Reactants.

That means only B and D can be correct. The balance numbers to the equation are the powers which means that the answer is D

The molarity of the solution if I add 3.2 moles of NaCl to 1.7L of solution is 1.9 M (option C).

The molarity of a solution is the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

Molarity of a solution can be calculated by dividing the number of moles of the solute by its volume as follows:

Molarity = no of moles ÷ volume

According to this question, 3.2 moles of NaCl was added to 1.7L of solution. The molarity can be calculated as follows:

Molarity = 3.2 moles ÷ 1.7L

Molarity = 1.9M

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Answer:

a.) It matches the universal pH indicator and is indicating the proper pH.

Explanation:

it says its the answer.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.