An unknown object has a mass of 15 g and its volume is 9 cm^3. Calculate the density and determine if the item would sink or float in water.

The element that would move with the fastest average speed while in thermal equilibrium in the atmosphere is hydrogen.

Hydrogen (H) is a colorless, tasteless, odorless, flammable and gaseous substance that is the simplest member of the family of chemical elements. Hydrogen, with the atomic number 1, is the lightest chemical element in the universe. It is also the most abundant element in the universe.

A hydrogen atom has a nucleus consisting of a proton bearing a unit of positive electrical charge; an electron, bearing a unit of negative electrical charge, is also associated with this nucleus.

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In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.

TPolysaccharides, which are the most ubiquitous carbohydrates in nature, serve a number of functions, including energy storage and incorporation into plant cell walls.

Tens to thousands of monosaccharides are joined together via glycosidic linkages to form large polymers known as polysaccharides. The three most frequent polysaccharides are starch, glycogen, and cellulose. They are collectively referred to as homopolymers because, after complete hydrolysis, each of these three exclusively yields one type of monosaccharide (glucose).

Heteropolymers may also comprise sugar acids, amino sugars, or non-carbohydrate substances in addition to monosaccharides. Polysaccharides, a class of non-reducing carbohydrates, are not sweet and do not change. 

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Answer:

+1

Explanation:

Electrochemistry. In oxidation–reduction (redox) reactions, electrons are transferred from one A redox reaction is balanced when the number of electrons lost by the reductant Hg(l)∣Hg2Cl2(s)∣Cl−(aq) ∥ Cd2+(aq)∣Cd(s).

As is evident from the Stock number, mercury has an oxidation state of +1. This makes sense, as chlorine usually has an oxidation state of -1.

The  oxidation state of Hg in Hg₂Cl₂ compound is +1 as both subscripts of elements are eliminated.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Answer:

Cells are made of several parts that work together.

Explanation:

It is this because bacteria are made of 1 cell, unicellular. All living things do not have to have more than 1 cell proven by bacteria which has one cell. And cells are living meaning it has to make up living things.

Hope this helps:)

Answer:

Option 3

Explanation:

Cells are made up of several parts (Organelles) that work together resulting in the functioning of the cell which further results in the functioning of the whole body.

Answer:

it's 8

Explanation:

the last group of the periodic table is group 8. so all elements in a group should have the same number of valency electrons

Answer:

A. Sympathetic

and

C. Parasympathetic

Explanation:

Ap3x

Based on the balanced equation of the reaction, the completed table is  as follows:

2.0 moles of N₂, 56 g of N₂; 1.0 moles of Ti₃N₄; 200.0 g of Ti₃N₄

6.0 moles of N₂, 168 g of N₂; 3.0 moles of Ti₃N₄; 600.0 g of Ti₃N₄

1.0 moles of N₂, 28 g of N₂; 0.5 moles of Ti₃N₄; 100.0 g of Ti₃N₄

7.0 moles of N₂, 196 g of N₂; 3.5 moles of Ti₃N₄; 700.0 g of Ti₃N₄

12.6 moles of N₂, 352.8 g of N₂; 6.3 moles of Ti₃N₄; 1260.0 g of Ti₃N₄

A balanced equation is one for a chemical reaction in which the overall charge and the number of atoms for each component are the same for both the reactants and the products.

In other words, the moles of atoms of elements on both sides of the reaction are equal.

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2 mL of KCl stock and 8 mL of pond water, working solution concentration is 66.22

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent

Here given data is

KCl stock = 2 mL

pond water = 8 mL

We have to calculate working solution concentration = ?

KCl = 74.55g/mol water = 18.01g/mol

So, C₁V₁ = C₂V₂

C₁ =  74.55g/mol

V₁ = 2 mL

C₂ =  18.01g/mol

V₂ = 8 mL

So,  74.55g/mol × 2 mL = 18.01g/mol×8 mL

Concentration = 66.22

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Answer:

The correct answer is - A. Ethanol reduces air pollution.

Explanation:

Ethanol is believed to be better fuel for the environment than other petroleum fuels. Ethanol emits lower carbon dioxide as it is clean smokeless fuel, and produces less or the same oxides of nitrogen and hydrocarbons.

It is produced by the process of fermentation of molasses by yeast. Mixing it with the other fuels is found to be CO2 reduces by 30% of emissions to the atmosphere.

Answer:

From unit Symbol Equals Result To unit Symbol

Explanation:

 is this volume??? i need specifics

We require the equation to understand the process that occurs when X reacts with Y to form an ionic compound.The chemical equation for the formation of the ionic compound between X and Y would be: X + Y → XYwhere X represents the alkali metal in group I and Y represents a non-metal that is most likely in group VII. This equation represents the process of how the two elements react with each other to create an ionic compound.

Element X is found in group I of the periodic table, which means it belongs to the alkali metal group. Alkali metals are well-known for their reactivity, with the exception of lithium, which is the least reactive alkali metal. Alkali metals react with other elements to form ionic compounds. Let’s take a closer look at this process.Element X reacts with Element Y to create an ionic compound, which means that Element X becomes an ion in the process. Since Element X is an alkali metal, it has only one valence electron.

To form a positive ion, it loses this valence electron.Element Y, on the other hand, is probably a non-metal since it’s reacting with an alkali metal. Non-metals, unlike alkali metals, have a high electronegativity. As a result, they have a tendency to take electrons from other elements in order to complete their valence shells.

As a result, Element Y gains an electron in this instance.Since X loses its valence electron and Y gains an electron, X becomes a positive ion and Y becomes a negative ion. The resulting ionic compound is formed by the attractive forces between the positive and negative ions. The formula of the ionic compound is determined by the ratio of the ions present.

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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Electrical energy is caused by moving particles that have a negative or positive charge. These charged particles are called electrons. The faster the electrons are moving, the more electrical energy they carry. Electrical energy commonly moves through a wire in an electrical circuit.

                                     \(\huge\boxed{Electrons.}\)

Electrons are particles that move to create electricity. In other words, they are responsible for electric currents. Thus, the answer should be Electrons.

The equilibrium constant of the reaction from the calculation that has been done is 0.154

The concentrations (or partial pressures) of reactants and products in chemical equilibrium for a specific chemical reaction are related by the equilibrium constant (K), a mathematical equation. It quantifies the degree to which an equilibrium has been reached in a reaction.

We have the equation of the reaction as;

A(g) + B(g) ⇔C(g)

Thus;

Keq = 45.83/11.23 * 26.50

Keq = 0.154

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Given :

Half-life of Iodine , \(t_{0.5}=8 \ days\) .

Initial concentration , \([A_o]=100\ mg\) .

To Find :

The amount of sample remains after 32 days .

Solution :

Rate constant is given by :

\(k=\dfrac{0.693}{t_{0.5}}\\\\k=\dfrac{0.693}{8}\ s^{-1}\\\\k=0.086625\ s^{-1}\)

Now , by rate law :

\([A]=[A_o]e^{-kt}\)

Putting all given values, we get :

\([A]=100\times e^{-(0.086625)\times 32}\\\)

\([A]=6.25\ mg\)

Therefore , the remaining sample after 32 days is 6.25 mg .

Hence , this is the required solution .

In addition to these physical characteristics, loam also contains decayed plant and animal matter

Loam is a type of soil that contains a mixture of gravel, sand, silt, and clay. It is considered to be one of the best types of soil for growing plants because of its ability to retain water and nutrients while still allowing for adequate drainage.

which provides organic matter and nutrients that are essential for plant growth. Unlike other types of soil, loam does not contain highly toxic metals that can be harmful to plants and the environment.

Instead, it contains essential minerals such as potassium and ammonium that are important for plant growth. In summary, loam is a healthy mixture of physical and organic components that make it an ideal soil for gardening and farming.

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Answer:

It chemistry babe

Explanation:

Cool the bauxite complex to allow the aluminum hydroxide to precipitate.Dissolve the aluminum oxide in molten cryolite. Separate the aluminum from the oxide by electrolysis in an electrolytic cell.

A trained electrologist inserts a short wire into the hair follicles that are located at the skin's surface. An electric current that exits the follicle and travels down the wire damages the hair root. Damage to the follicles prevents the growth of new hair and causes the existing hair to fall out.

The main industrial procedure for smelting aluminum is called the Hall-Héroult process. It entails dissolving aluminum oxide (alumina), which is most frequently derived from bauxite, the primary ore of aluminum, using the Bayer process, in molten cryolite, and electrolyzing the molten salt bath, usually in a cell that has been specifically designed for the purpose.

Mix the bauxite ore with concentrated sodium hydroxide to form sodium aluminum hydroxide complex.

Heat the Al(OH)3 to drive off water, leaving Al2O3.

Filter out the sodium aluminum hydroxide complex to allow the aluminum hydroxide to precipitate.

Electrolyze the aluminum oxide in the presence of cryolite in an electrolytic cell.

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Answer: A. B and C

Explanation:

I'm pretty sure this is right....

Have a great day :)

Answer: It is A,B. and C.= Add hot water to the tub.

Heat the water in the tub without adding more water.

Add more water at the same temperature to the tub.

Explanation: I got it correct.

Based on the presence of the 'a' form of glycogen phosphorylase, it is likely that only the R form exists, allosteric effectors are more potent, and glucagon is in the bloodstream.

Based on the given information that the 'a' form of glycogen phosphorylase is present, the following statements are likely:

Only the R form exists: The 'a' form of glycogen phosphorylase corresponds to the active, phosphorylated form. In this state, only the R (relaxed) form exists. The T (tense) form is the inactive, non-phosphorylated state.

Allosteric effectors are more potent: The R form of glycogen phosphorylase is more sensitive to allosteric effectors, meaning that these effectors are more potent in regulating its activity. Allosteric effectors can activate or inhibit the enzyme's function by binding to specific allosteric sites.

Glucagon is in the bloodstream: Glucagon is a hormone released by the pancreas in response to low blood sugar levels. It stimulates the breakdown of glycogen into glucose, activating glycogen phosphorylase. Therefore, when the 'a' form of glycogen phosphorylase is present, it suggests that glucagon is in the bloodstream.

The following statement is not likely:

Insulin is in the bloodstream: Insulin is a hormone released by the pancreas in response to high blood sugar levels. It promotes the storage of glucose as glycogen and inhibits glycogen phosphorylase activity. Therefore, when the 'a' form of glycogen phosphorylase is present, it indicates a state of glycogen breakdown, which is not consistent with insulin being in the bloodstream.

In conclusion, based on the presence of the 'a' form of glycogen phosphorylase, it is likely that only the R form exists, allosteric effectors are more potent, and glucagon is in the bloodstream.

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Answer:

Group 6a, period 4

Explanation:

Refer to image

Answer:

220.9g of water are required

Explanation:

The molar enthalpy of vaporization is defined as the heat released when 1 mole of water changes from liquid to gas.

For water, 1 mole releases 40.79kJ. To release 500kJ are necessaries:

500kJ * (1mol / 40.79kJ) = 12.26 moles are necessaries

To convert moles to grams we must use the molar mass (H2O = 18.02g/mol):

12.26 moles * (18.02g / 1 mol) =

The amount of 95% ethyl alcohol required depends on the data.

To determine the amount of 95% ethyl alcohol needed to dissolve 0.3 g of sulfanilamide at 78°C, it is necessary to refer to the data from Technique 11, Figure 11.2.

This graph provides information about the solubility of sulfanilamide in relation to the concentration of the solvent, which is 95% ethyl alcohol. By analyzing the graph, the concentration of sulfanilamide at 78°C can be determined.

Then, based on the desired solute concentration, the corresponding concentration of the solvent can be identified. This concentration can be used to calculate the amount of 95% ethyl alcohol required to dissolve the given mass of sulfanilamide.

By utilizing the data from the graph, the appropriate quantity of solvent can be determined to ensure successful dissolution of the sulfanilamide.

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The correct answer is C. the reaction temperature will be maintained at approximately 100°C.

When a reaction mixture is heated at reflux, the temperature of the mixture will be maintained at the boiling point of the solvent.Reflux is a process that involves condensing vapours and transferring the resulting condensate back to the system it originally came from. It is employed in both commercial and academic distillations. Moreover, it is employed in chemistry to provide long-lasting reactions with energy. For example, if the reaction mixture is heated with water, the temperature will be kept at 100°C. Therefore, when heating a reaction mixture at reflux, the reaction temperature will be maintained at approximately 100°C.

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Answer:

55,000,000

Explanation:

550 hectometers [hm] = 55,000,000 millimeters [mm]

If all of the bonding electrons in a molecule are bonded in two-hybrid sp orbitals are likely to have a linear shape.

One of a set of hybrid orbitals is produced when one s orbital and one p orbital is combined mathematically to form two new equivalent, perpendicular orbitals.

A linear molecule is one in which the atoms are arranged in a straight line (less than a 180° angle). The sp hybridization occurs at the central atom of molecules with linear electron-pair geometries.

Carbon dioxide (O=C=O) and beryllium hydride \(BeH_2\) are examples of linear electron pairs and molecular geometry.

Hence, option A is correct.

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Answer:

B) Conduction requires two objects to be in physical contact.

Explanation:

Conduction is when two objects are directly touching each other. So, the objects must come in physical contact with each other.

It appears that you need help with an experiment involving the elements calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), tin (Sn), and zinc (Zn).

Calcium (Ca) is a reactive alkaline earth metal. Copper (Cu) is a ductile and corrosion-resistant transition metal. Iron (Fe) is a strong, magnetic, and abundant transition metal. Magnesium (Mg) is a lightweight reactive alkaline earth metal. Tin (Sn) is a malleable and ductile post-transition metal. Zinc (Zn) is a corrosion-resistant, moderately reactive transition metal. To provide you with an accurate answer, I need more information about the experiment, such as the procedure, purpose, or specific data you are working with. Once you provide that information, I'll be happy to assist you further!

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Answer:

NaCl (common salt) is solid in state and solid ions or compounds don't conduct electricity. It needs to be either melted, molten or dissolved in a solution (i.e. water) first.

Explanation: