Evaluate 4x+13 when x=-3

Answer: because acid and water react in a vigorous exothermic reaction, releasing heat, sometimes boiling the liquid.

Dilute 500 ml of 0.5 m kcl to a final volume of 3.5l resulting molarity is 0.1428

Molarity is the amount of a substance in a certain volume of solution. molarity is also defined as the moles of a solute per liters of a solution. molarity is calculated as M = no of moles of solute/volume of solution in liter

here, kcl is diluted as 0.5m and final volume is 3.5l so,

M = 0.5/3.5 = 0.1428

So molarity is 0.1428

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Molecular formula of a molecule is C₂H₂.

Empirical formula gives the proportion of the elements present in a compound.

The proportion od carbon and hydrogen is 1 : 1.

n(C) : n(Cl) = 1 : 1

n(C) = n(H) = n; amount of substance of carbon and hydrogen is the same in a molecule

M(molecule) = 26 g/mol; molar mass of a molecule

M(C) = 12 g/mol; molar mass of carbon

M(H) = 1 g/mol; molar mass of hydrogen

M(molecule) = n × M(C) + n × M(H)

M(molecule) = n × 12 g/mol + n × 1 g/mol

26 g/mol = n × 13 g/mol

n = n(C) = n(H) = 2

There are 2 atoms of carbon and two atoms of hydrogen in a molecule, so molecular formula is C₂H₂.

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In the biochemistry, Where reactants are normally dissolved in water, The strongest bond or interaction in the water is polar covalent bonds.

Water is a good solvent for polar and ionic compounds. the polarity and hydrogen bonding capability of water makes excellent solvent for polar molecules.In water ionic bonds come apart much more than covalent bonds.

The polarity  of water molecules is what makes a widely good solvent . The positive part of the water molecules attract negative part of solute and negative part of water attract positive part of solute.

Water greatly weaken the electrostatic forces and hydrogen bonding between ionic and polar molecules by competing for their attraction.

Hydrogen bonds are weaker than ionic bond and covalent bonds but stronger than dipole dipole interaction.  

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Most americans overconsume calcium. fiber. added sugars. potassium because in calcium, fiber added sugars, potassium has an healthy and nutrition food and it does't cause diseases.

Adequate intake of calcium is necessary for bone health as well as for basic biological functions such as nerve transmission, vasoconstriction, vasodilation, and muscle contraction. adequate potassium intakes are associated with optimal blood pressure and may reduce the risk of developing kidney stones and bone loss. fiber may protect against cardiovascular disease, obesity, and type 2 diabetes, and it is essential for digestive health. that's why most american's overtake this calcium, fiber added sugars, potassium

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The web's connectivity advantage allows for data and resource sharing that enables communication with a website.

In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that allows us to share We all need to communicate.

In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that can be shared. We all need to communicate. Effective communication results in a sense of satisfaction and accomplishment for all involved. Clearly communicating your message leaves no room for misunderstandings or message changes, and reduces the chance of conflicts.

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Answer:

310

Explanation:

Conevrting 1.9 kilojoule(kJ) into:

a) 1.9 kJ = 450 cal

b) 1.9 kJ = 1900 J

Similar to how kilometers measure distance, a kilojoule is a unit used to measure energy. Some nations continue to utilize the Calories (Cal) system, which was once used to quantify food energy. These are the conversions: 1 kJ = 0.2 Cal.

A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. Calories are necessary for human survival. Without energy, the body's cells would die, the heart and lungs would stop pumping, and the organs wouldn't be able to carry out essential life tasks. Through their consumption of food and liquids, people can absorb this energy.

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The following question follows the law of conservation of mass.

The law of conservation of mass states that in a reaction the mass of the products is equal to the mass of the reactants.

The reaction is :

Pb(NO₃)₂(aq) + K₂CrO₄(aq) → PbCrO₄(s) + 2KNO₃(aq)

the mass of beaker A containing lead nitrate = 128.71g

the mass of beaker B containing potassium chromate = 128.97g

After mixing beaker A and B,

mass of beaker A = 154.10g

mass of beaker B = 103.58g

Thus, according to law of conservation of mass,

mass of reactants =  128.71 + 128.97 = 257.68g

mass of products = 154.10 + 103.58 = 257.68g

hence, mass of products = mass of reactants.

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When a protein of 50 nanometers is mixed with water, the opaque result is called a: suspension.

A suspension is a heterogeneous combination of two or extra substances. In it, the particles are suspended for the duration of the solution in bulk and can be easily viewed by means of bare eyes.

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The density of lead is 11.4 g/cm³. The mass of a lead ball with a radius of 0.50mm is  5.9714226 x 10⁻² g.

The density of a substance is defined as the mass of substance per unit of its volume. Density is represented by the symbol, ρ.

The formula for density is -

 Density (ρ) = mass (m)                    

                       volume (v)

Given :

Density of lead = 11.4 g/cm³

Radius of lead ball = 0.50 mm = 0.05 cm

Since,

         Vsphere = 4/3 π r³

                     v = 4 × 3.14 × (0.05)³

                           3

                     v = 4.18 x (1.25 x 10⁻³)

                     v = 5.225 x 10⁻³  

Since,

           Density =  mass  

                            volume

       11.4 g/cm³ =    mass  

                            5.225 x 10⁻³

              mass = 11.4 x (5.225 x 10⁻³)

              mass = 5.9565 x 10⁻² or 0.05955 g

So,  the mass of a lead ball with a radius of 0.50mm is  5.9565 x 10⁻² g

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Covalent bonds predicted from an atom of Silicon (Si) are Four covalent bonds.

Covalent bonds are generally formed by the non-metals. These bonds are formed when electrons are shared between the atoms. To know the number of covalent bonds in any atom, you must know the number of valence electrons.

Those elements which belong to the period 2 forms covalent bond as-

                                  8 - number of valence electrons.

Those elements which are from period 3, they form covalent bonds exactly same as the number of valence electrons.This is because d-orbitals are present in the period.

Silicon is the 14th element which belong to period 3. The electronic configuration of 1s² 2s² 2p⁶ 3s² 3p²

Just like Carbon (C), Silicon (Si) is tetravalent in nature, which means that it can easily share all four of its valence electrons and form covalent bonds. To become stable, Silicon(Si) will form four covalent bonds.

Silicon has four valence electrons, so it will form four covalent bonds.

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Answer:

H2S

Explanation:

The gas with the smallest molar mass diffuses the fastest (assuming that the holes are the same size and that gasses act ideally).
Find the molar mass of each of the gasses, and then compare.
CO2 = 12 + 16 + 16 = 32 + 12 = 44
HCl = 35.45 + 1 = 36.45
H2S = 1 + 1 + 32 = 34
NO2 = 14 + 16 + 16 =  32 + 14 = 46
Therefor, H2S diffuses the fastest, then HCl, then CO2, and finally NO2

The substance is a white solid at room temperature is sodium chlorides

Sodium Chloride is essential to maintain the electrolyte balance of fluids in a person's body. it is also known as salt table.

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Acetyl-CoA enters the citric acid cycle by reacting with oxaloacetate to form citrate.

Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.

There are two main types of acids: organic acids and inorganic acids. Inorganic acids are sometimes called mineral acids. As a category, organic acids are often weaker than inorganic acids. The basic difference between the two is that organic acids contain carbon whereas inorganic acids do not. Natural Acids: These acids are found in foods. For example, acetic acid, tartaric acid, and lactic acid. Mineral or Inorganic Acids: These acids are used in various laboratory processes such as hydrochloric acid, and sulfuric acid.

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Yes , the chemist can answer if the compound in K2O or K2O2

The chemical formula and composition of both the compounds is entirely different. The compound K2O2 has an additional molecule of oxygen than K2O and hence will have have higher molecular mass.

In the compound K2O

molecular mass= 2x 39+16 =94

mass ratio of K in compound= 78/94 = 0.830

In the compound K2O2

molecular mass= 2x 39+16X2 =110

mass ratio of K in compound= 78/110 = 0.710

and hence by the required ratio while extracting K , the chemist may know if the compound is K20 or K2O2

If the ratio is anything different from 0.830 and 0.710 then the compund will be something different

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The type polymer would you obtain if sorbitol was used as a plasticizer additive is the  Bio - polymer.

Plasticizers are the substances added to polymer soultion to enhances its flexibility and plasticity. This is the reason plasticizers make polymer solution suitable for the application of film coating.

Bio - polymers are produced from natural sources. Bio based polymer may produced from sugar- based or starch based.

Sorbitol is a naturally occuring sugar alcohol. it is the effective plasticizer for improving melt processing ability.sorbitol is a type of carbohydrate  known as sugar alcohol or polyol. It is found in sugar free gum used as a plasticizers and reduce the hydrogen bonding of polymer and incorporate spaces into the polymer.

so, when sorbitol used as plasticizer additive the type of polymer formed is bio - polymer.

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The houses of compounds are one-of-a-kind and in a few instances very one-of-a-kind, from the ones of the factors that compose them. This is because Elements combine compounds to grow to be absolutely one-of-a-kind materials with specific houses.

Elements combine may be chemically blended into compounds, therefore, a compound includes extra factors blended, in exact proportions, with the aid of using chemical means. Compounds can be shaped with the aid of using combining atoms in their constituent factors with the aid of using ionic bonds or with the aid of using covalent bonds.

An Elements compound is a completely unique substance that paperwork while or extra factors integrate chemically. A compound usually includes the identical factors withinside the identical ratio. If the identical factors integrate into one-of-a-kind ratios, they shape one-of-a-kind compounds. Types of compounds encompass covalent and ionic compounds.

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Ramelteon is a hypnotic agent used in the treatment of insomnia. The molecular formula of this compound is C16H21NO2.

The molecular formula is the number of elements that are present in a compound. The molecular formula is calculated in terms of the empirical formula since the empirical formula is just the same or a multiple of the molecular formula.

The formula is :

              n=M/mass of the empirical formula

Where,

M is the molar mass and n is an integer.

For example, the molecular formula of Caffeine C8H10N4O2 and its empirical formula is C4H5N2O.

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Approximately, 21 kJ was released from the combustion of the 1-g sample.

Because heat is a type of energy, the SI unit for heat is also joules (J), which is defined as the quantity of energy required to increase the temperature of a given mass by one degree. This is significant because heat is a form of energy. Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred. The joule is the S.I. unit for heat.

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The lewis structure for these anions are-

a fairly straightforward manner to visualize a molecule's valence shell electrons is through a Lewis structure. It gives insight into the pairing and association of the electrons surrounding every atom in the molecule.

every electron inside the Lewis dot structure can be represented via a dot, and a line connecting the dots is drawn to shape an electron bond.

simplest the valence electrons are taken under consideration whilst sketching the Lewis dot shape, ignoring the electrons that don't belong to the outermost shell.

The Lewis shape is the most effective and maximum constrained speculation; it does no longer describe how bonds are created or how electrons are disbursed most of the atoms. And that is visible as the essential constraint at the Lewis shape.

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Answer:

An atom is the smallest particle of an element and is the building block of all matter.

Cocoa butter occupies the greatest volume.

What is cocoa butter good for?

Vitamin E has several health advantages for the body, and cocoa butter is a good source of this vitamin. The health of your blood, brain, skin, and reproductive system are all supported by vitamin E. Due to its high fatty acid content, cocoa butter is an excellent choice as the main component of skin creams.

Cocoa butter is 9/0 it's close to ICL but cocoa butter is the smallest end this one will take off the most volume because it is divided by the smaller density.It is important not to overheat the Baker when drying the sodium chloride because by these comments won't be loss and Baker was properly heat.

Complete question -

If you had equal masses of each of the following substances, which would occupy the greatest volume?a. ice (d = 0.917 g/mL)d. cocoa butter (d = 0.910 g/mL)b. water (d = 0.997 g/mL)e. aluminum (d = 2.70 g/mL)c. beeswax (d = 0.960 g/mL)

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When placed in a magnetic field, a current-carrying conductor experiences a mechanical force that can cause the conductor to move.

How does the magnetic field impact current?

Current and magnetic force are directly inversely connected in a homogeneous magnetic field for a straight current-carrying wire. As a result, the force is inversely related to the size of the current. This translates to: If the current is doubled, the force on the conductor will also double.

Electric fields are created by differential voltages; the stronger the voltage, the stronger the resulting field. Magnetic fields are produced by electric current, and the stronger the current, the stronger the magnetic field. There will always be an electric field present even when there is no current flowing.

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Answer:soluble

Explanation: bc its less then NaOh