The formula weight of ammonium sulfate ((nh4)2so4), rounded to the nearest integer, is ________ amu.
a. 264
b. 132
c. 118
d. 100
e. 116

A hydrate of cobalt(II) chloride had a mass of 238.0 g before heating. After heating, the anhydrous CoC1, weighed 130.7 g.

from above statement, we found that,

before heating cobalt(II) chloride  = 238.0g

Mass of hydrated  cobalt(II) chloride After heating = 130.7 g

Mass of water = (1238.0 - 130.7) g = 107.39g

moles H2O  = 107.39× 1 mole H2O÷18g H2O

= 5.96 mol H2O.

moles of anhydrous CoCl, remain = given mass of CoCl÷ molar mass of CoCl

=130÷94.5

= 1.375 mole

moles of CoCl₂ = given mass of  CoCl₂÷ molar mass of CoCl₂

= 130÷ 130

= 1 mole.

hydration number = moles of water÷ mole of compound

= 5.96 mol÷ 1

 = 5.96 hydration number

To know more about  cobalt(II) chloride visit : https://brainly.com/question/10658793

#SPJ9

Answer:

Same amount of liquid and take up same amount of liquid but they are in different containers

Explanation:

To make (H₃C)₃C-O-CH₃ using the Williamson ether synthesis is

        H₃C-OH + Na⁺   →    (H₃C)₃C-Br⁻  →  (H₃C)₃C-O-CH₃

The general method for synthesis of ether is Williamson ether synthesis, as it involves nucleophilic displacement of a halide or any other group by an alkoxide ion.

It takes place as am SN2 reaction of primary alkyl halide with an alkoxide ion.

The basic mechanism of reaction is:

                     R--O⁻  + R'--X  -------→  R----O----R'       X⁻

The Williamson ether synthesis consists of two separate reactions; preparation of alkoxide and its reaction with alkyl halide.

To learn more about Williamson ether synthesis,

https://brainly.com/question/2622808

#SPJ4

The 12-hour time of contact between alginate and therefore the plaster cast is not recommended because it influences the quality of the plaster cast

Gypsum may be a resource that is found by doing a variety of activities. Gypsum are often crafted into Gypsum Orbs, which may then be turned into special caches is called Gypsum Casts. Gypsum Casts are gear type specific, and when opened, guarantee an Expertise bump for that sort of gear as well as an item of that type.

Gypsum products are one among the most broadly utilized dental materials for fabrication of dental casts and dies which are used as for further construction of indirect dental restorations

Learn more about gypsum cast:

brainly.com/question/10717099

#SPJ4

The hybridization of O in ozone molecule [tex]O_3[/tex] is [tex]sp^{2}[/tex]

The bond angle of ozone is 117.5° which is close to 120° , thus it show trigonal planar geometry and is [tex]sp^{2}[/tex] hybridized.

Bonding of oxygen in ozone can be stated as

Three sets of [tex]sp^{2}[/tex]  hybrid orbital overlap to produce two [tex]O-O[/tex] σ bonds and five lone pair of electrons , two on both side oxygen atom and one pair on central atom.

The π bonding is formed by unhybridized [tex]2p_z[/tex] orbital on every oxygen atom . This π bonding is delocalized over all three oxygen atoms of ozone molecule.

To know more about ozone molecule

https://brainly.com/question/25180993

#SPJ4

There are actually two models of electromagnetic radiation. One is the wave model, of course, and the other is the particle model, which postulates that radiation is made up of a stream of discretely sized particles called light quanta.

Different ideas about the energy connected to radiation are produced by the two theories.

The energy is stored in the EM fields that are moving through a region when the radiation is thought of in the wave model as an EM wave.

The wave oscillations in the wave model hold the energy.

Conceptually, the particle model differs slightly. Since each discrete particle in radiation has a specific amount of energy, the total energy of the radiant beam is determined by the number of discrete particles that make up the radiation.

In this scenario, the energy of each quantum is denoted by the formula E = h v, where h is Planck's constant.

Learn more about electromagnetic waves here:

https://brainly.com/question/11820725

#SPJ9

Explanation:

The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.

In secondary structure of a protein, other than peptide bonds, hydrogen bond are formed.

The secondary structure contains regions of amino acid chains that are stabilized by hydrogen bonds from the polypeptide backbone. arrangement of hydrogen bonds between the peptide it is an arrangement nitrogen's and the peptide carbonyl oxygens of different amino acid residues. the most common types of secondary structures are the α helix and the β pleated sheet. both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.

Know more about secondary structure of a protein

https://brainly.com/question/28500178

#SPJ4

1) Many important materials are noncrystalline, such as liquids and gases. Water and air have noncrystalline structures. When a metal is melted, its crystalline structure is lost.

2) Mechanical properties such as high strength are desirable for design, but they make manufacturing more difficult. As a result, design properties disadvantage manufacturing properties and vice versa.

Non-crystalline solids, on the other hand, allow particles to move more freely because they are not as rigidly arranged as other solids. These solids form when a liquid is suddenly cooled. Plastic and glass are two of the most common examples.

As a result, they are referred to as "pseudo solids." Crystalline solids have less energy than non-crystalline solids. Solids are classified into two types: crystalline solids and non-crystalline solids.

Learn more about crystalline solids here:-

https://brainly.com/question/12759602

#SPJ4

Answer:

when molecules loose or gain electro it get charge and when it get attached with other charge molecules the form bond

ans is loose or gain ,bond

Hydrogen bonds occur between neighboring amino acids in a secondary structure in creating alpha helices and beta pleats.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

Protein is composed of amino acid linked with peptide bond, secundary structure can be α-helices and beta pleated sheet.

In a beta-pleated sheet, hydrogen bonds are formed between carbonyl and amino groups of backbone.

Fluorine atom has greater electronegativity than oxygen atom in carbony group, so the hydrogen bond with hydrogen atom is shorter and strands are closer.

More about beta-sheet: brainly.com/question/5297569

#SPJ4

Electrons ruminate around the nucleus in particular circular path known as orbit called shell.

Electronic configuration is the dispense of electrons.

Electronic configuration is also known as electronic structure.

Also termed as spatial methodize.

More than one orbital in the electron shell is known as subshell, they have similar energy level.

In Electronic configuration there are four shell present namely k,l,m,n and there are 4 sub-shell namely s,p,d,f.

As we know that every subshell fills gradually s max 2 electrons p - 6 , d - 10 and f - 14.

So,

According to questions,

Thge element has configuration 1s2 2s2 2p4 hence 8 electrons.

To know more about Electronic Configuration here :

https://brainly.com/question/14283892?referrer=searchResults

#SPJ4

By ideal gas approximation, the final pressure is 2.14 atm.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

V1 = 12.5 L

V2 = 29.3 L

P1 = 5.01 atm

When the initial and final temperature is the same, we can use the ratio of pressure and volume as

P1 . V1 = P2 . V2

5.01 . 12.5 = P2 . 29.3

P2 = 2.14 atm

Find more on ideal gas at: https://brainly.com/question/25290815

#SPJ4

The formula for glucose is C₆H₁₂O₆. by multiplying the molecular no of 1 glucose molecule by 3 we get 18 carbon and 36 hydrogen and 18 oxygen molecule. i.e. C₁₈H₃₆O₁₈

Elaborate:

It features a molecular formula of C ₆ H ₁₂ O ₆ When HI is heated for a long time, n-hexane is formed which indicates that all the six carbon atoms are linked in a straight chain.

The oxime is formed when glucose reacts with hydroxylamine and cyanohydrins with the addition of hydrogen cyanide to it.

What is a molecular formula?

The formula is the formula showing the actual number of each atom in a molecule.

How may be a molecular formula written?

A formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. An formula gives the simplest, whole-number ratio of atoms during a compound. A molecular formula indicates the bonding arrangement of the atoms in the molecule.

Learn more about molecular formula:

brainly.com/question/15960587

#SPJ4

Disulfide bond forms when the sulfur atoms in two adjacent protein chains are joined together.

When the sulfur atoms in two adjacent protein chains come together, strong chemical side bonds form. Weak physical side bonds are caused by the attraction of opposite electrical charges. Polypeptide chains that are coiled. Chemical bonds that connect amino acids end to end in long chains.

These peptide subunits can form complex structures by bonding with other peptides. Chemical bonds of various types hold proteins together and bind them to other molecules. Examine the chemical bonds that are responsible for protein structure. A protein's primary structure is made up of amino acids linked together in a chain.

Learn more about amino acids here:-

https://brainly.com/question/25188678

#SPJ4

About a century ago, in 1911, Rutherford discovered the atomic nucleus, then in 1919, he witnessed the proton.

For a long time, people believed that Atom was the final particle and the building block of every other component in the universe. However, in the year 1911, Rutherford's atomic model depicting the presence of nucleus shattered the argument that atom is the ultimate unbreakable particle.

Rutherford's experiment also approved that there must be more than just protons in the nucleus. For example, it was previously known that helium had an atomic number of 2, but a mass number of 4.

To know more about nucleus, refer to brainly.com/question/12602839

#SPJ4

The compound would be most easily formulated as an aqueous solution used to quickly provide energy to an athlete is carbohydrate.

carbohydrate strategy is used for athletes to maximize the storage of energy , in form of glycogen, in muscles. simple carbohydrates are simple sugar such as fructose and glucose.Every athletes anywhere should consume 3 - 12 gm per kilo weight throughout the day, depending on their training routine.

Carbohydrates provide energy for the body including muscles , brain, nerves and other tissues present in body.thus, carbohydrates acts  a master fuel in body.

carbohydrates are used for energy (glucose). athlete drinks contain carbohydrates ans electrolytes.

To learn more about carbohydrates here

https://brainly.com/question/14614055                                                                

#SPJ4    

A central theme in chemistry is that we study Observable changes in matter to understand their Unobservable causes.

Matter is a substance made up of a variety of sorts of particles that occupies physical house and has inertia. According to the standards of current physics, the a variety of sorts of particles every have a particular mass and size. The most acquainted examples of fabric particles are the electron, the proton and the neutron.

Learn more about Matter here:

https://brainly.com/question/4513444

#SPJ4

The hydrogens and oxygen of a water molecule are held together by covalent bonds.

A covalent bond is an electron exchange that causes the production of electron pairs between atoms. Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons.

Bonding pairs or sharing pairs are other names for these electron pairs. Because electrons are shared among several molecules, each atom can reach the equivalent of a full valence shell, resulting in a stable electronic state.

In organic chemistry, covalent bonds are much more common than ionic bonds. Covalent bonds unite the atoms in a single water molecule, whereas hydrogen bonds join two water molecules. Water develops a covalent bond when oxygen shares an electron with each hydrogen atom.

To know more about covalent bonds, refer:

https://brainly.com/question/3447218

#SPJ4

SO2 has a larger dipole moment than SO3 molecule in each pair has the greater dipole moment

Dipole moment (μ) measures the net molecular polarity, which is the product of charge Q and the distance r between the charges μ=Q×r thus, the larger the difference in electronegativities of bonded atoms, the larger the dipole moment. the SO3 molecule has zero dipole moment SO3 (sulfur trioxide) molecule has the highly symmetrical trigonal planar geometry and each one of the individual S-O bond in the species is equally polar. trigonal planar with each O double bonded to S. so no dipole moment inSO3.

Know more about dipole moment

https://brainly.com/question/28498666

#SPJ4

Spontaneous movement of molecules and ions from an area of high concentration to an area of low concentration is true.

There are two examples of spontaneous movement: diffusion and osmosis.

Diffusion is spontaneous movement of molecules and ions from an area of high concentration to an area of low concentration.

Osmosis is the spontaneous movement of solvent molecules (in this example water) through a selectively permeable membrane into a region of higher solute concentration (15 percent salt solution), in the direction that tends to equalize the solute concentrations on the two sides.

The direction of osmotic pressure is always from the side with the lower concentration of solute to the side with the higher concentration.

More about diffusion: brainly.com/question/7161064

#SPJ4

Bile suspends lipids in the watery chyme in the small intestine so that lipids can be more easily digested by lipase enzymes.

Enzymes are proteins that accelerate metabolism and chemical reactions in the body. Build some substances and break down others. All living things have enzymes. Our bodies naturally produce enzymes. However, enzymes are also found in finished products and foods.

According to the International Union of Biochemists (I U B), enzymes are divided into six functional classes, classified according to the types of reactions used to catalyze them. The six enzymes are hydrolases, oxidoreductases, lyases, transferases, ligases, and isomerases.

Learn more about   enzymes here

https://brainly.com/question/14577353

#SPJ4

The fraction of 12c in the sample is 60% or 0.6

Isotopes are two or more different atom types that share the same atomic number and are placed in the periodic table but have different quantities of neutrons in their nuclei, resulting in various nucleon numbers. Or, any of two or more types of atoms of a chemical element that have the same atomic number and essentially the same chemical behavior, but have distinct atomic masses or mass numbers and different physical properties. Isotopes are atoms that are part of the same element and have the same atomic number Z but a different mass number A. For instance, three isotopes of the element carbon, with respective masses of 12, 13, and 14, are carbon-12, carbon-13, and carbon-14.

To learn more about Isotopes, visit:

https://brainly.com/question/27475737

#SPJ4

The volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.

In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.

According to the question,

The density of iron chloride solution = 1.118 g/mL.

The mass of iron chloride solution = 1.75 kg.= 1750 g.

The formula for calculating the density is as follows:

Volume = 1750 g/1.118g/mL = 1565.29 mL.

Therefore, the volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.

To learn more about Density, refer to the link:

https://brainly.com/question/1354972

#SPJ1

The electrons are more closely linked the closer they are to the nucleus, enhancing the atom's electronegativity.

The ability of an atom to polarise electron density in its own direction is measured by electronegativity. As a result, it is USUALLY a function of the nuclear charge's symbol, atomic number Z. The most electronegative elements are fluorine and oxygen, which are located to the right of the Periodic Table.

These elements have smaller atomic radii and greater electronegativity due to their higher atomic numbers. The distribution of electrons around an atom's nucleus determines its size, so it makes sense that there would be a link between electronegativity and radius. The electrons are more closely linked the closer they are to the nucleus, enhancing the atom's electronegativity.

To learn more about electronegativity please visit-
https://brainly.com/question/17762711
#SPJ9

Earth is made mostly of metals and rocks.  the elements (carbon, silicon, iron, etc.) that make up these materials form, and they were produced by nuclear fusion in stars.

Metals are materials that, when freshly worked, polished, or crushed, have a lustrous appearance and are relatively good conductors of electricity and heat. Metals are typically ductile and malleable. These properties are the result of metallic bonding between the atoms or molecules of the metal.

Metal is very useful material. Metals have many properties such as B. Strength, toughness, and stiffness. When heated, the metal can be shaped into anything from tiny paper clips to giant airplanes. It is also an excellent conductor of electricity and heat, making it useful for electricity and cooking pots.

Learn more about   metals here

https://brainly.com/question/25597694

#SPJ4

High temperature: 58 °F

Low Temperature: 43 °F

50 °F is the average temperature.

Precipitation: 3.12"

79% humidity

44 °F Dew Point

Wind speed: 9 mph

29.96 mmHg pressure "Hg

12-mile visibility

Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. It is the largest of the British Isles, the largest European island, and the ninth-largest island in the world, with a total area of 209,331 km (80,823 sq mi). It is characterized by a maritime climate with a narrow temperature range.

Northern Bay has about 290 permanent residents and is located on Route 70 between the neighboring communities of Gull Island and Ochre Pit Cove. It stretches from the "south side" of Northern Bay, where the beach is, to what was once known as the "Lower Rooms."

Learn more about the island here:-

https://brainly.com/question/11920269

#SPJ4

Rocks are wedged apart by plant roots that grow through fissures in quest of water and minerals. Additionally, some fungus, lichens, and plants create acids and other substances that help the chemical weathering of earth minerals. Root systems restrain by adhering to and stabilizing rocks and soils.

How do plants promote mechanical and chemical weathering?

Chemical and mechanical weathering can be brought on by plants. Plants' roots penetrate rocks and cause them to fracture as a result of mechanical weathering. It may also occur on sidewalks or in streets. Plants produce chemical weathering by releasing acids or other chemicals through their roots onto rocks, causing the rocks to fracture and develop fissures.Chemical weathering is also brought on by animals and plants. Plant roots draw components from the minerals as they absorb nutrition. The rock undergoes a chemical alteration as a result.

To learn more about Chemical and mechanical weathering from given link:

https://brainly.com/question/1130406

#SPJ4