What is hard water in chemistry

Answers

Answer 1
In chemistry, hard water is the water that has minerals like magnesium and calcium naturally present. Hard water has high mineral content, it produces no foam and lather when used with soap, used as drinking water. If suddenly used, it causes hair and skin to turn dry. It is found in groundwater like deep wells.

Related Questions

when the temperature of a 3.0-l sample of a gas is dropped from 200°c to 100°c, what will be the final volume of the gas sample?

Answers

If a 3.0 L sample of the a gas is heated to 200°C and then cooled to 100°C, the gas's final volume is 2.4 L.

Which volume is the first?

The initial distribution volume (Vi) is just a pharmacological term that describes how quickly after or intravenous dosing and before the drug reaches steady state equilibrium, a drug is distributed throughout the body.

Given, Initial Volume of the sample = 3L

Initial temperature of the sample, T₁ = 200° C

                                                       = 200 + 273

                                                       = 473 K

Final temperature of the sample, T₂ = 100° C

                                                          = 100 + 273

                                                           = 373 K

By Gay-Lussac's Law is a variant of the general gas equation,

From the above relation,

Substituting values,

= (3x 373) / 473

  = 1119/473

  = 2.4L

What does Boyle's law mean by volume?

Boyle's law can be expressed mathematically as pV=k, where p is the gas's pressure, V is its volume, and k is a constant. A balloon serves as an illustration of Boyle's rule in action. The balloon is inflated with air, and as the air pressure presses on the rubber, the balloon expands.

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Which of the following solutions do they have the maximum osmotic pressure and why?
1) 0.1 m ( molal conc.) glucose
2) 0.1 m sucrose
3) 0.5 m glucose
4) 0.2 m sucrose

Answers

Since NaCl produces the most ions, it will exhibit the highest osmotic pressure.

Osmotic pressure: What is it?

The osmotic pressure is the least amount of pressure that must be given to a solution in order to block the passage of the solution's pure solvent through a semipermeable membrane.

How is osmotic pressure determined?

Temperature and concentration both have an impact on osmotic pressure. Temperature and solute concentration both have an impact on how much pressure is generated when water moves through a membrane. Osmotic pressure rises with temperature and concentration.

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i.) Draw the lewis structure for [CH2NH2]+ ii.) Draw all the resonance structures iii.) Determine the major contributor

Answers

Resonance happens when there is a single pair or numerous bonds with a positive and negative charge. Only two structures formed in this instance, with the second structure being more stable than the first.

When another object's vibrations match those of an object, resonance happens, amplifying the oscillations of the first object. In physics, resonance is described as follows: a phenomena when a vibrating system or external force causes another system nearby to vibrate more intensely at a particular operating frequency Lone pairs, also known as unshared pairs or non-bonding pairs, are valence electron pairs in chemistry that are not shared with another atom in a covalent connection.

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ow do you draw a Lewis Structure for SiCl_2Br_2?

Answers

Lewis Structure for SiCl₂Br₂

What is a Lewis structure?

A Lewis Structure is a greatly condensed illustration of a molecule's valence shell electrons. It is used to display how the electrons are positioned around particular molecules' atoms. When two atoms are bonded together, electrons are depicted as "dots" or as a line. The octet rule and formal charges must be satisfied if the "optimal" electron configuration is to be achieved.

why is Lewis structure important?

When used in conjunction with hybrid orbitals, Lewis structures can also be helpful in predicting molecular geometry.

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if the planet in question is the earth, at what temperature does the average translational kinetic energy of a nitrogen molecule (molar mass 28.0 g/mol ) equal that required to escape? use the radius of the earth is rp

Answers

If a planet is the earth, a nitrogen molecule's average translational kinetic energy, equivalent to the energy needed to escape, is 1.402*105K.  

Nitrogen gas makes up about 80% of the Earth's atmosphere. An perfect gas's molecules have an average translational kinetic energy of 641. 7 × 10 − 23 J. the average translational kinetic energy of a molecule at 1000 K, where the vapours act optimally. Due to atomic nitrogen molecule's have high level of reactivity, elemental nitrogen typically exists as the molecular N 2, dinitrogen. Nitrogen is the seventh element on the periodic table between carbon and oxygen. It plays a significant role in amino acids. Nitrogen gas makes up about 80% of the Earth's atmosphere.

Conversions of kinetic energy

3/2*K*T = 1/2*m*V^2

T = 2*Mg*Rp/3NaK

T = 2*28*10^-3*9.8*6371*1000/3*8.31

T = 1.402*10^5k

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which statement is true about coordination compounds? group of answer choices the metal ion donates a pair of electrons to the ligand. the metal ion acts as a lewis base. co2 is a coordination compound. the sharing of the electrons donated by the ligand forms a coordinate covalent bond to the metal. metal oxide salts are coordination compounds.

Answers

Option 3; The sharing of the electrons donated by the ligand forms a coordinate covalent bond to the metal

Two atoms share one or more pairs of electrons in a covalent bond. The two atomic nuclei are simultaneously attracting these electrons. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to form ions, a covalent bond is created. Bonding electrons are collectively referred to as the electrons that are present in the region between the two nuclei. The hydrogen molecule is the simplest substance with a covalent connection. The linked pair is the "glue" that keeps the atoms in molecular units. Two hydrogen atoms with one electron in each's 1s orbital are the building blocks of the compound. The two electrons in the covalent link are shared by both hydrogen atoms, and each one gains an electron configuration like that of helium.

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The energy that an object has due to its motion is called, a. gravitational potential energy. b. elastic potential energy. c. kinetic energy. d. thermal energy.

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Kinetic energy is the form of energy that a moving body possesses. When kinetic energy is released into motion by gravity or any other force, potential energy is converted into kinetic energy.

Energy is omnipresent. However, we are aware that energy cannot be created or destroyed according to the rule of conservation of energy. However, we are aware that energy can only be transformed from one type of energy to another.

Energy is the definition of the ability to perform work of any kind. Mass and energy are inversely related. This is apparent from the Mass-Energy Equivalence.

E=mc2

It's stated that a body at rest has potential energy. In contrast, when an object is moving, it possesses kinetic energy.

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if 8.00 g of pentane is mixed with 10.0 g of oxygen, which is the limiting reactant? (hint: compare it to either of the products).

Answers

Pentane is the limiting reactant.

C5H12 (l) + 8O2 → 5Co2 (g) + 6H2O (g)

1mol. of C5H12. reacts with. 8mol of O2

Molar mass of C5H12 = 8 g/mol

Molar mass of O2 = 10g/mol

8 g of C5H12 reacts with 8 × 32 = 256 g of O2

10 g of C5H12 reacts with 256 × 10/8 = 320 g of O2

Limiting  reagent is the substance which is not consumed when the chemical reaction is complete.

Pentane is the limiting reactant.

The first liquid among the alkanes, pentane is a colorless, flammable liquid that is lighter than water. At 900 ppm, it can be smelled, and at 5000 ppm, there is a substantial amount of odour strength. There are two other isomers that it can take, namely isopentane [(CH3)2CHCH2CH3] and neopentane [C(CH3)4]. It appears that straight-chain pentane and isopentane (2-methylbutane) have similar physical and physiological properties. In terms of its physical and physiological properties, neopentane (2,2-dimethylpropane) is comparable to butane. C5 pentane in air is equivalent to 3 mg m3 per part per million. A naturally occurring component of the main paraffin portion of crude oil and also present in natural gas, pentane is a five-carbon aliphatic molecule.

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the henderson-hasselbach equation may be used to calculate the ph at any point in a titration. group of answer choices false true

Answers

True, The following problem illustrates how the Henderson-Hasselbalch equation can be used to determine how much acid and conjugate base should be combined to create a buffer solution with a specific pH.

Using M = mol/L, we can calculate the moles of acetic acid, giving us mol = ML = (2M) * (0.5L) = 1mol acetic acid. When the concentration of the conjugate base (acetate) equals the concentration of acid, as shown by the Hendersen-Hasselbach equation, the pH equals the pKa. The Henderson-Hasselbalch Equation is employed to determine a solution's pH. For many chemical reactions as well as for biological systems, knowing the pH of a solution is crucial. The estimated pH value of a buffer solution can be determined using the Henderson-Hasselbalch equation. The following problem illustrates how the Henderson-Hasselbalch equation can be used to determine how much acid and conjugate base should be combined to create a buffer solution with a specific pH. The Henderson-Hasselbalch equation explains the link between the acid dissociation constant (pKa), a measure of acidity, and pH in biological and chemical systems. The equation is particularly helpful for determining the equilibrium pH in acid-base processes and predicting the pH of buffer solution.

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What does VSEPR stand for?

Answers

VSEPR stands for Valence Shell Electron Pair Repulsion Theory.

\What is VSEPR theory?

Gillespie summarizes the rules of VSEPR theory as follows:

A non-binding domain is larger than a single binding domain. They are more widely distributed than single binding domains and occupy more space in the valence shell. This makes sense, because lonely couples are only affected by one positive core, not two.The size of the single bond domain in the valence shell of the central atom decreases with increasing electronegativity of the ligand.Although it is often convenient to think of double and triple bonds as consisting of one σ or two π bonds, respectively, or two or three curved single bonds, the electron pair domain model Now it's easier to think of the double bond as: Two-electron-pair domains and triple bonds as three-electron-pair domains in which individual electron pairs are indistinguishable. These binding domains increase in size from single to double to triple bonds.

Therefore, VSEPR stands for Valence Shell Electron Pair Repulsion Theory.

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in the upper atmosphere, ozone (o3) gas absorbs ultraviolet radiation forming dioxygen (o2), which then reacts with transient atomic oxygen to reform ozone. this equilibrium reaction, which protects the inhabitants of earth from a constant barrage of high-energy and ionizing ultraviolet radiation, can essentially written as:

Answers

The ozone in the atmosphere significantly absorbs solar ultraviolet light, notably the dangerous, high-energy UV-a and UV-b rays.

How is UV radiation absorbed by the ozone layer?

Ozone is created when atomic oxygen (O) recombines with molecular oxygen (O3). The UVB band's short wavelengths are absorbed by ozone, which prevents organic molecule photochemical reactions. Ozone is broken down into molecular oxygen by reactive chlorine (Cl) generated from CFCs, which does not absorb UVB rays.

What processes are involved in the stratospheric ozone layer destruction?

Cl + O3 and ClO + O are the two fundamental reactions that make up the cycle. Overall, Cycle 1 produces two oxygen molecules from one ozone molecule and one oxygen atom.

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1. Metal sulfates are hygroscopic and will absorb water from the atmosphere. As a result, they must be kept in desiccators to keep them dry. Suppose, hypothetically, that the unknown metal sulfate was not desiccated. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 2. In this experiment, an excess of the BaCl2 solution was added to the metal sulfate solution. Suppose, hypothetically, that an excess of the BaCl2 solution was not used. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 3. The last step of the procedure involved vigorously heating the BaSO4 precipitate and filter paper in the crucible. Suppose, hypothetically, that tiny pieces of the filter paper still remained mixed in with the BaSO4 after heating. Would this error lead you to obtain a higher mass % of sulfate or a lower mass % of sulfate in the unknown? Explain. 4.An unknown metal sulfate is analyzed and determined to be 72.07% sulfate by mass. Assuming that the charge on the metal cation is +3, determine the identity of this metal cation.

Answers

Actual amount of sulfates show lower mass percentage of sulfate and less amount of BaSO4 will be formed and if tiny pieces of filter paper remains in the BaSO4 leading to less mass % of sulfates.

When metal sulfates are hygroscopic and will absorb water from the atmosphere as a result they must be kept in desiccators to keep them dry. the unknown metal sulfate was not desiccated. If the sulfate not desiccated the total weight will be higher for a sulfate . So actual amount sulfate will show lower mass % of sulfate. if excess of BaCl2 is not used, it would lead to lower mass % of sulfate as BaCl​2 will be the limiting reagent so less amount of BaSO4 will be formed. if tiny pieces of filter paper remains in the BaSO4 residue it will so higher mass altogether leading to less mass % of sulfates.

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an element of atomic number 88 decays radioactively to an element of atomic number 82.

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Three alpha particles are emitted when radium-88 decay into an element having atomic number 82.

The element with an atomic number 88 is Radium i.e., a radioactive element. The decay from atomic number 88 to atomic number 82 involves a loss of 6 protons.

For losing 6 protons, three alpha particles are used as one alpha particle has two protons which mean that decay via three alpha particles will result in the loss of 6 protons.

Thus, six protons are lost when radium-88 decay into an element with atomic number 82.

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pof3 lewis structure

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The shape of POF3 Lewis structure is tetrahedral.

Each atom is represented by its chemical symbol in Lewis structures, along with its location within the molecule. Atoms connected by bonds are separated by lines (pairs of dots can be used instead of lines). In addition to the atoms, extra electrons that form lone pairs are shown as pairs of dots.

Hydrogen (H) can only form bonds in which two electrons are shared, whereas main group elements of the second period and beyond often react by gaining, losing, or sharing electrons until they have reached a valence shell electron configuration with a full octet of  electrons.

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how is the bond between two atoms discussed in this section similar to a spring between two students?

Answers

Answer:

The spring between two students means that your are connected to each other and friends don't lie.

Explanation:

CHEMISTRY 50 POINTSS!!

The electron configuration of an element is shown below.

1s2 2s2 2p6 3s2 3p6

Name the group this element belongs to in the periodic table and explain your answer.

Based on the electron configuration, write one chemical property of this element.

Answers

Answer: Group 18, non-reactive noble gas

Explanation:

This electron configuration denotes the elements Argon. It is at the end of the 3p subshell and we can tell this because it says 6 for the value in 3p. This element is in group 18 and something important about that group is that they are typically non-reactive gases, because they have a full electron shell.

Group 18

non-reactive noble gas

write the equilibrium constant expression for this reaction

Answers

The equilibrium constant expression for a reaction is written as K = [products]/[reactants], where:

[products][reactants]

Represent the concentrations of the products and reactants, respectively.

How to write the equilibrium constant expression for a reaction:

The equilibrium constant expression is a mathematical expression that is used to calculate the equilibrium position of a reaction.

It is written as K = [products]/[reactants]

Where [products] and [reactants] represent the concentrations of the products and reactants, respectively.

This equation can be used to determine the equilibrium position of a reaction and is an important tool in studying chemical equilibrium. By solving the equilibrium constant expression, the concentration of each product and reactants at equilibrium can be determined.

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8. (a) if 10 % of a light beam is transmitted through a solution of dye when the path length is 1 cm, what is the absorbance? (b) if the same solution is now placed in a cell with a path length of 10 cm, what fraction will be transmitted? (c) if the dye has a molar decadic extinction coefficient

Answers

(a) The absorbance (A) of the solution is calculated using the Beer-Lambert Law:

A = -log(I/I0)

Where I is the intensity of the light passing through the solution and I0 is the intensity of the light absorbed by the solution.

Given that 10% of the light is transmitted, we can say that I/I0 = 0.1. Plugging this into the Beer-Lambert Law equation, we get:

A = -log(0.1) = 1

(b) The fraction of light transmitted through the solution when the path length is 10 cm can be calculated using the Beer-Lambert Law:

A = -log(I/I0)

I/I0 = 10-A

Where A is the absorbance at the given path length and I0 is the intensity of the light absorbed by the solution.

Since the absorbance at the given path length is 1, we can say that I/I0 = 10-1 = 0.1. Therefore, the fraction of light transmitted through the solution when the path length is 10 cm is 0.1.

(c) The concentration of the dye can be calculated using the molar decadic extinction coefficient (ε):

C = A/(εL)

Where A is the absorbance of the solution, ε is the molar decadic extinction coefficient and L is the path length of the solution.

Given that the absorbance of the solution is 1, the molar decadic extinction coefficient is 100,000, and the path length is 1 cm, we can calculate the concentration of the dye:

C = 1/(100,000 x 1 cm) = 0.00001 M

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a silver (ag) electrode in a solution of agnog is set up on the anode side of a voltaic cell. it's attached to the cathode side by a salt bridge and a voltmeter. which metal must be formed on the cathode side in order to produce a positive voltage? o zn o ai o na o cu o au

Answers

(Au) must be formed on the cathode side in order to produce a positive voltage.

Redox reactions include a change in the oxidation state of both the substrate. When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.

A chemical process called oxidation occurs. As a result of atoms as well as groups of atoms losing electrons, it is described as a process. The addition or loss of oxygen as well as hydrogen in a chemical species would be another method to describe oxidation.

At anode oxidation occur, so Ag in oxidized at anode  

Ag → Ag + 1e                                           E°oxi = -0.80v

Xn⁺ + ne → Xn(s)                                     E°red = x

E°cell = E°oxi + E°red

         = -0.80 + x

So, x > 0.80 v

Here, Positive voltage x > 0.80 v, Which is only positive in case of Au (E°red = + 1.50 v)

So Last option E is the correct one.  

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what reagents are needed to convert (s)-3-methyl-3-phenylpentaoic acid to (s)-3-methyl-3-phenylpetanamine

Answers

1. SOCl2/pyridine

2. NH3

3. LiAlH4

4. H2O

SOCl2/pyridine is added to (S)-3-methyl-3-phenylpentanoic acid first in order to convert it to (5)-3-methyl-3-phenylpentanamine.

The carbonyl carbon is then reduced to an alkane by adding NH3 after which LiAlH4 is added. The mechanism is finished by the addition of water, which causes the product to form.

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which of the following molecules would be polar? group of answer choices sco pcl5 ccl4 bcl3 co2

Answers

Sulfur dioxide (SO2) is polar in nature and the electronegativity difference between sulfur and oxygen atoms makes it a polar molecule.

Why is SO2 a polar covalent?

Sulfur dioxide is the chemical compound with the formula SO2 and it is a toxic gas that is responsible for the odor of burnt matches.

SO2 has a bent shape due to the presence of unbonded electrons on the sulfur and oxygen atoms.

Solid sulfur dioxide is a polar molecular solid because net dipole moment is non zero and constituent particles are molecules and the electronegativity of sulfur is 2.5 and that of oxygen is 3.5.

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Draw Lewis structures and MO diagrams for CN+, CN, and CN-. According to the Lewis model, which species is most stable? According to MO theory, which species is most stable? Do the two theories agree?

Answers

Yes, the two theories agree at a point, according to MO theory CN- is most stable species among these three.

Molecular Orbital (MO Theory) is often utilized to explain the bonding in molecules that Valence Bond Theory is unable to. These are substances that often involve some sort of resonance. A link may be a hybrid, not single or double, according to resonance. Valence bond theory only describes the bonding of single, double, or triple bonds. This section doesn't explain resonance bonding. The Molecular Orbital Theory's Rules:

First rule: When two atoms combine, they always contribute the same number of atomic orbitals, hence the number of molecular orbitals formed is always equal to that.

Second principle: Antibonding molecule orbitals have greater energies than bonding molecular orbitals, which have lower energies than the parent orbitals.

Third principle: The molecule's electrons are assigned to orbitals ranging in energy from the lowest to the highest in turn.

Fourth principle: When the atomic orbitals have similar energies, they can combine to produce molecular orbitals most efficiently.

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16. This Volcano has magma that is[viscous, can have pyroclastic flows
and is composed of layers of ash, lava and rock. What type of volcano is
this?

Answers

Answer: Based on the description provided, it sounds like the volcano in question is a stratovolcano, also known as a composite volcano.

Explanation:

Stratovolcanoes are characterized by having viscous magma that can produce pyroclastic flows (flows of hot ash, gas, and rock) and are made up of layers of ash, lava, and rock. Stratovolcanoes are often cone-shaped and can be quite tall. They are formed through the accumulation of material ejected during eruptions, and they are typically found along plate boundaries where tectonic plates are converging. Some well-known examples of stratovolcanoes include Mount St. Helens, Mount Fuji, and Mount Vesuvius.

help.
a student plans to investigate how different factors affect the rotation rate of a hand-made motor when connected to a battery. The student will test a different variable in each investigation: the voltage of the battery (V), the number of loops used in the wire coil, and the number of magnets used below the loops. The first table shows details and predictions for investigation
How should the student design investigation 3 to finish testing the factors that affect the rotation rate of a motor?

Answers

Answer:

investigation 3 to finish testing the factors that affect the rotation rate of a motor

Explanation:

What type of solid will each of the following substances form? a. diamond e. KCl i. Ar b. PH3 f. quartz j. Cu c. H2 g. NH4NO3 k. C6H12O6 d. Mg h. SF2

Answers

Ionic, molecular, covalent, and metallic solids are the four main categories of solids. Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions.

Molecular solids—Made up of atoms or molecules held together by London dispersion forces, dipole-dipole forces, or hydrogen bonds.

Covalent-network solids—Made up of atoms connected by covalent bonds.

Metallic solids—Made up of metal atoms that are held together by metallic bonds.

(a) Diamond forms covalent net work solid.

(b) PH3 forms molecular solid.

(c) H2 forms molecular solid

(d) Mg forms atomic metallic solid

(e) KCI forms ionic solid

(g) NH overline 1N*O_{2} forms ionic solid

(h) SF2 forms molecular solid

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The type of solid will substances form :

(a) Dimond forms covalent net work solid, (b) PH₃ forms molecular solid, (c) H₂ forms molecular solid, (d) Mg forms atomic metallic solid, (e) KCI forms ionic solid, (f) Quartz forms covalent net work solid, (g) NH₄NO₃ forms ionic solid, (h) SF₂ forms molecular solid, (i) Ar forms atomic solid, (j) Cu forms metallic solid, (k) C₆H₁₂O₆ forms molecular solid.

Solids are classified into four types: ionic, molecular, covalent, and metallic. Ionic solids are composed of positive and negative ions that are bound together by electrostatic attraction.

Molecular solids are composed of atoms or molecules that are bound together by London dispersion forces, dipole-dipole forces, or hydrogen bonds.

Covalent-network solids are made up of atoms linked together by covalent bonds.

Metallic solids are composed of metal atoms bound together by metallic bonds.

So, The type of solid will substances forms : (a) Dimond forms covalent net work solid, (b) PH₃ forms molecular solid, (c) H₂ forms molecular solid, (d) Mg forms atomic metallic solid, (e) KCI forms ionic solid, (f) Quartz forms covalent net work solid, (g) NH₄NO₃ forms ionic solid, (h) SF₂ forms molecular solid, (i) Ar forms atomic solid, (j) Cu forms metallic solid, (k) C₆H₁₂O₆ forms molecular solid.

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ACL tender point location

Answers

We have ACL tender points in front of and behind our knee.These are located in the medial and lateral quadrants of the superior popliteal cavity.

What are ACL tender points?

Trigger points in the thigh muscles can cause pain in the thighs and knees. The femur is the longest and strongest bone in the body. The muscles that power the femur, quadriceps, hamstrings, and iliopsoas are also the largest and strongest muscles in the body. These thigh muscles connect the femur to the lower leg bones, the tibia and fibula, at the knee joint. Quadriceps trigger points are the most common cause of trigger point knee pain.

Healthy muscle fibers neither contract nor stretch at rest. Muscle fibers move closer together when contracted and move apart when stretched. In muscles that cause trigger point pain, the fibers are knotted and in constant contraction. The fibers around these knots are stretched by excessive tension, causing the muscle fibers to tighten.

Therefore, We have ACL tender points in front of and behind our knee. These are located in the medial and lateral quadrants of the superior popliteal cavity.

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The complete question is:

Where are ACL tender point located?

I’m very confused please help me tourer

Answers

Answer:

what is ur question hopefully i can help : )

Explanation:

What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60?

a
.
60
29
Cu
b
.
29
60
Cu
c
.
60
31
Cu
d
.
31
29
Cu

Answers

Copper | PubChem | Cu-60

The number of protons and neutrons in an element's atom are represented by the isotope's nuclear symbol.

It doesn't specify how many electrons are present. There is no mention of the neutron count. Instead, you must calculate it using the atomic number or protons' number. Lesson Summary. In the full nuclear symbol, the mass number (the sum of the protons and neutrons) is superscripted at the upper left and the atomic number (the number of protons in the nucleus) is subscripted at the lower left. The atomic number of an atom, which is represented by the sign Z, determines its chemical composition. The total amount of protons in a nuclear symbol. .

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what volume of carbon dioxide, measured at 25 °c and 741 torr, can be obtained by the reaction of 50.0 g of caco3 with 750 ml of 2.00m hcl solution? CaCO3(s) + HCL(aq) => CaCl2(aq) + CO2(g) + H2O (unbalanced)
a. 11.2 L
b. 12.5 L
c. 18.8 L
d. 9.4 L
e. 6.25 L

Answers

The volume of the carbon dioxide that is produced in the reaction is 12.5 L. Option B

What is the volume of carbon dioxide?

We know that a chemical reaction is said to occur when there is a combination of one or more reactants. We have to first obtain the limiting reactant in this case.

Number of moles of calcium carbonate = 50.0 g/100 g/mol

= 0.5 moles

Number of moles of HCl = 750/1000 * 2 = 1.5 moles

If 1 moles of carbonate reacts with 2 moles of HCl

0.5 moles  of carbonate reacts with 0.5 moles * 2 moles/1

= 1 mole

The limiting reactant is the carbonate

If 2 moles of carbonate produces 1 moles of carbon dioxide

0.5 moles of carbonate produces  0.5 * 1/2

= 0.5 moles of carbon dioxide

Using PV =nRT

P = pressure

V = volume

n = Number of moles

R = gas constant

T = temperature

V = nRT/P

V = 0.5 * 0.082 * 298/0.975

V = 12.5 L

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the process of breaking down foods, either mechanically or chemically, and then absorbing them is called

Answers

Enzymes that aid in protein, lipid, and carbohydrate digestion are produced by the pancreas. Additionally, a chemical that neutralizes stomach acid is produced there. The small intestine is where these enzymes and bile enter and aid in the digestion of the meal through specialized passageways known as ducts. Additionally, the liver aids in the bloodstream's processing of nutrients.

Food is broken down into components for circulatory absorption by the process of digestion, which involves both mechanical and enzymatic means. Proteins, carbs, and lipids are the three macronutrients in the diet that must be digested in order to be absorbed. The process of physically and enzymatically dissolving food into components for circulatory absorption is called digestion. Proteins, carbs, and lipids are the three macronutrients in the diet that must be digested in order to be absorbed.

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