Mercury has a specific weight of 133 kn/m^3 when the temperature is 20C. Determine the density and specific gravity at this temperature.

Answers

Answer 1

Mercury has a specific weight of 133 kn/m^3 when the temperature is 20C.

Density of given mercury = 133kg/m3

Density of water = 1000 kg/m3

specific gravity of mercury = Density of Hg/ Density of H20

= 133/1000 = 0.133

0.133 is the specific gravity of given Hg.

What is specific gravity?

The ratio of the densities of two different objects or substances is known as specific gravity. The ratio of the substance's density to the density of water is the most common way to define specific gravity.

Given, specific weight of 133 kg/m^3

Thus, Density of given mercury = 133kg/m3

Density of water = 1000 kg/m3

Thus, specific gravity of mercury = Density of Hg/ Density of H20

= 133/1000 = 0.133

0.133 is the specific gravity of given Hg.

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Related Questions

Sulfuric acid + sodium hydroxide

Answers

Sulfuric acid + sodium hydroxide—> sodium sulfate + water

Answer:

sulfuric acid + sodium hydroxide -> sodium sulfate + water

NaOH (aq) + H₂SO₄ (aq) → Na₂SO₄ (aq) + H₂O

(″ロ゛) x

What type of signaling molecules are the incretins? autocrine signals paracrine signals juxtacrine signals classic hormones

Answers

Hsjskskdkdkskskkslslslelelelelelelele

A forensic scientist is attempting to identify a type of plastic found at a crime scene. What test could she conduct on the plastic to observe its chemical properties?

Break the plastic into pieces
Dissolve the plastic in water
Add acid to the plastic to see if it reacts
Observe the plastic under a microscope

Answers

The chemical properties could be obtained by adding acid to the plastic to see if it reacts.

What are chemical properties?

Chemical properties are those properties that could only be observe when a substance undergoes chemical change. In this case, a chemical change could also be called a chemical reaction.

A substance could be said to undergo a chemical reaction  if there is a rearrangement of the atoms of the compound. This would ultimately lead to the formation of a new substance.

Now the forensic scientist wants to know the chemical properties of the plastic. This could be done by reacting the plastic with acid.

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Answer:

The short answer is (C)  Add acid to the plastic to see if it reacts

Explanation:

Got it right on my quiz.

Chromium forms a body centered cubic unit cell. if the radius of a chromium atom is 125 pm, what is the density of chromium in g/cm3?

Answers

The density of chromium is 7.15 g/cm³.

There is three types of cubic cell:

1) simple cubic unit cell.

2) body-centered cubic unit cell.

3) face-centered cubic-unit cell.

In body-centered cubic unit cell there are two atoms in one cell.

m(Cr) = 52 amu; mass of chromium atom

r(Cr) = 125 pm; the radius of a chromium atom

V(Cr) = 4/3 × r³ × π

V(Cr) = 4/3 × (1.25×10⁻⁸cm)³ × 3.14

V(Cr) = 8.18×10⁻²⁴ cm³; the volume of chromium atom

d(Cr) = 52 / 8.18×10⁻²⁴ cm³ × 2 × 6.022×10²³

d(Cr) = 7.15 g/cm³; density of a chromium atom

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What is the value of ka for the methylammonium ion, ch3nh3 ? kb(ch3nh2) = 4.4 x 10-4
a) 4 x 10-4
b) 4.8 x 10-6
c) 4 x 10-10
d) 2.3 x 10-11

Answers

The correct answer is 2.3×[tex]10^{-11}[/tex]

The auto-ionization constant of water is related to the dissociation constant of an acid or base with its conjugate:

KaKb =Kw=1×10⁻¹⁴

Constant of acid dissociation

Calculations of an acid dissociation constant are used to quantify an acid's potency.

When HA, a chemical species, dissociates into A- and H+ at equilibrium, the acid dissociation constant is utilized. The conjugate base of the acid is the anion.

When both the forward and backward reactions proceed at the same rate, the reaction is in equilibrium.

Acid strength is typically measured using the pKa, which is equal to the negative log of the Ka value. Stronger acids are those with smaller pka values and larger Ka values, respectively. Here is a calculation of acid dissociation.

Ka=1×10⁻¹⁴/4.4×10⁻⁴

=2.3×10⁻¹¹

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A student investigated the concentration of a solution of sodium hydroxide by titration with a 0.0480 mol/dm3 ethanedioic acid solution.
This is the method used.

1. Measure 25.0cm3 of the sodium hydroxide solution into a conical flask using a 25.0cm3 pipette

2. Add 2 drops of indicator to the sodium hydroxide solution

3. Fill a burette with the 0.0480 mol/dm3 ethanedioic acid solution to the 0.00cm3 mark

4. Add the ethanedioic acid solution to the sodium hydroxide solution until the indicator changes colour

5. Read the burette to find the volume of the ethanedioic acid solution used

Suggest two improvements to the method that would increase the accuracy of the result.

Answers

The accuracy of the results could be improved by;

1) The use of porcelain to observe the end point

2) Rinsing the burette with the ethanedioic acid solution before the titration begins.

What is titration?

The term titration has to do with the process by which we use a neutralization reaction to be able to determine the concentration of substances that participate in the reaction. Now we know that titration is one of the ways by which we are able to carry out a volumetric analysis. The term volumetric analysis has to do with the type of analysis that involves the use of the volume of the analyte.

The titrant is put into the flask and the titrand is put in the burette. We always have to make use of an indicator to be able to know when the end point or the equivalence point of the reaction have been achieved in the process of the titration.

The accuracy of the results could be improved by;

1) The use of porcelain to observe the end point

2) Rinsing the burette with the ethanedioic acid solution before the titration begins.

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Sarah and evan are in the same science class. the teacher asks the class to design an experiment to determine the effect of acid rain on limestone. sarah designs an experiment which uses chalk and carbonic acid at a ph of 5.7, because she knows that chalk has the same chemical make-up as limestone and she knows that acid rain is primarily made up of carbonic acid at a ph around 5.7. evan designs an experiment which uses limestone tiles and acid rain collected from the environment. how do these experimental methods compare?

Answers

Sarah knows that chalk has the same chemical make-up as limestone and she knows that acid rain is primarily made up of carbonic acid at a ph around 5.7. So the correct option is (B) Sarah's materials are cheaper and easier to obtain, but Evan's materials will allow him to better mimic real life.

Limestone is a sedimentary rock mostly made of calcium carbonate (calcite) or calcium and magnesium double carbonates (dolomite). Small fossils, shell pieces, and other fossilised debris are frequently found in its composition.

Calcium oxide, which is derived from limestone, is used in the manufacture of steel, mining, paper, water treatment and purification, and plastics. Lime is extensively used in agriculture and the production of glass.

The biggest myth about limestone is that it's a delicate stone. Actually, limestone can be anything from extremely hard to soft. It should be selected keeping in mind the final design while paying close attention to its intended usage.

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The complete question is ''Sarah and Evan are in the same science class. The teacher asks the class to design an experiment to determine the effect of acid rain on limestone. Sarah designs an experiment which uses chalk and carbonic acid at a pH of 5.7, because she knows that chalk has the same chemical make-up as limestone and she knows that acid rain is primarily made up of carbonic acid at a pH around 5.7. Evan designs an experiment which uses limestone tiles and acid rain collected from the environment. How do these experimental methods compare?

A. Sarah's experimental results will be easier to predict. Evan's results will be impossible to predict since he uses real acid rain.

B. Sarah's materials are cheaper and easier to obtain, but Evan's materials will allow him to better mimic real life.

C. Evan's experimental design will prevent him from being able to form a logical conclusion, whereas a conclusion can be made with Sarah's design.

D. Evan's experiment can be preformed at any time, but Sarah's experiment can only be performed when there is a rainstorm.

Calculate the molarity and molality of an hf solution made up of 11.0 g hf in 105.0 g of water. the density of the solution is 0.94 g/ml.

Answers

Molality and molarity are same = 5.23M

(a)Molarity =  moles of solute /  volume of solution (in L)

​Molarity =  mass of solute /   molecular weight of solute × volume of solution (in L)

Molarity =  11.0 / 20.01 × 0.105

​5.23M = Molarity

(b) Molality =  moles of solute /  volume of solution (in kg)

Molality = mass of solute /   molecular weight of solute × volume of solution (in kg)

Molality = 11.0 / 20.01 × 0.105

​5.23M = Molality

Hence, both molality and molarity are same = 5.23M

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What is the experimental quanity that serves as a measure of resistance to flow of a liquid?

Answers

Viscosity  is the experimental parameter used to assess a liquid's resistance to flow.

What is Viscosity?

Viscosity is the ability of a fluid (liquid or gas) to resist changing its shape or allowing nearby parts to move in relation to one another. Viscosity is a sign of flow resistance.

The fluidity, a metric indicating the ease of flow, is the reciprocal of viscosity. For instance, molasses is more viscous than water.

The viscosity of a liquid is a significant metric because the user may interpret it as a gauge of quality; in some cases, a thicker liquid may be perceived as having higher quality than a thinner one.

The texture of food also has a property called viscosity.

Therefore, viscosity  is the experimental quality that serves as a measure of resistance to flow of a liquid.

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When two amino acid monomers are positioned so that the carboxyl group of one is adjacent to the amino group of the other, they can be joined through a reaction. True or false?.

Answers

The statement is true.

When two amino acid monomers are positioned so that the carboxyl group of one is adjacent to the amino group of the other, they can be joined through a dehydration reaction.

What are amino acids?

The building blocks of protein in your body are called amino acids. In other words, you can't actually develop new muscle without your amino acids when it comes to protein synthesis. Your body can produce amino acids on its own as a byproduct of regular activity, which are known as your nonessential amino acids.

A dehydration reaction can unite two amino acid monomers when they are arranged so that the carboxyl group of one is next to the amino group of the other.

Thus, the made assertion is true.

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Analyze the structure of 4‑sec‑butyl-5-ethyl-3-methyloctane. Identify the number of ethyl and methyl groups in the compound. Note that these groups are not necessarily confined to those specifically mentioned in the name.

Answers

The structure of 4‑sec‑butyl-5-ethyl-3-methyl octane has 4 ethyl groups and 2 methyl groups.

Since ethyl and methyl groups are saturated, there are no double or triple bonds between the atoms in these compounds. The main distinction between ethyl and methyl is that the former is made up of two carbon atoms while the latter is made up of just one. It is customary to write the chemicals' names in alphabetical order, so ethyl comes before methyl and then precedes propyl. The carbon atoms in a cycloalkane are linked together in a ring, hence the name. Just two types of alcohol are methanol and ethanol. Ethanol, also referred to as ethyl alcohol, has a chemical composition of two carbon atoms. Methanol also referred to as methyl alcohol, is made up of just one carbon atom.

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A scientist collected 6.29 g ch4 gas (methane) through fracking how many moles of methane were collected?

Answers

Moles = mass/molar mass

mass= 6.29 g.

molar mass = 16.04 g .

Moles of methane collected are = 6.29/16.04

= 0.39.

0.39 moles of methane gas was collected.

What is methane gas?

Hydrocarbon methane (CH4) is a main constituent of natural gas. Because methane is a greenhouse gas (GHG), its presence in the atmosphere has an impact on the planet's climate and temperature. There are many anthropogenic (influenced by humans) and natural sources that release methane.

High methane levels may reduce the amount of oxygen breathed from the air. This can cause symptoms like headaches, face flushing, slurred speech, visual problems, memory loss, mood swings, and altered eyesight. In dire circumstances, it's possible to have changes in breathing and heart rate, balance problems, numbness, and unconsciousness.

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Which example shows an organism that cannot reach homeostasis through internal changes?
Responses


Circulation decreases in a bird when it becomes too warm.


A dog shivers when it is too cold.

A lizard is cold, and it moves to a sunny rock to warm up.

A person gets a fever in response to a flu infection.

Answers

As an example option C. A lizard is cold, and it moves to a sunny rock to warm up,  hows an organism that cannot reach homeostasis through internal changes.

Homeostasis is the nation of steady internal, bodily, and chemical conditions maintained via dwelling systems. that is the circumstance of gold standard functioning for the organism and consists of many variables, which include body temperature and fluid balance, being kept inside certain pre-set limits.

Homeostasis is the ability to keep a quite stable internal kingdom that persists regardless of modifications within the world outside. All dwelling organisms, from flora to puppies to human beings, must alter their internal environment to procedure power and ultimately continue to exist.

Homeostasis is maintained by using a series of manipulation mechanisms performed at the organ, tissue, or cell degree. these management mechanisms include substrate supply, activation or inhibition of person enzymes and receptors, synthesis and degradation of enzymes, and compartmentalization.

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A graduated cylinder which has been filled with 20. 00 ml of water. A solid object is added to the graduated cylinder and the water level rises to the 26. 40 ml. Calculate the mass (in grams) of the solid object which has a density of 3. 26 g/ml

Answers

The solid object that has a density of 3.26 g/ml has a mass equal to 20.864 g.

If the water level rises to 26.40 ml from an initial of 20.00 ml after a solid object is added, then the difference between the final and initial volume of water is the volume of the solid.

volume of solid = final volume - initial volume

volume of solid = 26.40 ml - 20.00 ml

volume of solid = 6.40 ml

If the solid object has a density of 3. 26 g/ml and a volume of 6.40 ml, using the formula for density, solve for its mass.

density = mass/volume

3. 26 g/ml = mass/6.40 ml

mass = 3. 26 g/ml(6.40 ml)

mass = 20.864 g

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Please help me with this sheet on distillation, the circles require an explanation on what is happening. I have colour coded them to make it easier for you ♡

Answers

Answer:

Green: Heating & Evaporation

It is the solution which is to be distilled (separate water from the salt). Heat is applied at the flask and the solution boils hence producing vapour.

Yellow: Temperature measurements

At this point, the temperature of the vapor is measured by the thermometer. Here, discrimination occurs, when temperature is 100°C (Bpt. of water), then the temperature is made constant.

Pink: Ejection of warm water

This is the outlet on the lie big condensor of water which absorbs the temperature of the vapor. This water is released when vapor is undergoing condensation (turning into liquid)

Green: Insertion of cold water

Cold water is passed through the condensor so as to cool down the vapor into liquid

Red: Condensation

Along the tube, vapor is being cooled down and condensed into a liquid characteristic.

Purple: Water jacket (condenser)

This is the condenser tube through which cold water passes to cool down the vapor.

Blue: Distillate

The condensed vapor (water) is collected in a conical flask

Explanation:

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Why do halogens not form positive atoms?

Answers

Answer:

Due to the fact that halogens have an outer shell made up of seven valence electrons, they frequently obtain an additional electron and a negative charge.

Halogens have an outer shell of seven valence electrons, so they tend to gain an extra electron and gain a negative charge.

What change must made to the coefficients to balance this equation?

Answers

Answer:

C - switch the 3 and the 4

The way I did it is by rewriting the equation again but without the numbers and just balancing it myself

If I have an object with a density of 2.42 g/mL and a mass of 27 g, what is the volume, in mL ?

Answers

55ml is the volume in ml, answer is a

Are those that can be replenished naturally. sunlight, which can be used for solar energy, is an example. question 26 options: nonrenewable resources renewable resources natural resources manufactured resources

Answers

Sunlight, which can be used for solar energy, is an example for renewable resources.

Renewable resources can be replenished and they are nondepletable. Some examples are solar energy,wind power, hydropower, geothermal, and biofuels.

Solar radiation is the source of electric energy. Solar energy is harnessed using a solar power to generate electricity.

It can be active solar or passive solar. It depends on how they capture and distribute solar energy or convert it into solar power

Biofuel is renewable energy source, but not green energy source.

Natural gas is not renewable recourse, because every year is less and less natural gas.

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What volume is occupied by 0.102 molmol of helium gas at a pressure of 0.95 atmatm and a temperature of 305 kk ?

Answers

The volume occupied by 0.102 mole of the helium gas is 2.69 L

Data obtained from the question

The following data were obtained from the question:

Number of mole (n) = 0.102 moles Pressure (P) = 0.95 atm Temperature (T) = 305 KGas constant (R) = 0.0821 atm.L/Kmol Volume (V) =?

How to determine the volume

The volume of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both sides by P

V = nRT / P

V = (0.102 × 0.0821 × 305) / 0.95

V = 2.69 L

Thus, the volume of the gas is 2.69 L

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According to the law of conservation of mass, which statement is true?

Answers

Answer:

It's the last option,

Explanation:

In a chemical reaction, the mass of the reactants must equal the total mass of the products, assuming that the reaction has gone to completion.

Meaning that option D is correct (last one)

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Answer: anwser D

Explanation: HOPE THIS HELPS!!!

You have found two rocks one has a mass of 10 g the other 20 g both rocks have the same volume which rock has the greatest density

Answers

By comparing the density of the two rocks, Rock B has the greater density.

What is the density of the the two rocks?

The density of a substance is a measure of the compactness of the particles of that substance.

The density of a substance is defined as the ratio of the mass amd the volume of that substance

Density = mass/ volume

The densities of the two rocks are determined as follows:

mass of rock A = 10 g

mass of rock B = 20 g

volume of the two rock = v

Density of Rock A = 10/v

Density of Rock B = 20/v

Ratio of density of Rock A and B = 1/2

Therefore, Rock B has the greater density.

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Calculate the molalities of the following aqueous solutions: (a) 1.036 m sugar (c12h22o11) solution (density of solution = 1.095 g/ml)

Answers

the molalities of the following aqueous solutions: (a) 1.036 m sugar (c12h22o11) solution (density of solution = 1.095 g/ml)

Molality = 1.096/(3.029 * 10 ^ -3) = 361.8 m

What is molality?

Molality is the ratio of moles of solute to kilogrammes of solvent (m). The following is the molality formula:

Molality (m) = kilogrammes of solvent / moles of solute.

Molality is the ratio of moles of solute to kilogrammes of solvent (m). Students should keep in mind that the moles are measured in proportion to the mass of the solvent and not the mass of the solution while using the molality formula, which is presented as follows.

Density = m/ volume = 1.095g/ml

Thus, weight of solvent = 1.095g for 1 ml

Moles of solvent = 1.036/342 moles = 3.029 * 10 ^ -3

Molality = 1.096/(3.029 * 10 ^ -3) = 361.8 m

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An organism was kept at a temperature of 40°C for a period of 2 weeks. At the end of that time, the investigator determined that the organism was sterile. To support the hypothesis that high temperatures cause sterility, the investigator should be able to show that the

1. organism was not sterile before the experiment period began.
2. high temperature did not alter the blood pressure of the organism
3. pituitary gland of the organism had not degenerated.
4. organism was homozygous for temperature sensitivity.​

Answers

The investigator should show that the organism was not sterile before the experiment began. So the correct option is A.

What is a scientific hypothesis?

A scientific hypothesis is a theory that offers a speculative explanation for a phenomenon or a specific group of related events that have been observed in the natural world. The capacity to be supported or disproven by observation and experimentation are the two main characteristics of a scientific hypothesis, and they are embodied in an "If...then" statement that summarises the notion. In the middle of the 20th century, British philosopher Karl Popper, who was of Austrian descent, established the idea that a scientific theory might be both falsified and tested.

The scientific method, the strategy used by scientists to try to comprehend and evaluate theories regarding natural events, includes the formation and testing of hypotheses. The process of developing a hypothesis is commonly referred to as creative and is based on prior scientific understanding, intuition, or experience.

Therefore, the correct option is A.

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3. Carbon reacts with oxygen to produce carbon dioxide: C+ O₂ → CO₂. Calculate the mass of carbon required to produce
17.6 g of carbon dioxide. (Relative atomic masses: C = 12,0=16)
[4 marks]
mass of carbon

Answer :
?

Answers

the mass of carbon required to produce

17.6 g of carbon dioxide will be 6 gram.

The weighted average of the molecular masses of a material, measured on a scale where a carbon-12 atom has a mass of precisely 12 units, is the substance's relative molecular mass.The number of atoms in exactly 12 grams of pure carbon-12 is the value of a mole.An exothermic process occurs when carbon and oxygen combine to form carbon dioxide, which generates 394 kJ/mol of heat.

In the reaction,

C+ O₂ → CO₂

Given,

The atomic mass of Carbon is 12g/mol

molar mass of O2 is 32g/mol

1 mole of C get reacted with 1 mole of O2.

no. of moles in O₂ = 16/32 = 0.5

so, 0.5 moles of Ow will react with 0.5 moles of C

Moleculer weight of Carbon is 12

Mass of carbon = 0.5 × 12 = 6 gm

Hence, mass of carbon required is 6 g.

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After extraction of the benzoic acid into the aqueous solution as its anionic salt, the ether solution was then washed with water two further times. What do you think was the purpose of these two wash steps?.

Answers

To remove any remaining unreacted inorganic component (from the added separating reagent) in the ether solution, two additional washes were performed after extracting benzoic acid into the aqueous solution as its anionic salt.

Benzoic acid must first be extracted from a mixture by adding NaOH, and then any excess NaOH must be removed in order to continue. Further, to get rid of the excess NaOH in the solution, it is washed with water twice or three times.

To reduce the amount of residue and other impurities in the layers, washing is done. The polar impurities, such as the leftover anionic salt of benzoic acid, tend to migrate to the water when washing, giving you a purer organic layer because ether is non-polar and water is polar.

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Which bonds rely on the attraction of positive and negative charges? select all that apply.

Answers

Ionic bonds and hydrogen bonds rely on the attraction of positive and negative charges.

Which bonds rely on positive and negative charge attraction?

As a result, a positively charged iron and a negatively charged ion are formed. The bond formed by these two ions is known as an ionic bond. A pair of atoms joined by a polar covalent bond: one atom has a slight positive charge and the other has a slight negative charge. Electronegativity refers to an atom's ability to attract electrons. The bond formed by the H of one water molecule and the O of another. A hydrogen bond is the bond between the H of one water molecule and the O of another water molecule.A covalent bond formed between two atoms with unequal electronegativities results in unequal electron sharing. Unequal electron sharing results in partially positive and partially negative charges at the bond's opposite ends.

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Draw the structure for 1,3-dinitrocyclopentane, making sure to add all non-zero formal charges

Answers

In the image provided below, you can see the structure of 1,3-dinitrocyclopentane.

We can conclude the following information from the compound's name, 1,3-dinitrocyclopentane, which will assist us in drawing the structure :-

1,3 - position of NO₂ groups, di - two, nitro - NO₂, clo - cyclic, pentane - five.

➤ The following are the general steps for drawing any compound's        Lewis structure:

Calculate the number of carbons and hydrogens.Connect the carbons with one another.Add the hydrogens and check that each carbon has four bonds and thus meets the octet rule.

According to the Octet Rule almost all atoms, in this case, carbon must always have four bonds because they are most stable with eight total electrons.

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Determine the formula unit and name for the compound formed when each pair of ions interacts. in the formula capitalization and subscripts are graded. spelling counts al3 and cn-

Answers

In each question we need to balance the charge to get formula

[tex]Al(CN)_{3}[/tex]) Aluminum Cyanide

[tex]CaSO_{4}[/tex] Calcium Sulfate

[tex]LINO_{3}[/tex] Lithium Nitrate

[tex]NH_{4} CL[/tex] Ammonium Chloride

Ionic interaction is the attractive force between ions with opposite charges. Also called an ionic bond, it is the force that holds ionic compounds together. Like charges repel and opposite charges attract.

Intermolecular interactions occur between molecules or atoms that are not connected by bonds. Molecular interactions include cohesion (like-like attraction), adhesion (like-like attraction), and repulsion between molecules.

Divide the molar mass of the compound by the molar mass of the molecular formula. The result will be an integer or very close to an integer. Multiply all subscripts of the molecular formula by the integers found in step 2. The result is the sum formula

Hence, the result will be the sum formula

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Does NaCI have a high melting point

Answers

Answer:

Yes, at 801 °C

Explanation:

Other Questions
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