For molecules of general formula AXIn (where n > 2), how do you determine if a molecule is polar?

(a) \(Cr_2(SO_4)_3\)(aq) and \((NH_4)_2CO_3\)(aq)
Complete ionic equation: \(Cr^{3+\)(aq) + \(3SO_{42}\)-(aq) + 2\(NH_4\)+(aq) + \(CO_3^{2-}\)(aq) → \(Cr_2(CO_3)_3\)(s) + 6\(NH^{4+}\)(aq) + 6\(SO_4^{2-}\)(aq)
Net ionic equation: \(Cr^{3+\)(aq) + 3 \(CO_3^{2-}\)(aq) → \(Cr_2(CO_3)_3\)(s)

(b) \(FeCl_3\)(aq) and\(Ag_2SO_4\)(aq)
Complete ionic equation: \(Fe^{3+\)(aq) + 3Cl-(aq) + 2Ag+(aq) + \(SO_4^{2-}\)(aq) → 2AgCl(s) + \(Fe^{3+\)(aq) + \(SO_4^{2-}\)(aq)
Net ionic equation: 2Ag+(aq) + 2Cl-(aq) → 2AgCl(s)

(c) \(Al_2(SO_4)_3\)(aq) and \(K_3PO_4\)(aq)
Complete ionic equation: \(2Al^{3+\)(aq) + 6\(SO_4^{2-}\)(aq) + 6K+(aq) + 2\(PO_4^{3-}\)(aq) → \(Al_2(PO_4)_3\)(s) + 6K+(aq) + 6\(SO_4^{2-}\)(aq)
Net ionic equation:  \(2Al^{3+\)(aq) + 2\(PO_4^{3-}\)(aq) → \(Al_2(PO_4)_3\)(s)

These are examples of double displacement or precipitation reactions, where two solutions containing ionic compounds are mixed and an insoluble product (precipitate) is formed.

The complete ionic equation shows all the ions present in the solution before and after the reaction, while the net ionic equation only includes the ions that participate in the formation of the precipitate.

In each reaction, the cations and anions switch partners to form new compounds. In the complete ionic equation, each ion is shown as either aqueous (aq) or solid (s) based on whether it remains in solution or forms a solid precipitate.

In the net ionic equation, only the ions that form the solid product are included, and any spectator ions that do not participate in the reaction are removed.

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The percent of the mass in a sample of zinc sulfate that comes from zinc would be 40.50%. Option 5.

The percent composition of a component in a substance is the ratio of the mass of the component and the mass of the substance itself.

This can be mathematically expressed as;

Pecent composition= mass of component/mass of substance x 100%

In this case, the substance is zinc sulfate, a compound that contains zinc, sulfur, and oxygen in a ratio 1:1:4.

The molar weight of zinc is 65.38 while the molar mass of the entire zinc sulfate is 161.442.

Thus, the percent of the mass of any sample of zinc sulfate that comes from zinc would be:

Percent zinc = 65.38/161.442 x 100

                    = 40.50%

In other words, the percent of zinc in any zinc sulfate sample would be 40.50%

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Claim: Woodpeckers don't get concussions while football players do because woodpeckers have evolved several adaptations that protect their brains from high impact forces that occur during pecking, while football helmets are not designed to prevent concussions.

Evidence: Woodpeckers have several adaptations that protect their brains, including a thick skull, a small brain cavity, and a specialized beak that absorbs shock. Additionally, woodpeckers have a hyoid bone that wraps around their skull, which acts as a shock absorber. In contrast, football helmets are designed to prevent skull fractures, but not concussions.

Reasoning: The adaptations in woodpeckers' skulls and beaks allow them to absorb and distribute the impact forces of their pecking, protecting their brains from injury. The hyoid bone in particular is able to compress and expand, reducing the force of the impact on the brain. Football helmets, on the other hand, are designed to prevent fractures by spreading out the force of the impact over a larger area. However, they are not effective in preventing concussions because they do not absorb or distribute the forces in the same way as woodpecker adaptations do. Therefore, while football helmets provide some protection, they are not enough to prevent concussions in players.

Answer:

2..............

................

Answer:

A. 2

Explanation:

Answer:

Explanation:

Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. ... A property closely related to an atom's mass number is its atomic mass.

a) The electron pair geometry of the compound with a sulfur atom double bonded to an oxygen atom on the left and the right and has a lone pair is tetrahedral, whereas its molecular geometry is bent. Each oxygen atom has two lone pairs.b) The electron pair geometry of the compound with a sulfur atom bonded to a chlorine atom on the left and the

right and has two lone pairs is tetrahedral, whereas its molecular geometry is bent. Each chlorine atom has three lone pairs.c) The electron pair geometry of the compound with a beryllium atom bonded to two chlorine atoms 180 degrees

apart, each chlorine atom having three lone pairs, is linear. Its molecular geometry is also linear.d) The electron pair geometry of the compound with a phosphorous atom bonded to a fluorine atom on the left, the right, and the bottom,

and has one lone pair is tetrahedral. Its molecular geometry is trigonal pyramidal. Each fluorine atom has three lone pairs.e) The electron pair geometry of the compound with a boron atom bonded to a fluorine atom on the left, the right, and the bottom, and each fluorine atom having three lone pairs is trigonal planar. Its molecular geometry is also trigonal planar.f) The electron pair geometry of the compound with a carbon atom bonded to a hydrogen atom on the left, the right, the top, and the bottom is tetrahedral. Its molecular geometry is also tetrahedral. The bond angle between the carbon and hydrogen atoms is 109.5 degrees.

The electron pair geometry of each compound is determined by its molecular geometry, which depends on the number of bonds and lone pairs of electrons around the central atom. When there are two bonded atoms and no lone pairs, the molecular geometry is linear. When there are three bonded atoms and no lone pairs, the molecular geometry is trigonal planar. When there are two bonded atoms and one lone pair, the molecular geometry is bent or angular. When there are four bonded atoms and no lone pairs, the molecular geometry is tetrahedral. When there are three bonded atoms and one lone pair, the molecular geometry is trigonal pyramidal.

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The electron pair geometry of all six compounds is tetrahedral, while the molecular geometry of (b), (d), and (e) is trigonal planar, and the molecular geometry of (a), (c), and (f) is tetrahedral.

On the other hand, molecular geometry refers to the actual arrangement of atoms in space.

a) In the case of sulfur dioxide the electron pair geometry is trigonal planar because the sulfur atom has three electron pairs and one lone pair, resulting in a bent or V-shaped molecular geometry.

b) For sulfur trichloride, the electron pair geometry is tetrahedral because the sulfur atom has four electron pairs and one lone pair, resulting in a trigonal pyramidal molecular geometry.

c) In beryllium chloride the electron pair geometry is linear because the central atom has only two electron pairs and no lone pairs, resulting in a linear molecular geometry.

d) For phosphorus trifluoride, the electron pair geometry is tetrahedral because the central atom has four electron pairs and one lone pair, resulting in a trigonal pyramidal molecular geometry.

e) In boron trifluoride, the electron pair geometry is trigonal planar because the central atom has only three electron pairs and no lone pairs, resulting in a trigonal planar molecular geometry.

f) Finally, for methane, the electron pair geometry is tetrahedral because the central atom has four electron pairs and no lone pairs, resulting in a tetrahedral molecular geometry.

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Answer:

concentration = mol/volume = 4/2 = 2M

When alkyl benzenes are reacted with HNO3 in H2SO4, they undergo nitration to form a mixture of ortho, meta, and para isomers. The ratio of these isomers depends on the electronic properties of the substituent on the benzene ring.

The substituents that are electron-donating (such as -CH3) increase the electron density on the benzene ring, making the ring more susceptible to attack by the electrophilic nitronium ion. This leads to a higher percentage of para product formation.

On the other hand, electron-withdrawing substituents (such as -NO2) decrease the electron density on the ring, making it less susceptible to attack by the nitronium ion. This leads to a lower percentage of para product formation.

Therefore, the rank of the alkyl benzenes from highest percentage of para product to lowest percentage of para product would be:

Toluene (-CH3)

Ethylbenzene (-C2H5)

Cumene (-C(CH3)3)

Nitrobenzene (-NO2)

Toluene would have the highest percentage of para product because the methyl group is an electron-donating group, increasing the electron density on the benzene ring. Nitrobenzene would have the lowest percentage of para product because the nitro group is an electron-withdrawing group, decreasing the electron density on the benzene ring.

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When the hydrogen chloride concentration doubles, the number of collisions between the reactants becomes increased, which causes the rate of the forward reaction to be faster.

The rate of a reaction is how fast a chemical reaction occurs i.e. the conversion of reactants to products.

The rate of a chemical reaction can be influenced by certain factors including the concentration of reactants.

The more the concentration of a reactant, the more the collision between the reactants and hence, the faster the reaction will proceed.

Therefore, when the hydrogen chloride concentration doubles, the number of collisions between the reactants becomes increased, which causes the rate of the forward reaction to be faster

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Answer:1. increases 2. increases

Explanation:

Got it right on plato!

1)proton number

2)neutron

3)(Z)

4)mass

if you work it put you will get the 3rd one I think

Answer:

Tricarbon octahydride has the formula C 3 H 8.This means it has three carbon atoms and eight hydrogen atoms.

Explanation:

Answer:

C3 H8

uR wElCOme

Answer:

Explanation:

The pH of a solution can be found by using the formula

\(pH = - log ([ {H}^{+} ])\)

From the question we have

\(pH = - log(1.0 \times {10}^{ - 5} ) \\ = 5\)

We have the final answer as

Hope this helps you

The hydrogen bonding of water is one of the main property of water which makes it responsible for all the other physical and chemical properties.

Water molecules are polar in nature and they form hydrogen bonds. Hence, they have a high boiling point , high specific heat and density. Water can exhibit the properties of an acid, as well as a base (amphoteric character). The water molecules are constantly moving and the hydrogen bonds continuously breaks and forms again. These hydrogen bonds are strong, which is the reason for the unique properties of water.

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The molarity of chloride ions in the solution is 0.712 M.

Molarity (M) is the amount of a substance in a certain volume of solution.

Molarity is also known as the molar concentration of a solution.

For NaCl, we use the following equation to determine the number of moles:

Given mass / Molar mass = number of moles

NaCl is assumed to weigh 1.50 g.

NaCl has a molar mass of 58.5 g/mol.

Using the values in the equation above, we obtain:

NaCl moles are equal to 1.50g/58.5g/mol, or 0.0256mol.

Both sodium and chloride ions are produced in one mole of sodium chloride (NaCl).

0.0256mol = moles of chloride ions

Regarding calcium chloride:

The following equation is used to determine the number of moles for a given molarity:

Molarity of the solution is calculated as follows: moles of solute * 100 / volume of solution (in ML).

(1)

Calcium chloride solution has a molarity of 0.100 M.

50.0 mL is the solution's volume.

Equation 1 is solved with the following values: 0.100M = Moles of CaCl2 * 1000 / 50

CaCl2 moles = 0.100M x 50

Moles of CaCl2 are equal to 0.100M*50/1000, or 0.005 mol.

One mole of calcium chloride yields two moles of chloride ions in addition to one mole of calcium ions.

Chloride ion moles equal (2 x 0.005) = 0.01 moles.

Now, we use equation 1 to determine the molarity of chloride ions in the final solution:

(0.0256 + 0.01) = 0.0356 moles of chloride ions are present in total in the solution.

50.0 mL is the total amount of solution.

Equation 1 is solved for the following values:

Chloride ion molecular weight = 0.0356 * 1000 / 50.0

The solution's molarity is 0.712M.

Consequently, the solution's molarity of chloride ions is 0.712 M.

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the chemical equation for the reaction between solid zinc sulfide and aqueous hydrobromic acid is ZnS(s) + 2HBr(aq) → ZnBr2(aq) + H2S(g), where "s" represents a solid state, "aq" represents an aqueous or liquid state, and "g" represents a gaseous state.

The correct chemical equation for the reaction of solid zinc sulfide with aqueous hydrobromic acid to form aqueous zinc(II) bromide and dihydrogen sulfide gas is:
ZnS(s) + 2HBr(aq) → ZnBr2(aq) + H2S(g).In this equation, "s" represents a solid state, "aq" represents an aqueous or liquid state, and "g" represents a gaseous state. The reactants of the equation are solid zinc sulfide and aqueous hydrobromic acid, while the products are aqueous zinc(II) bromide and dihydrogen sulfide gas. The reaction can be explained by the displacement of hydrogen from hydrobromic acid by zinc sulfide, which results in the formation of zinc bromide and hydrogen sulfide gas. The balanced equation shows that one molecule of zinc sulfide reacts with two molecules of hydrobromic acid to form one molecule of zinc bromide and one molecule of hydrogen sulfide gas.
In summary, the chemical equation for the reaction between solid zinc sulfide and aqueous hydrobromic acid is ZnS(s) + 2HBr(aq) → ZnBr2(aq) + H2S(g), where "s" represents a solid state, "aq" represents an aqueous or liquid state, and "g" represents a gaseous state.

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One of the three goals of environmental science, as proposed by various texts, is to understand how natural systems function.

This involves studying the interrelationships between living organisms and their environment, including the physical, chemical, and biological processes that shape the world around us. By gaining a deeper understanding of how these systems work, environmental scientists can develop better ways to manage and protect natural resources, minimize environmental impacts, and promote sustainable development.

Other goals of environmental science include identifying and addressing environmental problems, such as pollution and climate change, and finding solutions to these issues through scientific research and policy development.

Ultimately, the overarching goal of environmental science is to promote a healthier, more sustainable planet for all living beings.

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Answer:

he is right, top right

Explanation:

Answer:

18.65004 grams H2O

Explanation:

First, we need to write down the balanced chemical equation for the decomposition reaction:

2LiOH -> H2O + Li2O

Since we have grams of LiOH and we need to know the grams of water, we need to convert to moles since we can only compare moles to moles.

The amu of LiOH is 23.947.

The given grams of LiOH is 63.. To convert to moles, we will divide 63 by 23.947..

This gives us 2.6310 moles LiOH..

To convert to moles of H2O (and later grams of H2O), we will use the mole fractions from the balanced equation...

When we look at the balanced equation we can see that 2 moles of LIOH can produce 1 mol of Water, so:

2.6310 moles \(* \frac{1 molH_{2}O}{2 mol LiOH}\) = 1.3155 moles H2O

Now we will convert from moles to grams (we must multiply by the amu)

1.3155 moles H2O = 18.65 grams H2O

According to stoichiometry of the chemical equation of decomposition of lithium hydroxide 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical equations.

In the given example, as 47.9 g of lithium hydroxide produces 18 g water ,therefore 63 of lithium hydroxide will produce 63×18/47.9=23.6 g of water.

Thus, 23.6 g of water are produced from the decomposition of 63 grams of lithium hydroxide.

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Answer:

c

Explanation:

they spread farther apart as they lose their structure

Answer:

Explanation:

molarity = (moles of solute)/(liters of solution) = 9.7/2.3 = 4.2

Answer:

hope this helped

Calcium Hydroxide + Sulfuric Acid = Calcium Sulfate + Water

Explanation:

Answer:

im not entirely sure what needs to be done but the 2NH3 is the product and the other half is the reactants .

if any elements are added to others it is the reactants

this is a breakdown of a compound because the arrow always indicates the direction of the reaction .

Answer:

Here^

Explanation:

The matter starts heating, up as if it's ice , turns into a liquid.

Answer:

3.64M is the molar concentration of the solution

Explanation:

Molarity (Molar concentration, M) is an unit of concentration widely used in chemistry defined as the ratio between the moles of solute (In this case, KCl) and the volume of the solution in liters.

As you can see, the moles of KCl are 2.21 mol, and the volume of the solution is 0.6068L. The molarity is:

2.21mol / 0.6068L =

Total, 15,780 Joules of heat to raise 50 grams of water from 13°C to 88°C.

To calculate the amount of heat required to raise the temperature of 50 g of water from 13°C to 88°C, we need to use the specific heat capacity of water;

q = m × c × ΔT

where;

q = heat required (in Joules)

m = mass of water (in grams)

c = specific heat capacity of water (in Joules/gram-Kelvin)

ΔT = change in temperature (in Kelvin)

The specific heat capacity of liquid water (H₂O(1)) is 4.184 J/g.K. So, we can substitute the given values into the above equation;

q = 50 g × 4.184 J/g.K × (88°C - 13°C)

q = 50 g × 4.184 J/g.K × 75 K

q = 15,780 J

Therefore, it requires 15,780 Joules of heat.

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Answer:

270

Explanation:

Once you add more mass to something the mass doesn’t go away you add more mass.

hope this helps!