What do we call the temperature reported by the thermometer in simple distillation?

The percent yield of zinc carbonate is 5.91%. This suggests that the reaction did not go to completion, and there was likely some loss of product during the experiment.

To find the percent yield of zinc carbonate, we need to compare the actual yield (what was obtained in the experiment) to the theoretical yield (what would be obtained if the reaction went to completion).

First, let's calculate the theoretical yield of zinc carbonate:

Now, let's calculate the percent yield:

The actual yield  \(ZnCO_{3}\) is given as 12.6 g.

The percent yield is calculated as:

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Full Question: A reaction between 1.7 moles of zinc iodide and excess sodium carbonate yields 12.6 grams of zinc carbonate. This is the equation for the reaction: Na2CO3 + ZnI2 → 2NaI + ZnCO3. What is the percent yield of zinc carbonate? The percent yield of zinc carbonate is %

The Ground state electronic configuration of  Cr2+:[Ar] 3d4, Cu2+: [Ar] 3d9, Co3+: [Ar] 3d6

Electronic configuration, sometimes referred to as electronic structure or electron configuration, is the arrangement of electrons in orbitals that surround an atomic nucleus.

1. Cr2+

Atomic no.of Chromium(Cr)=24  

a ground state Chromium's electronic structure is as follows: [Ar] 4s1 3d5 = 1s2 2s2 2p6 3s2 3p6

(Atomic no.of [Ar](argon) = 18)

so,ground state electronic configuration for Cr2+:

[Ar] 4s0 3d4 =[Ar] 3d4

so, ground state electronic configuration of Cr2+:

[Ar] 3d4

2. Cu2+

Atomic number of Copper(Cu)= 29

Ground state electronic configuration of Cu:

[Ar] 4s1 3d10

so, ground state electronic configuration of Cu2+:

[Ar] 4s0 3d9 = [Ar] 3d9

so,electronic configuration of Cu2+:

[Ar] 3d9

3.Co3+

Atomic number of Cobalt(Co)=27

Ground state electronic configuration of Co:

[Ar] 4s2 3d7

so,electronic configuration of Co3+:

[Ar] 4s0 3d6 = [Ar] 3d6

So,electronic configuration of Co3+:

[Ar] 3d6

Therefore the Ground state electronic configuration of

Cr2+:[Ar] 3d4, Cu2+: [Ar] 3d9, Co3+: [Ar] 3d6

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Answer:

This statement is correct

Explanation:

Water is made up of 2 hydrogen atoms and 1 oxygen atom while salt is made up of 1 atom of sodium and 1 atom of chloride

:)

Answer:

Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.

Explanation:

Answer:

The electrons are transferred from one atom to another. The atom that loses electrons becomes positive.

Explanation:

I don't really understand what form of an answer you need but I hope this helps?

The concentrations of I- , S2O8 2-, and S2O3 2- in each pair of test tubes after the solutions are mixed together are 1/4, 4/5, 1.

Let assume the solutions are mixed, so

I- has only one ion to itself so concentration will be 1*1/4 = 1/4

S2O8 2- has two ion to itself so concentration will be 2* 2/5 =4/5

S2O3 2- also has two ions attached to itself so concentration will be 2*3/6 =6/6 = 1.

Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.

 Any type of chemical mixture can be referred to by the term "concentration," however solutes and solvents in solutions are most usually mentioned. There are different types of molar (quantity) concentration, including normal concentration and osmotic concentration.

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Answer:

Molarity is defined as the number of moles of solute per liter of solution. In this problem, we are given the number of moles of sugar and the volume of the solution in milliliters. We first need to convert the volume to liters before we can calculate the molarity.

To convert milliliters to liters, we divide by 1000:

908.08 milliliters = 908.08/1000 = 0.90808 liters

Now we can use the formula for molarity:

Molarity = moles of solute / liters of solution

Plugging in the given values, we get:

Molarity = 0.55 moles / 0.90808 liters

Molarity = 0.606 M (rounded to three significant figures)

Therefore, the molarity of the student's sugar solution is 0.606 M.

Answer:

The molarity of the student's sugar solution is 0.60 M.

Explanation:

Answer:

An insect would have an easier time walking on the surface of water than on the surface of ethanol.

Water's stronger intermolecular forces lead to higher surface tension.

Higher surface tension allows water to support the insect.

Answer:

An insect would have an easier time walking on the surface of water than on the surface of ethanol.

Water's stronger intermolecular forces lead to higher surface tension.

Higher surface tension allows water to support the insect.

Explanation:

Answer:

2,2- dichloro-heptane

Explanation:

The IUPAC name of the compound is 2,2-dichloro-heptane

Answer:

i never thought about it that way

Explanation:

your right

Answer:

Chemical or Physical:

Potassium Metal has a boiling point of 63 degrees C and a melting point of -7 degrees C.

The proper whole number coefficient for each substance to yield a balanced equation is option 1 that is 2, 1, 2.

The proper whole number coefficient for each substance to yield a balanced equation is option 1 that is 2, 1, 2. Balancing a chemical reaction is done to find out the overview of that reaction and to find the answers related to that equation. like we can tell many things about the equation just by knowing the coefficients of the terms in that equation. we can tell about the percentage and existence of the products and reactants in the equation. if we know the coefficients of the elements and products we can tell about the mole of the reactants and products in the chemical equation. By this information, we can consider that the proper whole number coefficient for each substance to yield a balanced equation is option 1 that is 2, 1, 2.

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Answer:

6

Explanation:

The coordination number of the metal atom in the [Fe(NCS)(H2O)5]2+ complex is 6.

This means that there are six surrounding atoms or molecules (five water molecules and one NCS ligand) directly bonded to the central iron (Fe) atom in the complex.

Hope it helps!!

The coordination number of the metal atom in the [Fe(NCS)(H2O)5]2+ complex is six.

Coordination number is the total number of neighbors (atoms or ions) that a central atom has in a coordination compound or a complex. Coordination compounds are chemical species that have a central metal ion bonded to a set of molecules or ions, known as ligands.

                       These ligands are capable of donating a pair of electrons to the central metal ion and thus, form coordinate covalent bonds.Coordination number of metal ion in [Fe(NCS)(H2O)5]2+ complex:In the given coordination compound, Fe(II) is the central metal ion that is coordinated with five water molecules and one NCS– anion ligand.

Thus, the total number of coordinate covalent bonds formed between Fe(II) and its ligands is 6.Therefore, the coordination number of the metal atom in the [Fe(NCS)(H2O)5]2+ complex is six.

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The oxidation state of the metal species, Fe, in the complex ion [Fe(CN)(CO)5]2- is -1.

In order to determine the oxidation state of the metal species (Fe) in the complex ion [Fe(CN)(CO)5]2-, we first need to examine the individual ligands and their respective charges.

The ligands in the complex ion are cyanide (CN-) and carbonyl (CO). Cyanide is a monodentate ligand with a charge of -1, while carbonyl is a neutral ligand with a charge of 0. Since there is only one cyanide ligand, the total charge from cyanide is -1. There are five carbonyl ligands, but as they are neutral, they do not contribute any charge to the complex.

Now, we know the overall charge of the complex ion is -2, as indicated by the 2- in the formula. Considering the charges from the ligands, we can set up an equation to find the oxidation state of the metal species, Fe:

Fe + (-1) + 5(0) = -2

Simplifying the equation, we get:

Fe - 1 = -2

Adding 1 to both sides of the equation, we arrive at:

Fe = -1

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Answer:

0.049 g of Ag

Explanation:

From the question;

Ag^+ (aq) + e ----->Ag(s)

1 e = 96500 C

Note that Q= It

Where;

I = current and t= time taken

108 g of silver is deposited by 96500 C of electricity

x g is deposited by (0.49 * 90) C

x = 108 * (0.49 * 90) /96500

x= 0.049 g of Ag

Answer:C, 0.746 mol Ag.

1 mol Ag = 6.022 x 1023 atoms of Ag -> 4.49 x 1023 atoms of Ag x 1mol Ag/6.022 x 1023 atoms -> 0.746 mol Ag

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore,  0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole =given number of atoms ÷ 6.022×10²³(Avogadro number)

given number of atoms of Ag=4.49 x 10²³ atoms

Substituting the values

mole= 4.49 x 10²³ ÷ 6.022×10²³

mole =  0.746 mol

Therefore,  0.746 mol of Ag contain 4.49 x 10²³ atoms Ag.

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Answer:

B) -4.1 units

Explanation:

According to this question, a state property X has a value 89.6 units. It undergoes the certain changes as follows:

- first increase by 3.6 units

- then increase by another 18.7 units

- then decrease by 12.2 units

- and finally attains a value of 85.5 units

This can be mathematically represented by 89.6 - {3.6 + 18.7 - 12.2 - x) = 85.5

To get x, we say;

89.6 + 3.6 = 93.2

93.2 + 18.7 = 111.9

111.9 - 12.2 = 99.7

99.7 - 85.5 = 14.2units.

The changes that occured is represented as follows:

= (3.6 + 18.7) - (12.2 + 14.2)

= 22.3 - 26.4

= -4.1 units

The mass of magnesium cyanide needed to prepare the solution is 1.57 g

We'll begin by calculating the number of mole of Mg(CN)₂. This can be obtained as follow:

Volume = 275 mL = 275 / 1000 = 0.275 L

Molarity of Mg(CN)₂ = 0.075 M

Mole = Molarity x Volume

Mole of Mg(CN)₂ = 0.075 × 0.275

Mole of Mg(CN)₂ = 0.020625 mole

Mole of Mg(CN)₂ = 0.020625 mole

Molar mass of Mg(CN)₂ = 24 + 2(12 + 14) = 76 g/mol

Mass = mole × molar mass

Mass of Mg(CN)₂ = 0.020625 × 76

Mass of Mg(CN)₂ = 1.57 g

Therefore, 1.57 g of Mg(CN)₂ is needed to prepare the solution

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Answer: D

Explanation:

Answer:

the question to your answer to your question omnivores.

Explanation:

Answer:

1 mole is equal to 1 moles Copper(II) Oxide, or 79.5454 grams. Note that rounding errors may occur, so always check the results.

Explanation:

The empirical formula is CH3O2

What is a empirical formula ?

An empirical formula tells us the relative ratios of different atoms in a compound. The ratios hold true on the molar level as well. Thus, H2O is composed of two atoms of hydrogen and 1 atom of oxygen. Likewise, 1.0 mole of H2O is composed of 2.0 moles of hydrogen and 1.0 mole of oxygen

Explanation:

From The question, number of moles of CO2= 4.89/44=0.111mol

Number of moles of H2O=3/18= 0.1667moles

Since 1mole of CO2 contains 1mole of carbon and 2 moles of O2,

Implies that there 0.111 moles of C and 0.222moles of O2

Similarly also 0.1667moles of water contains 2 moles of H2 hence = 0.333 moles of H2

Dividing by smallest number= 0.111mol

For C = 0.111/0.111= 1

For H = 0.333/ 0.111= 3

For O = 0.222/0.111= 2

Hence the empirical formula= CH3O2

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Answer:

combination, decomposition, single-replacement, double-replacement, and combustion.

Explanation:

In water, the best nucleophile among the given options is I- (iodide ion).

A nucleophile is a species that donates a pair of electrons to form a new chemical bond. Iodide ion has a larger size compared to chlorine ion (Cl-), which results in a more diffuse negative charge. This increased electron density enhances its nucleophilicity.

Additionally, the larger size of iodide ion reduces the strength of its ionic bond with hydrogen, making it a better leaving group. CH3SCH3 (dimethyl sulfide) and CH3OCH3 (dimethyl ether) are organic compounds and do not exhibit significant nucleophilic behavior in water.

Therefore, I- is the strongest nucleophile among the given options in an aqueous environment.

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The main answer is that the compound with a six carbon chain and a ketone on carbon 4 will not form a yellow precipitate when treated with excess iodine in the presence of NaOH.

that the yellow precipitate formed in this reaction is due to the presence of an alpha-beta unsaturated carbonyl compound, which can undergo a reaction with iodine and NaOH to form iodoform. However, the compound with a ketone on carbon 4 does not have an alpha-beta unsaturated carbonyl group, so it will not react with iodine and NaOH to form a yellow precipitate.

out of the given options, only the compound with a six carbon chain and a ketone on carbon 4 will not form a yellow precipitate when treated with excess iodine in the presence of NaOH.

The compound(s) that will not form a yellow precipitate when treated with excess iodine in the presence of NaOH are: a five carbon chain with a ketone on carbon 3 and a six carbon chain with a ketone on carbon 4.
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: When treated with excess iodine in the presence of NaOH, compounds that contain methyl ketones (RC(O)CH3) will undergo the iodoform reaction, which produces a yellow precipitate of iodoform (CHI3). In this case, the compounds with ketones on carbon 2 (both five and six carbon chains) contain methyl ketones, so they will form a yellow precipitate. However, the five carbon chain with a ketone on carbon 3 and the six carbon chain with a ketone on carbon 4 do not contain methyl ketones and will not form a yellow precipitate.

Based on the structures provided, the compounds that will not form a yellow precipitate in the reaction with excess iodine and NaOH are those with a ketone on carbon 3 in a five carbon chain and a ketone on carbon 4 in a six carbon chain.

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Beside information on chemical concentration add water temperature, water pressure should also be posted on dish washing machines.

Temperatures for dishwashers  are fixed by the manufacturer to make sure it’s the most efficient that it can be. An average dishwasher temperature runs its main cycle at about 130-140°F.1 This is because the temperature of water in the dishwasher needs to be hot enough to ensure that the detergent is fully dissolved and activated, while also dislodging any leftover food and grease. During the rinse phase, the water is heated to slightly higher temperatures of up to 180°F to make sure the dishes are safe to eat from.2 The high heat water also helps with the drying as the dishes will be warm

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Answer:

336

Explanation:

L x w x h= 6 x 7 x 8 = 336

Answer:

The human body organs are of different types and can be grouped into sections like Of Digestion: Esophagus, Stomach, liver, pancreas, small intestine, large intestine, rectum, and anus. Respiration: Lungs, nose, trachea, bronchi.