the color change of a chemical indicator requires an overtitration of 0.02 ml. calculate the percent relative error if the total volume of titrant is 60.00 ml.

The average rate of the reaction over the first 450 seconds -2.2×10⁻³ M/s

Speed is defined as the rate of change of the distance moved with time. Mathematically, it can be expressed as:

Speed = distance / time

With the above idea, we can obtain the rate of the reaction as illustrated below:

Rate = Change in concentration / time

Rate = -1 / 450

Rate = -2.2×10⁻³ M/s

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D is correct for number 2. i just finished

explanation; i got it right

The reaction will occur as Bromine is more reactive and can replace Iodine.

The reactivities of the halogens generally decrease down the group ( At < I < Br < Cl < F). This is due to the fact that atomic radius increases in size down the group, with an increase of electronic energy levels. This usually lessens the attraction for valence electrons of other atoms, decreasing reactivity of the halogens.

Fluorine is the most reactive element of group 17 due to its small size, electro negativity, extremely high oxidizing power and also low dissociation enthalpy of the F-F bond.

When a reaction takes place between Sodium bromide and Iodine, this reaction will take place without any difficulty because the reactivity of Bromine is greater than Iodine and hence it can replace the iodine.

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Answer:

66124.8 J

Explanation:

Using the formula;

Q = m × cp × ∆T

Where;

Q = change in heat (J)

m = mass of substance (g)

cp = specific heat capacity (4.184 J/g°C)

∆T = change in temperature (°C)

According to this question,

Q = ?

m = 54.31 grams

∆T (final - initial temperature) = 438°C - 147°C = 291°C

cp = 4.184 J/g°C

HENCE,

Q = m × cp × ∆T

Q = 54.31 × 4.184 × 291

Q = 66124.8 J

In an acid-base titration, the primary standard is a. neither an acid nor a base

The process of analyzing the concentration of an unknown acid or base solution is called titration. A burette is used to accurately measure the volume of a solution. It is critical to use a primary standard in this titration process. A primary standard is a highly pure chemical reagent that has a precisely known molar mass and can be easily stored without decomposing.

A primary standard is a chemical that is neither an acid nor a base. It is either a highly pure acid or a highly pure base. The concentration of a solution can be determined using primary standards since they have a precisely known concentration. Acid-base titrations are an excellent way to determine the concentration of an unknown acid or base solution. As a result, primary standards are required to conduct acid-base titrations.

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We can conclude that each carbon atom in acetylene shares one pair of electrons with the hydrogen atom and three pairs with the other carbon atom.

A chemical bond is a long-lasting attraction between atoms or ions that allows molecules and crystals to form. Ionic bonds are formed by the electrostatic force between oppositely charged ions, whereas covalent bonds are formed by the sharing of electrons.

Each carbon atom in acetylene shares one pair of electrons with the hydrogen atom and three pairs with the other carbon atom.

The carbon atom contains four electrons. It requires four electrons to become stable in its outermost shell. Two carbon atoms covalently bond three pairs of electrons with each other in acetylene, and the remaining pair covalently bonds with two hydrogen atoms.

As a result of the carbon and hydrogen atoms becoming more stable, we can conclude that in acetylene, each carbon atom shares one pair of electrons with the hydrogen atom and three pairs with the other carbon atom.

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kts-rtya-rjk

thora bored hoon koi ladki hai

plz aa jao

Answer:

10.58km

The formula needed to calculate the amount of wire used is expressed as:

W is the weight of wire used to wind a magnet

wg is the weight of wire per km

Given the following parameters:

Substitute the given parameters into the formula to have:

Hence the length of wire used is 10.58km

The molar volume of Ne gas will be 21.44 L.

We know that, according to Ideal Gas law:

PV = nRT

Where,

P = pressure, V = volume, n = no. of moles of gas, R = gas constant,

T = temperature

On the other hand,

D = PMb/RT ...1

Where, D = density, Mb = molar mass

PV = nRT can also be written as V = n(RT/P) ....2

From equation 1, we can find RT/P which is equal to Mb/D

So, RT/P = Mb/D

Now put this value in equation 2

Therefore, V = n(Mb/D) ......3

V = Vm = molar volume

n = 1 mole

molar mass, Mb of Ne is 20.180gm

density, d is given 0.941g/l

Now on putting all the values in equation 3, we get:

Vm = n(Mb/D)

Vm = 1(20.180/0.941)

Vm = 21.44 L

Therefore, molar volume of Ne gas will be 21.44 L.

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The entire reaction of 2.40 g of C solid at STP results in 4390 mL of CO gas.

The definition of an ideal gas is a gas in which the volume of the molecules and the forces between the molecules are so minimal as to not affect the behavior of the gas.

What is a good example of a gas. Numerous gases, including nitrogen, oxygen, hydrogen, noble gases, some heavier gases like carbon dioxide, and mixtures like air, can be classified as ideal gases if certain parameters are kept within reasonable limits over a wide range of temperatures and pressures.

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There will be 3 H NMR signals for 2-chloro-3-methyl-2-butene.

The variety of protons present in a molecule is represented by the number of NMR signals. The illustration we used to explain NMR spectroscopy is as follows: Five signals on the spectrum signify five different types of protons. can be calculated simply by counting the number of unique hydrogens on one side of the symmetry plane. Nuclear magnetic resonance is used in proton nuclear magnetic resonance (1H NMR, proton NMR, or hydrogen-1 NMR), which uses hydrogen-1 nuclei within a substance's molecules to determine the structure of those molecules. Using NMR technique one can analyze the molecular structure of a molecule by observing the nuclear spins in electric field.

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The data can show us that X ,Y and Z are all esters

The law of definite proportions, also known as Proust's Law, states that a given chemical compound always contains the same elements in the same proportion by mass.

This means that no matter how a compound is obtained or prepared, its elemental composition will always be the same. For example, water is always composed of hydrogen and oxygen in a ratio of 2:1, regardless of its source or method of preparation.

The law of definite proportions is a fundamental principle of chemistry and provides evidence for the atomic theory of matter.

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The strongest acid in the list is b. HClO3, also known as chloric acid.

To select the strongest acid from the list provided, which includes a. HBrO, b. HClO3, c. HBrO2, d. HClO2, and e. HIO, we can compare their acidic strengths:

To determine acidic strength, we can look at the pka values of each option:

pka value for HBrO = 8.55

pka value for HClO3 = -1.00

pka value for HBrO2 = 4.92

pka value for HClO2 = 7.60

pka value for HIO = 11

Lower the pka value, more is the acidic strength and hence , stronger the acid is. From above written values, we can infer that the lowest pka value is -1.00 and that corresponds to HClO3 i.e, Chloric Acid.

Hence, the strongest acid in the list is b. HClO3, also known as chloric acid.

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The statement, that describes the appropriate number of significant figures is "11.345."

Significant figures represent figures of value that have relevance in terms of measuring resolution. In positional notation, significant figures are digits in a number that are dependable and necessary to express the quantity of something.

The quantity of digits in a measurement, usually a measurement, that contribute to the value's accuracy.

Significant figures

= 15.225 - 3.88

= 11.345

It has 5 significant figures.

Hence the correct answer is 11.345.

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In the lab, you have a 100g piece of iron that is heated to 80°C. If you carefully drop this piece of iron into a beaker containing 100mL of water, a heat transfer process will occur. The iron, being at a higher temperature than the water, will transfer its heat energy to the water until thermal equilibrium is reached.

The amount of heat transferred can be calculated using the formula:

Q = mcΔT,

where Q is the heat transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

To calculate the heat transferred in this case, you need to know the specific heat capacity of iron and water. Iron has a specific heat capacity of 0.45 J/g°C, while water has a specific heat capacity of 4.18 J/g°C.

Using the formula, the heat transferred can be calculated as follows:
Q = (100g)(0.45 J/g°C)(80°C - initial temperature of iron)

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Answer:

A.

Explanation:

Miners were happy due to the result of the gold rush. they labored very hard for very little profit. Working in the Yukon Territory was not safe. To reach it, the ground had to be dug. Then the dirt had to be removed to get the gold.

In paragraph 2, what does the phrase "miners of all shapes and sizes" mean that many people were invited. This included food, clothing, transportation equipment, etc.

Answer:

I think it's A but I might be wrong

Explanation:

Hard water is not typically caused by the concentration of dissolved oslolum (assuming you meant "solutes") but rather by the presence of high concentrations of dissolved minerals, such as calcium and magnesium ions

The net ionic equation for the formation of calcium carbonate (CaCO3) is as follows:

Ca2+ (aq) + CO32- (aq) → CaCO3 (s)

In this equation, the calcium ions (Ca2+) from the dissolved calcium compounds in hard water react with carbonate ions (CO32-) to form insoluble calcium carbonate precipitate (CaCO3), which appears as a white solid. The precipitation occurs because the solubility product of calcium carbonate is exceeded, resulting in the formation of a solid.

The formation of a precipitate is driven by the principle of solubility. When the concentration of a dissolved compound exceeds its solubility limit, the excess ions come together and form a solid. In the case of hard water, when the concentration of calcium ions and carbonate ions surpasses their respective solubility limits, calcium carbonate precipitate forms.

Regarding the replacement of calcium ions with sodium ions, if calcium ions were replaced with sodium ions in the net ionic equation, the reaction would be different. Sodium ions (Na+) do not form insoluble compounds with carbonate ions, and sodium carbonate (Na2CO3) is soluble in water.

In summary, the formation of calcium carbonate precipitate in hard water is driven by the reaction between calcium ions and carbonate ions, leading to the exceeding of the solubility product and subsequent precipitation. If calcium ions are replaced with sodium ions, no precipitate would form as sodium carbonate remains soluble in water.

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Answer:

172.385 g/mol

Explanation:

Magnesium Tartrate is C4H4MgO6

C - 12.01 g/mol

H - 1.01 g/mol

Mg - 24.305 g/mol

O - 16.00 g/mol

12.01(4) + 1.01(4) + 24.305 + 16(6) = 172.385 g/mol

Answer:

172.38

Explanation:

\(C_4H_4MgO_6\\C=12.01\\H=1.01\\Mg=24.30\\O=16.00\\\\4(12.01)+4(1.01)+24.30+6(16.00)\\48.04+4.04+24.30+96\\=172.38\)

C = 12.01

H=1.01

Mg=24.30

O =16.00

4(12.01)+4(1.01)+24.30+6(16.00)

48.04 +4.04+24.30+96

=172.38

Answer:

5.77 x 10¹⁴ Hz

Explanation:

Glucose in urinalysis  measures the amount of glucose in your urine. It may be used as a screening test for diabetes.

Normally, urine contains very little or no glucose. But if you have too much glucose in your blood, your kidneys will get rid of some of the extra glucose through your urine. So, a high level of urine glucose may mean that your blood glucose is usaully high, too, and that could be a sign of diabetes. If your urine glucose level is high, your health care provider will usually order a blood glucose test to help make a diagnosis.

Glucose in urine test measures the amount of glucose in your urine. Glucose is a type of sugar, that is the main source of energy for the cells in your body. Your blood carries glucose to your cells.

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The Big Bang theory claims that hydrogen was the first element to form.

Atomic number 1 and the letter H are used to identify the chemical element hydrogen. In the cosmos, it makes up around 75% of the elemental mass and is the lightest and most prevalent element. At room temperature and pressure, hydrogen is a colorless, tasteless, odorless gas that is non-toxic.

The Big Bang theory claims that hydrogen was the first element to form. The universe was made of a hot, dense plasma of protons, neutrons, and electrons in the initial moments following the Big Bang. These particles merged when the cosmos cooled and expanded to create hydrogen atoms, which subsequently fused to create the first stars. Helium, carbon, oxygen, and other atoms that make up the universe we see today were converted into heavier elements through nuclear fusion in these stars.

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Explanation:

Electronic Configuration of First 30 Elements with Atomic Numbers

Atomic Number Name of the Element Electronic Configuration

18 Argon (Ar) [Ne] 3s2 3p6

19 Potassium (K) [Ar] 4s1

20 Calcium (Ca) [Ar] 4s2

21 Scandium (Sc) [Ar] 3d1 4s2

26 more rows

Explanation:

NUMBER ELEMENT ELECTRON CONFIGURATION

1 Hydrogen 1s1

2 Helium 1s2

3 Lithium [He]2s1

4 Beryllium [He]2s2

5 Boron [He]2s22p1

6 Carbon [He]2s22p2

7 Nitrogen [He]2s22p3

8 Oxygen [He]2s22p4

9 Fluorine [He]2s22p5

10 Neon [He]2s22p6

11 Sodium [Ne]3s1

12 Magnesium [Ne]3s2

13 Aluminum [Ne]3s23p1

14 Silicon [Ne]3s23p2

15 Phosphorus [Ne]3s23p3

16 Sulfur [Ne]3s23p4

17 Chlorine [Ne]3s23p5

18 Argon [Ne]3s23p6

19 Potassium [Ar]4s1

20 Calcium [Ar]4s2

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

Option C. 2000 cm³.

Explanation:

We'll begin by calculating the number of mole in 2 g of Mg. This is illustrated below:

Molar mass of Mg = 24 g/mol

Mass of Mg = 2 g

Mole of Mg =?

Mole = mass /Molar mass

Mole of Mg = 2/24

Mole of Mg = 8.33×10¯² mole.

Next, we shall determine the number of mole of H2 produced from the reaction. This is illustrated below:

Mg(s) + 2H^+ (aq) —› Mg^2+(aq) + H2 (g)

From the balanced equation above,

1 mole of Mg reacted to produce 1 mole of H2.

Therefore, 8.33×10¯² mole of Mg will also produce 8.33×10¯² mole of H2.

Finally, we shall determine the volume of H2 produced. This is illustrated below:

1 mole of H2 occupy 24000 cm³ at room temperature and pressure.

Therefore, 8.33×10¯² mole of H2 will occupy = 8.33×10¯² x 24000 ≈ 2000 cm³ at room temperature and pressure.

Therefore, 2000 cm³ of H2 were obtained from the reaction.

Answer:

Hydroelectricity, or hydroelectric power, is electricity produced from hydropower. In 2015, hydropower generated 16.6% of the world's total electricity and 70% of all renewable electricity, and was expected to increase by about 3.1% each year for the next 25 years.

Explanation:

Answer:

The electricity which is produced from flowing water or from the force exerted by the flowing water is called Hydroelectricity..

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ANSWER:

They contain two or more elements in fixed ratio to each other

Explanation:

A compound is a substance formed when two or more chemical elements are chemically bonded together. The type of bonds holding elements together in a compound can vary. Two common types are covalent bonds and iconic bonds. The elements in any compound are always present in fixed ratios.

Answer:

Let's start with the fact that cereals , are made of grains and are mostly carbohydrates. therefore they contain carbon oxygen and hydrogen. They also contain proteins so have nitrogen. Plants have the minerals that are in the soil where they grow, so the list you have is correct. They also generally have added vitamins ad minerals. The vitamins contain C, H, O N, and a few others such as sulfur, The added minerals might contain:copper, iron, zinc, cobalt, selenium, silicon and molybdenum .

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The three elements present in the ingredients of the cereal drink which are not listed in the nutrition facts are Iron, Calcium, and Zinc

Cereals are monocotyledonous grass crops cultivated annually for the purpose of consumption. They are rich in fiber and energy. Examples of them include;

Cereal drinks are processed drinks extracted from cereal crops through fermentation. They are rich in nutrients as they contain important sources of carbohydrates, dietary protein, and vitamins.

The ingredients present in a cereal drink are composed of essential elements such as:

Some of which are not listed in the nutrition facts are Iron, Calcium, and Zinc.

Therefore, we can conclude that the elements present in the ingredients of the cereal drink which are not listed in the nutrition facts can be Iron, Calcium, and Zinc.

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Answer: 1s22s22p63s23p6.

Explanation:Therefore the Argon electron configuration will be 1s22s22p63s23p6. Because the third energy level has eight electrons and is therefore full (3s23p6) it is called a noble gas.