The relative formula mass (M) of a Group 2 metal carbonate is 197
Relative atomic masses (Ar): C = 12
O = 16
Calculate the relative atomic mass (Ar) of the Group 2 metal in the metal carbonate
Name the Group 2 metal.​

2 C2H6 + 7 O2 → 6 H2O + 4 CO2 If you start with 5.20 moles of C2H6, 10.4 moles of H2O will produce.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

5.20 moles of ethane × 4 moles of carbon dioxide / 2 mole of ethane

= 5.20 × 4 / 2

= 10.4 moles

Thus, If you start with 5.20 moles of C2H6, 10.4 moles of H2O will produce.

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Answer:

C. N₂O₄ → N₂ + 2O₂

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define

N₂O₄ decomposes into N₂ and O₂

Step 2: RxN

Unbalanced RxN:   N₂O₄ → N₂ + O₂

Balanced RxN:   N₂O₄ → N₂ + 2O₂

Rutherford conducted a famous experiment called the gold foil experiment.

He took a skinny sheet of gold foil. He used a special gadget to shoot alpha particles undoubtedly charged debris on the gold foil. most debris passed straight thru the foil like the foil was now not there. They bombarded very skinny sheets of gold foil with fast-shifting alpha debris. Rutherford found that a small percent of alpha debris had been deflected at massive angles, which could be explained by using an atom with a very small, dense, definitely-charged nucleus at its middle.

Rutherford designed an experiment to apply the alpha particles emitted via a radioactive element as probes to the unseen global atomic structure. If Thomson changed into correct, the beam might move immediately through the gold foil. most of the beams went via the foil, however, some have been deflected. Ernest Rutherford postulated the nuclear structure of the atom, determined alpha and beta rays, and proposed legal guidelines for radioactive decay. In 1911, Rutherford, Marsden, and Geiger determined the dense atomic nucleus by bombarding a thin gold sheet with the alpha particles emitted through radium.

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the number of hydroxyl groups increases is caused by a greater degree of hydrogen bonding between the molecules.

I hope this helps

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer

V = 123.3 L

Explanation

Given:

mass of H2 = 11.1 g

At STP

Required: Volume of H2

Solution

At STP 1 mole =22.4 L

Step 1: Calculate the number of moles of H2

n = m/M

n = 11.1g/2.016g/mol

n = 5.5 mol

Step 2: Calculate the volume

1 mole =22.4 L

5.5 mole = x liters

V = 123.3 L

Explanation:

500 degree Celsius because we can see it in the tube

A factorial-study is a research design in which two or more independent variables, referred to as factors, are manipulated by the researcher to examine their individual and combined effects on the dependent variable.

In the case of a factorial study that is purely research design, both factors are true independent variables, meaning they are under the direct control of the researcher and can be manipulated in a controlled manner.

The main objective of a factorial study is to investigate how the independent variables interact with each other and influence the dependent variable.

By manipulating multiple factors simultaneously, researchers can examine the unique effects of each factor as well as their combined effects.

The design of a factorial study involves creating different experimental conditions by systematically varying the levels of each factor.

This results in multiple treatment combinations, allowing researchers to analyze main effects (the influence of each factor individually) and interaction effects (the combined influence of multiple factors).

C helping researchers understand how different factors contribute to observed outcomes.

The results obtained from a factorial study can contribute to theory development, practical applications, and further research in the field.

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Answer:

Mitosis

Explanation:

The amount of energy required to raise the temperature of a 53.5 g sample of gold from 23.0 °C to 100.0 °C is 14.5 kJ. We will use the following formula for calculating the energy required to raise the temperature of a substance: Q = m × c × ΔTwhereQ = energy m = mass c = specific heat capacityΔT = change in temperature We are given: m = 53.5 g c = 0.0308 cal /g°CΔT = (100.0 - 23.0) = 77.0 °C (Note that we have converted the temperature difference from Celsius to Kelvin, as the unit of specific heat used in the formula is Joule per Kelvin.)

Now, we will substitute the given values into the formula and solve for Q:Q = 53.5 g × 0.0308 cal/g°C × 77.0°C= 123.93 cal

Next, we will convert the unit of energy from calories to kilojoules:1 cal = 4.184 J (definition)1 kJ = 1000 J

Therefore,1 cal = 4.184/1000 kJ1 cal = 0.004184 kJHence,123.93 cal = 123.93 × 0.004184 kJ = 0.518 kJ

Therefore, the amount of energy required to raise the temperature of the gold sample from 23.0°C to 100.0°C is 0.518 kJ (to three significant figures).

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According to the given statement Dispersion, Dipole–Dipole, Hydrogen Bonding, and Ion-Dipole.

A molecule is the simplest unit of a molecule that keeps its content and properties. It is made up of two or maybe more atoms that are joined together by chemical bonds. Chemistry is built on molecules. The element name and a subscript indicating the number more atoms are used to identify molecules.

Molecular function refers to processes that take place at the molecular level, such as catalysis or binding. GO molecular function words do not describe the location, timing, or context of an action; rather, they indicate activities rather than the objects (molecules or complexes) that carry them out.

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Taking into account the definition of molarity,  the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liters}\).

In this case, you have:

Replacing in the definition of molarity:

\(Molarity=\frac{30 moles }{0.80 L}\)

Solving:

Molarity= 37.5 \(\frac{moles}{liters}\)

Finally, the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).

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Calcium carbonate (CaCO₃) is the compound in marble that is destroyed by acid rain.

The compound in marble that is destroyed by acid rain is calcium carbonate (CaCO₃). Acid rain contains acidic substances, such as sulfuric acid (H₂SO₄) and nitric acid (HNO₃), which react with the calcium carbonate in marble, causing it to dissolve and break down.

Marble is primarily composed of calcium carbonate, which gives it its characteristic appearance and properties. Acid rain, which is rainwater with a lower pH due to the presence of acidic gases like sulfur dioxide and nitrogen oxides, can cause significant damage to marble surfaces over time.

So the answer is Calcium carbonate (CaCO₃) is the compound in marble that is destroyed by acid rain.

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Answer:Air is a solution made up of many gases. ... There is more nitrogen than any other gas in air, so it is considered the solvent in an air solution.

Explanation:

Before starting a titration equation, we need to find the pH of this initial solution.

Titration is a method of chemical analysis where the quantity of a sample's constituents is determined by adding a precisely measured amount of a different substance to which the desired ingredient will react in a specific, known proportion. A burette, which is simply a long, graduated measuring tube with a stopcock and a delivery tube at its bottom end, is used to gradually administer a standard solution of titrating reagent, or titrant, to a specified concentration. When the equivalence point is achieved, the addition is terminated.

An exact comparable quantity of titrant has been applied to the sample at the equivalence point of a titration. The end point is the experimental point at which a signal indicating the end of the reaction appears. The indicator's colour changing or a change in an electrical characteristic that is being monitored throughout the titration can both serve as this indication. The titration error, which is the difference between the end point and the equivalence point, is minimised by selecting an appropriate end-point signal and a technique for detecting it.

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Answer:

one atom of carbon dioxide and two atoms of oxygen = CO2

hope this answer will help you

Answer:

nitrogen because it has less number of protons and electrons, thus a samller atomic mass

Explanation:

Explanation:

So,

There's an equation that we could use in order to find frequency, and it is the next one:

This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.

In this problem, we know the value of E and the value of h, so we need to solve for v:

Therefore, the correct answer option is A.

Each fluorine atom possesses seven valence electrons, compared to six for sulphur. This molecule likewise carries a positive charge. There will be 5 electron domains in this ion because each sulphur atom will form a single bond with a fluorine atom. As indicated below, the molecular geometry will be triagonal bipyramidal.

How are electron domains and molecular geometries determined?

To reduce repulsion, arrange the electron domains around the centre atom. The total number of electron domains is counted. To ascertain the molecular geometry, consider the angular configuration of the chemical bonds holding the atoms together. Remember that a bond with several atoms (such as a double or triple bond) counts as one electron domain.

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Molar mass

No of moles

Volume

The question is incomplete, the complete question is;

As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).

Answer:

CORRECT because IT IS REORTED TO THE NEAREST MILLIGRAM

Explanation:

In mathematics, values may be rounded up or down as required. In the case of this measurement of cereals by Danny, it is customary to measure the amount of iron per serving to the nearest milligram.

As such, even though Danny found out that the actual amount of iron per serving in the cereal is 4.6 milligrams, the value reported on the cereal box is still correct because it was reported to the nearest milligram hence the value had to be rounded up.

Answer:

C) Why are children happ when they get home from school

Explanation:

Reduction of which coenzyme involves a hydride is NAD⁺

Coenzyme is the organic compound require by many enzymes for catalytic activity and NAD⁺ is a coenzyme that mediated the redox reaction through a transfer of electron between NAD⁺ and is oxidized form and NADH and NADPH is the reduced form and serve as hydride donor that is reducing agent and NAD⁺ is called as nicotinamide adenine dinucleotide and hydride transfer play a crucial role in a multitude or biological redox reaction and are mediated by flavin and a deazaflavin or nicotinamide adenine dinucleotide cofactor at standard redox potential ranging from 0 to -340 mV

Coenzymes are relatively small organic molecule often derived from vitamins and some are reactant in enzyme catalyst reaction while other are essential part of many enzymes and coenzymes are often important in enzymes carrying out oxidation or reduction reaction and they may participate as electron carrier

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Answer:

magnesium+ hydrochloric acid is the reactants

Explanation:

the reactants are always in the left and the products are always in the right by

magnesium+hydrochloric acid ⇒ magnesium chloride + hydrogen

by combining magnesium and hydrochloric acid it produces magnesium chloride and hydrogen.

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The column separating range is from 30-200 kDa is suitable for separating a mixture of five proteins.

Based on the given options and the molecular weights of the proteins, the most suitable column for separating the mixture of five proteins would be:

(a) the column separating range is from 30-200 kDa

Here's why:

(a) covers a wide range of molecular weights, including four of the five proteins (150kDa, 100kDa, 75kDa, and 50kDa). The only protein not within this range is the 300kDa protein.
(b) covers a narrower range and would only be able to separate three of the proteins (100kDa, 75kDa, and 50kDa).
(c) has an even narrower range and would only be able to separate one protein (150kDa).

Therefore, option (a) is the most suitable column for separating the mixture of proteins as it includes the largest number of proteins within its separating range.

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Option (b) with a column separating range of 30-120 kDa would be suitable for separating the mixture of five proteins with molecular weights ranging from 50-300 kDa, as it covers the entire range of the proteins' molecular weights.

It would be possible to separate a combination of five proteins with molecular weights of 300kDa, 150kDa, 100kDa, 75kDa, and 50kDa using option (b) with a column separating range of 30-120 kDa. This is due to the column range's coverage of all the molecular weights in the mixture, which enables the separation of each protein according to its size. Option (a) with a 30-200 kDa column range is too broad, which might lead to poor resolution and insufficient protein separation. Option (c), which exclusively separates the biggest protein while leaving the lesser proteins unresolved, has a range of 130–200 kDa, which is too small. Therefore, the best option for separating this mixture of proteins is (b).

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Answer: option c) the strongest base in aqueous solution is NaOH

Explanation:

the strongest base in aqueous solution is NaOH because strength of a base is determined by its ability to donate hydroxide ions (OH-) in solution. and NaOH dissociates completely in water to produce Na+ and OH- ions. The presence of a fully dissociated hydroxide ion makes NaOH a strong base.

While, HOC2H4OH and CH3OH are weak acids. HOC2H4OH is ethylene glycol and CH3OH is methanol are weak acid due to the presence of the   (-OH) group.

Also, NH3 (ammonia), is a weak base though it can accept H⁺ to form NH4+

Answer:

the answer is a

Explanation:

Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.

If one electron is removed from sodium during a reaction energy level becomes the valence shell is outermost shell

Electrons are the smallest of the particles that make up an atom, and they carry a negative charge a neutral sodium atom is likely to achieve an octet in its outermost shell by loosing its one valence electron the cation produce in this way is Na⁺ is called as sodium ion distinguish it from element and the outermost shell of sodium ion is the second electron shell which has eight electrons in it

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Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.