Use the periodic table to determine each of the following:The number of 3s electrons in Mg.The number of 3d electrons in Cr.The number of 4d electrons in Mo.The number of 6p electrons in Pb.

Phosphorous and nitrogen are the chemical compound that can cause algal blooms and cultural eutrophication in streams.

The cultural eutrophication is the natural aging process of aquatic ecosystems over time. Cultural eutrophication is the human-caused acceleration of aging usually resulting from increased nutrient input. This results in algal blooms, which in marine environments may cause red tides and dead zones. Eutrophication is characterized by excessive plant and algal growth due to the increased availability of one or more limiting growth factors needed for photosynthesis such as sunlight, carbon dioxide, and nutrient fertilizers. Eutrophication occurs naturally over centuries as lakes age and are filled in with sediments. human activities have accelerated the rate and extent of eutrophication through nitrogen and phosphorus, into aquatic ecosystem.

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N2(g) + 3H2-> 2NH3(g)  This is the balanced equation

Note the mole ratio between N2, H2 and NH3.  It is 1 : 3 : 2  This will be important.

moles N2 present = 28.0 g N2 x 1 mole N2/28 g = 1 mole N2 present

moles H2 present = 25.0 g H2 x 1 mole H2/2 g = 12.5 moles H2 present

Based on mole ratio, N2 is limiting in this situation because there is more than enough H2 but not enough N2.

moles NH3 that can be produced = 1 mole N2 x 2 moles NH3/mole N2 = 2 moles NH3 can be produced

grams of NH3 that can be produced = 2 moles NH3 x 17 g/mole = 34 grams of NH3 can be produced

sorry if this isn't the right answer

Answer:

Explanation:

amine is a rapper A+?

The relative atomic mass of Mg is 24.3, the relative atomic mass of S is 32.1, and the relative atomic mass of O is 16.0.

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The Lewis Structure for [tex]SeBr_{2}[/tex] is shown below.

b) The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.

a) There are 20 total valence electrons that can be used to draw the [tex]SeBr_{2}[/tex] Lewis structure. It has a bent molecular structure and a tetrahedral electron structure. The Lewis structure has 16 non-bonding electrons in addition to 4 bonding electrons. The bond angle is shorter than 109.5 degrees, and it hybridizes with [tex]SP^{3}[/tex].

d) Number of bonds made by central atom is 2.

e) Number of unshared electron pair by central atom is 2.

rest all parts are in the image.

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The chemical name for fernic carbonate is [Fe 2 (CO 3) 3]. The substance also known as iron (III) carbonate.

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Give the chemical names for the following ionic compounds.

part 3: Fe2(CO3)3

pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. The pH of water is a crucial indicator of the purity of the water.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7.

In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water. While water with more free hydroxyl ions is basic, water with more free hydrogen ions is acidic. 

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100ml of 0.200M NaOH is needed to react completely with 2.54g iodine.

No. of moles of iodine = wt. of iodine/ its molar mass.

⇒ no. of moles of iodine = 3.45 / 254 = 0.01 mol.

According to the given equation, NaOH reacts with I₂ in 2: 1 ratio.

∴ No. of moles go NaOH = 0.01 x 2 = 0.02 mol

We know that Molarity = no. of moles of solute / Vol. of solution (in L)

⇒ Vol. of solution = no. of moles (of NaOH) / Molarity

⇒ Vol. of solution = 0.02 / 0.2 = 0.1 L or 100 ml.

Molar Concentration or Molarity is defined as the number of moles of solute present in a definite number of liters of the solution, that is, moles per liters of a solution.

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According to concept of Avogadro's number, there are 14.33×10⁴⁶ moles in 2.38×10²³ atoms of Fe₂O₃.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number, thus number of moles= 2.38×10²³×6.023×10²³=14.33×10⁴⁶ moles.

Thus,  there are 14.33×10⁴⁶ moles in 2.38×10²³ atoms of Fe₂O₃.

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It is impossible to accurately answer this question because clouds are constantly changing shape and size and are in a constant state of flux. In addition, clouds depend heavily on environmental and weather conditions which can vary drastically between different parts of the world.

However, hypothetically:

Assuming the average-sized cloud is a cumulus cloud 5 km in diameter, it would take approximately 6.7 million clouds to reach 100% sky coverage across the entire earth.

The diameter of the Earth is approximately 12,756 km. The surface area of the Earth is approximately 5.10 x 10^8 km^2

We need to calculate the area of the Earth that can be covered by 6.7 million clouds.

The area of each cumulus cloud is approximately 19.6 km^2

The total area of 6.7 million clouds would be:

6.7 million clouds x 19.6 km^2 = 131,520,000 km^2

To cover the entire surface area of the Earth, we will need a total of 131,520,000 km^2 / 5.10 x 10^8 km^2 = 2.58 x 10^-2 or 2.58% sky coverage.

Therefore, to cover the entire sky of the Earth with average-sized clouds, it would take approximately 6.7 million clouds.

A. The molality of the 2.50 M NaCl solution (density of solution = 1.08 g/mL) is 2.68 M

B. The molality of the 48.2% KBr solution is 7.819 M

We'll begin by obtaining the mass of the solution. Details below:

Mass = Density × volume

Mass of solution = 1.08 × 1000

Mass of solution = 1080 g

Next, we shall obtain the mole of NaCl. Details below:

Mole = Molarity × volume

Mole of NaCl = 2.5 × 1

Mole of NaCl = 2.5 moles

Finally, we shall determine the molality of the solution. Details below:

Molality = mole / mass of water (in Kg)

Molality of solution = 2.5 / 0.93375

Molality of solution = 2.68 M

The molality of the 48.2% KBr solution can be obtained as follow:

Molality = mole / mass of water (in Kg)

Molality of solution = 0.405 / 0.0518

Molality of solution = 7.819 M

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According to mole concept and Avogadro's number, there are 39.023×10[tex]^-[/tex]²⁰ moles in 235,000 molecules of methane gas and 298.90 moles in 1.81 x 10²⁶ molecules of water.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

As 1 mole=6.022×10²³ molecules, thus,235000 molecules=235000/6.022×10²³=39.023×10[tex]^-[/tex]²⁰ moles and  1.81 x 10²⁶ molecules of water=1.81 x 10²⁶ /6.022×10²³=298.90.

Thus, there are 39.023×10[tex]^-[/tex]²⁰ moles in 235,000 molecules of methane gas and 298.90 moles in 1.81 x 10²⁶ molecules of water.

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To solve this we must be knowing each and every concept related to lattice enthalpy. Therefore, MgO has a larger lattice energy since each ion contains two unit charges, whereas NaCl only carries one.

Lattice Enthalpy is indeed the enthalpy change caused by the synthesis of one mole of such an ionic compound out of its gaseous ions, while all other parameters stay constant.

Enthalpy is indeed the heat content, overall heat, or even a thermodynamic quantity proportional towards the internal energy of the system multiplied by the product of its pressure and volume. MgO has a larger lattice energy since each ion contains two unit charges, whereas NaCl only carries one.

Therefore, MgO has a larger lattice energy since each ion contains two unit charges, whereas NaCl only carries one.

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The percentage yield of the given chemical reaction is equal to 91.84 %.

The yield of reaction can be described as a measure of the amount of the product produced with respect to the amount of the reactant consumed, formed product in a chemical reaction, usually expressed as a percentage.

The percent yield can be described as a comparison between the actual yield and the theoretical yield based on the equation.

Given the theoretical yield of the reaction, = 28.1 g

The actual yield of the reaction = 25.9 g

The % yield of the reaction can be determined as:

Percent yield = (25.9/28.2) ×100

Percent yield = 91.84 %

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The strong electrolyte in the solution from the given option is FeCl₃. The FeCl₃ is the completely soluble , so it is strong electrolyte.

The strong electrolytes are the substances which is completely dissociates in to the ions . The dissociation of the strong electrolyte is shown by the arrow, that is pointed towards the products. The solution contains the free ions. The dissociation of the strong electrolyte equation is given below :

strong electrolyte(aq)   ----------->   cation⁺(aq)  +   anion⁻(aq)

The FeCl₃ will completely dissociates into the ions completely. Therefore, from the given the option the strong electrolyte is the  FeCl₃ .

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In the structure of 4-isopropyl-2,4,5-trimethylheptane, the primary hydrogens are located on the carbon atoms connected to the methyl groups (CH3). The secondary hydrogens are located on the carbon atoms connected to the isopropyl group (CH3-CH-CH2-). The tertiary hydrogens are located on the carbon atoms connected to the remaining methyl groups (CH3-CH2-CH3).

In an organic compound, the carbon atoms can be bonded to other carbon atoms or to hydrogen atoms. The number of other carbon atoms bonded to a particular carbon atom determines whether it is a primary, secondary, or tertiary carbon. A primary carbon is bonded to one other carbon atom, a secondary carbon is bonded to two other carbon atoms, and a tertiary carbon is bonded to three other carbon atoms. The hydrogens bonded to these different types of carbon atoms are referred to as primary, secondary, and tertiary hydrogens, respectively.

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lanthanides and actinides belong between A.the alkaline earth metals and the transition metals.

The inner transition elements lie between actinium (Z=89) and rutherfordium (Z=104), and between the elements lanthanum (Z=57) and hafnium (Z=72). The lanthanides are the elements 58 to 71 that follow lanthanum, and the actinides are the elements 90 to 103 that follow actinium. In fact, there is some debate over whether lanthanum and actinium should be regarded as components of transition metal group 3B, with the lanthanides and actinides, respectively, coming after them, or whether they should be regarded as the first elements of the lanthanides and actinides, with lutetium and lawrencium constituting Group 3B. Although the layout in the example above is more conventional, there seems to be a rising preference for the latter configuration.

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Answer:

Explanation:

To calculate the mass of sodium azide needed to fill a 48dm³ air bag with gas at r.t.p., you need to use the ideal gas law. The ideal gas law states that the pressure of a gas is directly proportional to its temperature (in Kelvins) and the number of moles of gas present, and inversely proportional to its volume. The ideal gas law can be expressed as:

PV = nRT

Where:

- P is the pressure of the gas

- V is the volume of the gas

- n is the number of moles of the gas

- R is the ideal gas constant

- T is the temperature of the gas

You can rearrange the ideal gas law to solve for the number of moles of gas present:

n = PV / RT

To solve this problem, you need to plug in the known values. At r.t.p., the pressure is 1 atm, the temperature is 273 K, and the volume is 48 dm³. The ideal gas constant is 8.31 J/mol*K. Plugging in these values, you get:

n = (1 atm * 48 dm³) / (8.31 J/mol*K * 273 K)

Solving for n, you get:

n = 0.0174 moles

Now that you have the number of moles of gas present, you can use the balanced chemical equation for the decomposition of sodium azide to calculate the number of moles of sodium azide needed. The balanced chemical equation is:

2 NaN3 (s) → 2 Na(s) + 3 N₂ (g)

This equation tells you that for every 2 moles of sodium azide that decompose, you get 3 moles of nitrogen gas. Since you need 0.0174 moles of nitrogen gas, you can divide that number by 3 to get the number of moles of sodium azide needed:

0.0174 moles N₂ / 3 moles N₂/2 moles NaN3 = 0.0087 moles NaN3

To convert the number of moles to mass, you need to know the molar mass of sodium azide. The molar mass of sodium azide is 65.01 g/mol. Plugging in the number of moles and the molar mass, you get:

0.0087 moles NaN3 * 65.01 g/mol = 0.5686 g NaN3

So, the mass of sodium azide needed to fill a 48dm³ air bag with gas at r.t.p. is approximately 0.5686 grams.

Michigan has changed over time in several ways such as geographically, demographically, and economically.

Geographically, the state has seen many changes. The glaciers have shaped the land, forming the Great Lakes and many of the rivers, and created the diverse topography that can be found in Michigan today.

Demographically, Michigan has seen a significant change in population over time. The state was first settled by Native American tribes and later by European settlers in the 18th century. In the late 19th century, immigrants from Europe came to Michigan to work in the growing automobile industry, leading to a diversification of the population.

Economically, Michigan has undergone many changes over time. Initially, the state's economy was based on agriculture, lumbering, and mining. However, the state's economy began to change in the late 19th century with the rise of the automobile industry and the growth of Detroit.

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The systematic name of this molecule is 4-((2-hydroxy-3-methoxybenzyl)amino)-N-(p-tolyl)benzamide.

1. First, the molecule should be broken down into its component parts: the amide group, the amino group, the benzene ring, the tolyl group, and the hydroxy-methoxybenzyl group.

2. The amide group is composed of an acyl group (the N-(p-tolyl)acetamide part) and an amine group (the N-(2-hydroxy-3-methoxybenzyl) part).

3. The acyl group is composed of an acyl chain (the p-tolyl group) and an acid group (the acetamide group).

4. The amine group is composed of an amino group (the 2-hydroxy-3-methoxybenzyl group) and an alkyl group (the N part).

5. The benzene ring is composed of a phenyl group (the benzene ring) and a substituent (the tolyl group).

6. Using this information, the systematic name of the molecule can be constructed. The systematic name is 4-((2-hydroxy-3-methoxybenzyl

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A)  2Al + 2KOH +6[tex]H_{2} O[/tex] ⇒ 2KAl (OH)₄ + 3H₂

B) 2KAl (OH) + H₂SO₄ ⇒ 2Al (OH)₃ + K₂SO₄ + 2 H₂O  

To balance the unbalance chemical equation:

Write the imbalanced chemical equation first to display the reactants and products in order to balance the chemical equation.

Secondly, note the number of atoms of each element on either side of the reaction arrow.

In order to equalize the number of atoms of each element on both sides of the equation, add coefficients (the numbers in front of the formulas). The oxygen and hydrogen atoms can be balanced most easily last.

Hence, we get the balance chemical equation.

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The shape of this is trigonal bipyramidal. By VSEPR arrangement the xenon atom present in Central and an oxygen is present in XeF₂O. The lewis structure attached below.

The primary atom in the hybridization of xenon difluoride is xenon (Xe). If we count the number of valence shells in Xe, there are two electrons in the 5s orbital and six in the 5p orbital, respectively. XeF₂O It will have a 5s2 5p6 electrical ground state configuration.

Although when it is stimulated, its configuration changes to 5s² 5p⁵ 5d¹. In total, the atomic orbitals of the xenon atom will undergo hybridization, yielding five sp3d hybrid orbitals in the excited state configuration (5s, 5py, 5px, 5pz, and 5dzx). Two-hybrid orbitals are produced by overlapping the two partially filled 2pz atomic orbitals of fluorine.

These orbitals are subsequently used to construct F-Xe-F sigma bonds. The remaining three hybrid orbitals with lone pairs do not participate in bonding.

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The belt of maximum solar energy input to earth swings back and forth through the tropics.

Solar energy is the energy derived from the sun, or rather, from the heat produced by sun. This heat/radiation is propagated in the form of electromagnetic radiations. The amount of solar radiation that reaches any given area on the Earth's surface is not constant - it fluctuates. Although, every location receives some sunshine during the course of a year. This radiation is captured using solar technology, which transforms it into useful energy for different purposes. Photovoltaics (PV) and concentrating solar-thermal power (CSP) are the two main solar technologies used. If we observe the movement of earth around the sun, we know that the tropics (around the equator) receive maximum sunlight throughout the year, wheres, the poles receive the minimum. Hence, The belt of maximum solar energy input to earth swings back and forth through the tropics.

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Carbon, oxygen, and hydrogen make up the biomolecules known as sugar or carbohydrate molecules. It is a macronutrient that the body needs for proper operation and energy.

250 grams of carbohydrate will be present in the 2200 calorie diet of food

The following can be estimated:

If carbs provide 50% of the calories in a diet, then the number of calories they create is 1100

4 calories per gram of carbohydrates

So 1100 calories equal grams.

= 275 gm

Bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks, corn, and cherry pie are just a few examples of foods high in carbohydrates, both healthy and bad.  Sugars, fibers, and starches are the three most prevalent and plentiful types.

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275 gm of calories come from carbohydrates from a diet that has 2,200 calories, of which 50% are carbohydrate.

The biomolecules known as sugar or carbohydrate molecules are composed of carbon, oxygen, and hydrogen. The body requires this macronutrient for proper function and energy.

The 2200 calorie diet will contain 250 grammes of carbohydrate.

It is possible to estimate the following:

If carbohydrates contribute 50% of the calories in a diet, then 1100 calories are produced.

Per gramme of carbohydrates, there are 4 calories.

1100 calories therefore equal 1 gramme.

= 275 gm

Examples of foods high in carbohydrates, both good and bad, include bread, beans, milk, popcorn, potatoes, cookies, spaghetti, soft drinks, corn, and cherry pie. The three most common and plentiful types are sugars, fibres, and starches.

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The coefficient of Al₂(SO₄)₃ when balance is 1. Al₂(SO₄)₃. Since Al₂(SO₄)₃  is a balance structure, the coefficient does not need to be add.

Let's say we have unbalance reaction  CaSO₄  + AlCl₃ →  Al₂(SO₄)₃   +   CaCl₂. To make it balance, follow this steps:

The result of the example will be:

3CaSO₄  + 2AlCl₃ →  Al₂(SO₄)₃   +   3CaCl₂

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When this mixture is supplied at a total pressure of 7.8 atm, the partial pressure of oxygen will be 0.0198 atm.

The amount of pressure that each gas in a mixture exerts is referred to as "partial pressure." This is found by using the formula, Partial pressure = Mole fraction × Total pressure.

First, find the mole fraction of the oxygen gas. This is calculated as follows,

[tex]\begin{aligned}X_{O_2}&=\mathrm{\frac{\frac{2\;g\cdot mol^{-1}}{32\;g\cdot mol^{-1}}}{\frac{2\;g}{32\;g\cdot mol^{-1}}+\frac{98\;g}{4\;g\cdot mol^{-1}}}}\\&=2.54\times10^{-3}\end{aligned}[/tex]

Substituting the value of total pressure and mole fraction of oxygen, we get, the partial pressure value as 2.54×10⁻³×7.8 atm = 0.0198 atm.

Therefore, the required answer is found to be 0.0198 atm.

The complete question is -

A heliox deep-sea diving mixture contains 2.0 g of oxygen for every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 7.8 atm?

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If 6.73 g of Na2CO3 is dissolved in enough water to make 250.0 mL of solution. The molar concentration of sodium carbonate will be  0.254 M.

Molarity is defined as the concentration of solute or a substance in given volume of a solution. The data guven in the question is as follows,

mass of sodium carbonate = 6.73 g

volume of solution =250 mL

Molar mass of sodium carbonate = 105.99 g/mol

So the molarity can be calculated as:

M =[tex]\frac{n}{V}[/tex]

=[tex]\frac{6.73}{250}[/tex] × [tex]\frac{1}{105.99}[/tex] ×[tex]\frac{1000ml}{1L}[/tex]

=0.254M Na₂CO₃

Thus, molarity of sodium carbonate is 0.254 M.

The dissociation of sodium carbonate in the ions, we get:

Na₂CO₃→ 2Na⁺ + CO₃⁻²

From the above equation, it can be interpreted as there is 1:2 mol ratio between sodium carbonate and sodium ion. The molarity of sodium will be:

Na⁺ =2×0.245=0.508 M

Also, it is seen that there is 1:1 mol ratio between sodium carbonate and carbonate ion, therefore, its molarity will be:

CO₃⁻² = 0.245M

Thus, the molarity of the sodium carbonate will be 0.254 M.

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Yes, a hydrogen electron in its ground state will take in a photon with energy below 13.6 eV. because of the 13.6 eV ground state energy of the hydrogen atom.

Because of this, an electron absorbs energy from incident photons with energies above 13.6 eV and ionises the atom. The electron (e or) is a subatomic particle with a negatively polarised initial electric charge of one. The electron, a member of the first generation of the lepton particle family, is usually regarded as an elementary particle because it has no known components or substructure. The photon, a basic particle and the carrier of the electromagnetic force, is a quantum of the electromagnetic field, which also comprises electromagnetic radiation such as light and radio waves.

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