balancing chemical equations
(pls help a girl out)

H₂O₂ → H₂O + O₂

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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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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Answer: I need this answer too

Explanation:

Hope someone can help us

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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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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According to stoichiometry of the given chemical equation, 52.47 g of fluorine are needed to produce 70.0 g of hydrofluoric acid .

It 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.

In the given chemical equation, 190 g of fluorine gives 120.06 g of HF

∴70 g of HF will give 70×190/120.06=52.47 g.

Thus, 52.47 g of fluorine are needed to produce 70.0 g of hydrofluoric acid .

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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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A cation's name, symbol, and charge must be noted in order to determine the ionic compound's formula.

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An ionic compound's name and formula always place the cation before the anion.

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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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You can solve this problem using stoichiometry:

The tables is already set for you, so let's solve this using it:

Starting at the 75.0 g, divide it by 44.96:

you are left with 1.668 mol because the g cancel each other out.

Now multiply 1.668 mol with 6.02 × 10²³ atom to be left with

1.0041 mol · atom Sc

1 mol Sc

The mol cancel each other out, so your final rounded answer will be

Answer: 1 × 10²³ atoms Sc

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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An ionic compound is a type of chemical compound that is composed of two ions held together by electrostatic forces.

A chemical compound is a combination of two or more elements that are chemically bonded together in a specific ratio. Chemical compounds are formed when the atoms of different elements are joined together through chemical bonds, which are formed when at least one atom gives or shares one or more electrons with another atom.

The two ions, a cation and an anion, are usually a metal and a non-metal. The cation carries a positive charge and the anion carries a negative charge. For example, in the ionic compound NaCl, the cation is sodium (Na+) and the anion is chloride (Cl-). In CrCl4, the cation is chromium (Cr4+) and the anion is chloride (Cl-). In NH,Br, the cation is nitrogen (NH+) and the anion is bromide (Br-). In Cu(OH)2, the cation is copper (Cu2+) and the anion is hydroxide (OH-).

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2.87 kg will be equal to 2870 grams, when converted using the metric system.

The metric system is a decimalized system of measurement used in many parts of the world. It is based on a decimal system, where the base unit of measurement is the gram. The metric system is the most common system of measurement used in the world today and is used in many scientific and medical applications.

It is based on the decimal system, where units of measurement are based off of a single base unit. It is also easy to convert from one unit of measurement to another, as the conversions are based on multiples of ten. This makes it easier to use and understand and is beneficial in many applications.

In order to convert 2.87 kg to grams, the following steps can be taken:

1. Multiply 2.87 kg by 1000, as there are 1000 grams in 1 kg.

2. 2.87 kg x 1000 = 2870 g

Therefore, 2.87 kg is equal to 2870 grams when using the metric system.

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Atomic radius is the distance from the atom’s nucleus to the outer edge of the electron cloud.

Atomic radius decreases across a Period, but increases down a Group.

In a period, from left to right, with increase in the atomic number, the atomic radius decreases due to increase in the nuclear charge which increases the attraction of the nucleus for the valence electrons.

In a group, on moving from top to bottom, the ionic radius increases as a new energy level is added at each succeeding element but the number of valence electrons remains same.

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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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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 efficiency of the engine that absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle is 40%.

The formula for the engine's efficiency is as follows:

η = (W/Q) x 100

η = the engine efficiency

W = work done by the engine

Q = heat absorbed by the engine

Q = 2500 J is the amount of heat that a gasoline engine can absorb.

Engine performs mechanical work at a rate of W = 1000 J.

The idea of engine efficiency is frequently used to rate and quantify the propensity to perform work. The ratio of work produced to the amount of heat supplied is used to express it.

So, the efficiency of the engine:

η = (W/Q) x 100

= (1000 J / 2500 J) x 100

= 0.4 x 100

= 40%

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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.

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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The acceleration of the bike can be obtained as 1.67 m/s^2.

By the use of the formula that we get from the Newton second law we can be able to connect the force that has been exerted on the bike to the acceleration of the bike and that is what we are going to do in the problem that we want to solve.

Given that;

F = ma

m = mass of the bike

a = acceleration of the bike

F = force applied

Then we have;

a = 150 N/90Kg

a = 1.67 m/s^2

The bike is going to have an acceleration of 1.67 m/s^2.

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The acid-base reaction is when an acid and a base react together to form a salt and water.

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Option (c) is correct. 3.80 x 10^24 atoms of oxygen are contained in 160 grams of N2O3. This is calculated by using the Avogadro's constant.

mass of N2O3 = 76.01 g/ mole

Moles of N2O3 = 160 grams / 76. 01 g/ mole

                          = 2.104

Mole can be defined as the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.

moles of Oxygen = moles of N2O3 x number of oxygen atoms in N2O3

                             = 3 x 2.104  =6.315 moles

the atoms of oxygen = (6.315 moles x 6.02 x10 ^23 atoms) / 1 mole

                                    =3.80 x 10^24 atoms

here used Avogadro's constant. Avogadro's constant is the proportionality factor that relates the number of constituent particles in a sample with the amount of substance in that sample. It is an SI defining constant with an exact value of 6.02214076×10²³ reciprocal moles.

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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 atomic number of the element that does not usually form compounds because its outermost shell is full is eighteen (18).

An atomic number is the number of a chemical element in the periodic table in which elements are arranged according to the increasing number of protons in the nucleus. Therefore, the number of protons that is always equal to the number of electrons in neutral atoms is also called the atomic number. When the outermost shell of an element is full, it has atomic number eighteen (18).

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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

Answer:

Explanation:

amine is a rapper A+?