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Balance this equation: __H2+ 2 O2---> 2 H2O

Answer:

I think is the last one!!!! punnet square ⬜

Answer:

it's volume also decrease

Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

Option A

Mark the line thermometer reading decreases.

Answer:

the surface area of a solid reactant.

temperature.  

presence/absence of a catalyst.

The chance of having children with blood group AB for a couple with the husband of heterozygous A (AO) and the wife of heterozygous B (BO) is 25%. The correct option is A.

The antigens of the ABO blood group are encoded by a single genetic locus, the ABO locus, which has three alternative (allelic) forms A, B, and O.

A child inherits one of the three alleles from each parent, resulting in six genotypes and four blood types.

Blood groups are inherited. They follow a Mendelian pattern, which means they are the result of a single gene.

There are three types of alleles in the ABO gene: A, B, and O. The first two, A and B, are codominant, which means they are equally dominant.

As per the attached Punnett Square, the genotype can be AB, AO, BO, and OO. So, the chance of having children with blood group AB as per the given scenario, will be 25%.

Thus, the correct option is A.

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Answer:

4.97 moles

Explanation:

There are  6.022*10^23 calcium  atoms  in 1 mole of  Ca

2.99*10^24/6.022*10^23

=4.97 moles

Answer:

4.97 mol

Explanation:

Given data:

Number of atoms of Ca = 2.99×10²⁴

Number of moles of Ca = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

2.99×10²⁴  atoms × 1 mol  / 6.022 × 10²³ atoms

0.497×10¹ mol

4.97 mol

The most likely change in pH when the H+ ions in the solution is increased to twice its original concentration is from 9.5 to 6.5.

This is because the pH of a solution is a measure of the concentration of H+ ions in the solution, and if the concentration is doubled, the pH will decrease. This can be shown mathematically using the equation pH = -log[H+]. For example, if the original concentration of H+ ions is 10^-9.5 moles/liter, then the pH will be 9.5. If the concentration of H+ ions is doubled to 10^-9 moles/liter, then the pH will become 6.5 (-log[10^-9]).

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complete question:What will be the most likely change in pH when the H+ ions in the solution is increased to twice its original concentration?

5.0 to 2.5

4.0 to 2.0

1.6 to 1.3

9.5 to 6.5

The number of moles of NaCl contained in 350 ml of a 0.115 M solution can be calculated by using the formula: moles = volume (in liters) x molarity: moles = 0.35 L x 0.115 M = 0.04025 moles. Therefore, the correct answer is option (b) 0.040.

In the given solution, the volume is converted from milliliters to liters by dividing by 1000 since there are 1000 milliliters in a liter. Then, we multiply the converted volume by the molarity of the solution, which represents the number of moles of solute (NaCl) per liter of solution. By multiplying the volume and molarity, we obtain the number of moles of NaCl present in the solution. Rounding the result to the appropriate number of significant figures, we find that there are approximately 0.040 moles of NaCl in 350 ml of the 0.115 M solution, confirming option (b) as the correct answer.

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The species with the highest energy-filled or partially-filled orbitals is the one with electrons occupying the highest energy level or subshell in its electron configuration.

The species with the highest energy-filled or partially-filled orbitals depends on the specific element or molecule being considered. In general, however, atoms and molecules with a partially-filled valence shell (outermost shell) tend to have higher energy-filled orbitals compared to those with a fully-filled valence shell. This is because partially-filled orbitals have more unpaired electrons, which can interact more readily with other electrons and other atoms/molecules. Additionally, elements with a higher atomic number tend to have higher energy-filled orbitals due to the increased number of electrons and protons in their nucleus.
Based on the terms provided, I can give you a general answer:  In such species, electrons reside in orbitals that are farther from the nucleus and require more energy to maintain their positions.

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The mass of \(Ag_2SO_4\) precipitates out is 3.8975 g

We need to use the stoichiometry of the chemical reaction between \(AgNO_3\) and \(Na_2SO_4\) to determine how much \(Ag_2SO_4\) will be formed. The balanced chemical equation for the reaction is:

\(AgNO_3 + Na_2SO_4\) → \(Ag_2SO_4 + 2NaNO_3\)

Moles of \(AgNO_3\) = volume (in L) × molarity

                            = 0.025 L × 0.500 mol/L

                            = 0.0125 mol

Moles of \(Na_2SO_4\) = volume (in L) × molarity

                             = 0.040 L × 0.250 mol/L

                             = 0.010 mol

The number of moles of \(Ag_2SO_4\) formed is equal to the number of moles of \(AgNO_3\):

Moles of Silver nitrate (\(Ag_2SO_4\)) = 0.0125 mol

Calculate the mass of \(Ag_2SO_4\):

Mass of \(Ag_2SO_4\)= moles of \(Ag_2SO_4\) × molar mass

Mass of \(Ag_2SO_4\) = 0.0125 mol × 311.8 g/mol

Mass of \(Ag_2SO_4\) = 3.8975 g

Therefore, the mass of \(Ag_2SO_4\) formed is 3.8975 g.

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Answer:

I'm pretty sure light waves do not require a medium to travel

Answer:

La fórmula empírica es C₂N₂K₅

Explanation:

La fórmula empírica es la expresión más sencilla para representar un compuesto químico e indica los elementos que están presentes y la proporción mínima en números enteros que hay entre sus átomos. A esta fórmula se le conoce también como “fórmula mínima” .

En otras palabras, la fórmula empírica muestra la proporción entre los átomos de un compuesto químico.

Si supones que tenes 100 gramos del compuesto, los porcentajes en masa indicarán los gramos de cada elemento en esos 100 gramos. Si la sustancia está compuesta por 18,4% de carbono, 21,5% de nitrógeno y 60,1% de potasio, entonce habrá 18,4 g de carbono, 21,5 g de nitrógeno y 60,1 g de potasio

Para la obtención de la fórmula empírica entonces, teniendo en cuenta la masa molecular de cada sustancia, en primer lugar se calcula el número de moles relativos de cada elemento químico:

C: 18.4 g/12 g/mol = 1.5 moles

N: 21.5 g/14 g/mol = 1.5 moles

K: 60.1 g/16 g/mol = 3.75 moles

De esta manera hallas la relación entre el número de moles de los distintos elementos, pero no estará expresada en forma de números enteros y sencillos. Para expresar la relación anterior en forma de números enteros y sencillos, divides el número de moles de cada elemento entre el número de moles menor de todos ellos.

C =  1.5 moles/ 1.5 moles = 1

N =  1.5 moles/ 1.5 moles = 1

K =  3.75 moles/ 1.5 moles = 2.5

Si no se obtiene una relación de números enteros, debes multiplicar por un número sencillo para conseguirlo. En este caso, multiplicando por dos obtienes:

C= 2

N= 2

K= 5

La fórmula empírica es C₂N₂K₅

The empirical formula of the compound will be CNK

To get the empirical formula of the compound, we will follow the steps below;

Divide the mass of the elements by the molar mass to get the moles of each element;

Divide through by the smallest ratio to get the ratio of each element present in the compound

The empirical formula of the compound will be CNK

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Answer:

first balance the equation:

2SO2+O2=2SO3. BALANCED EQUATION

find the ratio:

2:1:2. SO2:O2:SO3

5.0 moles of SO2 React

1/2×5.0 moles=2.5moles of O2 are needed

The 1.8 moles of the oxygen (O₂) gas are required to react with 3.6 mol SO₂(g).

A chemical equation is a way to represent a chemical reaction in terms of chemical symbols of the reactants and products. The equation in which the number of atoms of chemical substances (reactants and products) is equal on either side of the equation is known as a balanced chemical equation.

Balancing of a chemical equation must follow the law of conservation of mass. The total mass of the elements present on the reactant side must be equal to the total mass of elements present on the product side while obeying this law in a balanced chemical equation.

Given, the chemical equation of the formation of sulphur trioxide is:

2SO₂(g)  + O₂(g)  →  2SO₃(g)

From the above equation, we can say that the two moles of sulphur dioxide react with one mole of oxygen gas to form two moles of sulphur trioxide gas.

3.6 moles of the SO₂(g) react with moles of oxygen gas = 3.6/2 = 1.8 mol

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Answer:

The rock changes into a Metamorphic rock

Explanation:

Usually, metamorphic rocks start out as some other type of rock, either igneous, sedimentary or even a metamorphic rock. The process of transformation is known as Metamorphism.

When a rock sitting on the surface of the earth is pushed down deep into the earth over time and is exposed to tremendous heat and pressure over time and does not melt, it changes into a metamorphic rock.

A metamorphic rock is formed from a combination of factors such as tremendous heat, high pressure, hot fluids rich in minerals which are all found deep down in the earth.

Answer:

I think bread is the answer

Answer:

chlorine

Explanation:

yup

Answer:

chlorine

Explanation:

Edge 2020

~theLocoCoco

Howler and warnibers is answer

Answer:

22 electrons

Explanation:

correct answer correct answer correct answer

Answer:

el río esta libertad haora

Explanation:

owk7uuur98

88388811111q1

The rate of change of thermal-energy of the sphere is 4.77 W.

A cubical box with each side 6 cm with a black surface is cooled to -70°C and then suspended in a large evacuated enclosure the black walls of which are maintained at 30°C.

The rate of change of thermal energy of the sphere can be calculated using Stefan's Law.

Stefan's Law states that the rate at which a body radiates energy is directly proportional to the fourth power of its absolute temperature. It is given by:    P = eσAT4

Where, P = Power radiated

e = Emissivity of the body

σ = Stefan's constant = 5.65 x 10-8 W/m2K4

A = Surface area of the body

T = Absolute temperature

The rate of change of thermal energy of the sphere can be found by finding the rate of change of power radiated by the sphere.

Thus, the rate of change of thermal energy of the sphere is given by:

dQ/dt = - eσA [(T1)⁴ - (T2)⁴]

where,T1 = Initial temperature = -70 + 273 = 203 K (temperature in Kelvin)

T2 = Temperature of the enclosure = 30 + 273 = 303 K (temperature in Kelvin)e = 1 (for black bodies)

σ = Stefan's constant = 5.65 × 10-8 W/m2K4

A = Surface area of the cube = 6 × 6 × 6 = 216 cm² = 0.0216 m²dQ/dt = -1 × 5.65 × 10-8 × 0.0216 × [(203)⁴ - (303)⁴]

Therefore, dQ/dt = 4.77 W

The rate of change of thermal energy of the sphere is 4.77 W.

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The permeability of latex gloves can be affected by several factors, including:

Time: The longer latex gloves are worn, the more likely they are to degrade and lose their ability to act as a barrier.

Temperature: High temperatures can accelerate the breakdown of latex gloves, leading to increased permeability.

Chemical exposure: Exposure to chemicals can cause the latex to break down, making the gloves more permeable.

Physical damage: Damage to gloves, such as cuts, tears, or punctures, can compromise their ability to act as a barrier.

Fit: If gloves are too loose or too tight, they may be more likely to tear or become damaged, which can increase their permeability.

Latex sensitivity: Some individuals may have an allergic reaction to latex, which can cause the gloves to break down and become more permeable.

Overall, it is important to handle latex gloves carefully and replace them when they become damaged or worn to ensure proper protection.

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Answer:

120 kPa = 1.25 L

Explanation:

Because 120/1.50 is 80. And then if you divide 100 by 80, you get 1.25.

The volume occupied by 0.208 mol of CH₃CH₂F(g) at a temperature of 298.15 K and a pressure of 1 atm is approximately 5.38 liters.

To calculate the volume occupied by 0.208 mol of CH₃CH₂F(g) at a temperature of 298.15 K and a pressure of 1 atm, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

Let's plug in the given values and solve for V:

P = 1 atm

n = 0.208 mol

R = 0.0821 L·atm/(mol·K)

T = 298.15 K

V = (nRT) / P

V = (0.208 mol × 0.0821 L·atm/(mol·K) × 298.15 K) / 1 atm

V ≈ 5.38 liters

Therefore, the volume occupied by 0.208 mol of CH₃CH₂F(g) at a temperature of 298.15 K and a pressure of 1 atm is approximately 5.38 liters.

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Explanation:

burning molecules release energy combine and release energy usually one of the two molecules is oxygen or something else chemically like it called an oxidizer when the molecules combine and release energy it is released in the form of heat and often light.

Answer:

The cooperation of a species is shown throughout history. Including in our history. Where it be physical evolution or technological. We have helped each other with building, advice, locations, Reproduction, etc.

Answer:

146 neutrons.

Explanation: