What is a speed of 55 mph equivalent to in units of m/s? (1 mile = 1609 m, 1 hour = 3600 s)

Answer: i think it is 144.16

Explanation:

Answer:

 ok        ,

Explanation:

     .

Answer:

Venus

Explanation:

From the sun outwards is   Mercury   Venus  Earth  and then Mars

One mole of NaOH = 40g NaOH

One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in water

One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,

One mole of NaOH = 40g NaOHso to prepare 1M NaOH we need to dissolve 40g NaOH in wateraccording to the given data,we have 6 moles of NaOH so we need 6 litres of Water olto prepare 1M Solution

Answer:

\(\boxed {\boxed {\sf C. \ 9460 \ kJ}}\)

Explanation:

The formula we must use is given to us:

\(q=mL_{vapor}\)

q is the energy, m is the mass, and L(vapor) is the latent heat of vaporization.

The energy is what we calculate and the mass is 2 kilograms. We need to find the latent heat of vaporization, which is on the table.

Now we know:

\(m= 2 \ kg \\L_{vapor}=4730 \ kJ/kg\)

Substitute the values into the formula.

\(q=(2 \ kg ) * (4730 \ kJ/kg)\)

Multiply. Note that the kilograms (kg) will cancel each other out.

\(q= 2* 4730 \ kJ\)

\(q= 9460 \ kJ\)

9460 kilojoules are required to vaporize 2 kilograms of copper.

Dihydroxyacetone is a ketose, while glyceraldehyde is an aldose.

Aldoses are carbohydrates that contain an aldehyde group (carbonyl group on a terminal carbon atom). This means that, of the two, glyceraldehyde is the aldose (more precisely, an aldotriose, because it has 3 carbon atoms) as glyceraldehyde molecule has an aldehyde group.

On the other hand, ketoses are carbohydrates that contain a keto group (carbonyl group that is not located on a terminal carbon atom). This means that dihydroxyacetone is the ketose (more precisely, a ketotriose, because it also has 3 carbon atoms), as the acetone molecule has a keto group.

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Answer:

An emerald can be described as a compound because it is made up of many different elements.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, an emerald can be described as Compound.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. The chemical formula for emerald is Be\(_3\)Al\(_2\)(SiO\(_3\))\(_6\). An emerald can be described as Compound.

Therefore, the chemical formula for emerald is Be\(_3\)Al2(SiO\(_3\))\(_6\). An emerald can be described as Compound.

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The verse exhorts us to pray by God's will because it assures us that if we make a request that is in harmony with his plans, he will hear us and grant our desire.

In the meantime, James 5:15–16 exhorts us to confess our faults to one another and to pray for bodily healing, knowing that a good person's ardent prayer has enormous power and can be successful in bringing about healing and forgiveness.

These verses demonstrate to us the importance of prayer in our relationship with God and the potency of prayer in meeting both spiritual and material demands. I will try to pray more firmly as I apply these verses to my daily life, believing that God hears my prayers and will grant them by his will. I shall also bear in mind to offer prayers for my own and others' bodily well-being.

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Answer:

of zinc sulfide:

0.382 moles ZnS * 97.45 g/mol = 37.4 g ZnS

To find the mass of the excess reactant (sulfur) that will remain after the reaction is complete, we need to subtract the mass of the product (zinc sulfide) from the mass of the excess reactant:

30.0 g sulfur - 37.4 g ZnS = -7.4 g excess sulfur

Since the mass of the excess reactant is negative, this means that the reaction will consume all of the sulfur and there will be none left over.

To summarize:

A. Zinc is the limiting reactant.

B. 37.4 g of ZnS will be formed.

C. There will be no excess sulfur left over after the reaction is complete.

Explanation:

The hybridization state of the atom determines its shape in the molecule. C1  is sp2 hybridized and has trigonal planar geometry while C2 is sp3 hybridized and has a tetrahedral geometry.

The shape of a molecule or a moiety in a molecule is determined by the number of electron pairs that are present on the valence shell of the central atom in the molecule.

The hybridization state of the atom also determines the shape of the atom. In the compound, the carbon atom labelled 1 is sp2 hybridized so it will have a trigonal planar geometry. The carbon atom labelled 2 is sp3 hybridized hence it is tetrahedral.

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Answer:

As

Explanation:

because of ionic bond

The additional information that is required to obtain the enthalpy of neutralization is the density of the solution.

We know that the enthalpy of neutralization is defined as the heat that is evolved when  an acid is neutralized by a base under standard conditions. We can be able to obtain the enthalpy of the neutralization of the acid and the base by performance of some simple chemical calculations.

To carry out this calculations we need the all of the pieces of information that have been listed in the question such as the masses of the solution, the temperature of the solution in the initial and final states and so on.

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The solubility product, Ksp at the temperature, given that 1.2×10⁻³ mole of PbI₂ is dissolved in 1 L of solution is 6.91×10⁻⁹

First, we shall obtain the molarity of the PbI₂ solution. Details below:

Molarity of solution = mole / volume

Molarity of PbI₂ = 1.2×10⁻³ / 1

Molarity of PbI₂ = 1.2×10⁻³ M

Next, we shall determine the concentration of Pb²⁺ and I⁻ in the solution. Details below:

PbI₂(s) <=> Pb²⁺(aq) + 2I⁻(aq)

From the above,

1 moles of PbI₂ contains 1 mole of Pb²⁺ and 2 moles of I⁻

Therefore,

Concentration of Pb²⁺ = 1.2×10⁻³ × 1 = 1.2×10⁻³ M

Concentration of I⁻ = 1.2×10⁻³ × 2 = 2.4×10⁻³ M

Finally, we can determine the solubility product (Ksp). This is illustarted below:

PbI₂(s) <=> Pb²⁺(aq) + 2I⁻(aq)

Ksp = [Pb²⁺ ] × [I⁻]²

Ksp = 1.2×10⁻³ × (2.4×10⁻³)²

Solubility product, Ksp = 6.91×10⁻⁹

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Answer:

∆H0 = -222kJ/mol

Explanation:

Using Hess's law, we can find the ΔH of a reaction from the sum of another related reactions as follows:

Using the reactions:

(1) C(s) + O2(g) → CO2(g) ∆H0= -394 KJ/mol

(2) CO(s) + 1/2 O2(g) → CO2(g) ∆H0= -283 KJ/mol

Twice (1):

2C(s) + 2O2(g) → 2CO2(g) ∆H0= 2*-394 KJ/mol = -788kJ/mol

The inverse reaction of (2):

-(2) CO2(g) → CO(g) + 1/2 O2(g) ∆H0= 283 KJ/mol

Twice this reaction:

2*-(2) 2CO2(g) → 2CO(s) + O2(g) ∆H0= 2*283 KJ/mol= 566kJ/mol

Now, the sum of 2*(1) - 2*(2) produce:

2C(s) + 2O2(g) + 2CO2(g)→ 2CO2(g) + 2CO(g) + O2(g) ∆H0= -788kJ/mol +  566kJ/mol

Subtracting the molecules that ar in both sides of the reaction:

2C(s) + O2(g) → 2CO(g) ∆H0 = -222kJ/mol

The rate of decomposition of XO2 after 1 hour : \(\tt A=A_o.e^{-1.08}\)

Given

the half-life 38.6 min

time of decomposition = 1 hour

Required

the rate of decomposition

Solution

First-order reaction :

\(\tt A=A_o.e^{-kt}\)

the half life=t1/2 :

\(\tt t\frac{1}{2}=\dfrac{ln~2}{k}\)

so the rate constant (k) :

\(\tt k=\dfrac{ln~2}{38.6}=0.018\)

The rate after 1 hour=60 min :

\(\tt A=A_o.e^{-0.018\times 60}\\\\A=A_o.e^{-1.08}\)

The molarity of calcium hydroxide if 15 ml of the solution is neutralized by 15.8 ml of. 90M phosphoric acid​ is 0.22 M.

The balanced chemical equation for the reaction between calcium hydroxide and phosphoric acid is:

Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + 2H₂O

The molar ratio of calcium hydroxide to phosphoric acid is 1:3.

The volume of the phosphoric acid solution is 15.8 mL and the molarity of the phosphoric acid solution is 0.90 M.

Use the following equation to calculate the moles of phosphoric acid:

moles of H₃PO₄ = molarity × volume

moles of H₃PO₄ = 0.90 M × 15.8 mL

moles of H₃PO₄ = 14.22 mmol

Since the molar ratio of calcium hydroxide to phosphoric acid is 1:3, the moles of calcium hydroxide is 1/3 of the moles of phosphoric acid.

moles of Ca(OH)₂ = moles of H₃PO₄ / 3

moles of Ca(OH)₂ = 14.22 mmol / 3

moles of Ca(OH)₂ = 4.74 mmol

Use the following equation to calculate the molarity of calcium hydroxide:

molarity of Ca(OH)₂ = moles of Ca(OH)₂ / volume

molarity of Ca(OH)₂ = 4.74 mmol / 15 mL

molarity of Ca(OH)₂ = 0.28 M

Therefore, the molarity of calcium hydroxide is 0.22 M.

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Answer:

The substances which neutralize the acids of the stomach are called antacids. Acidity in the stomach causes the sensation of heartburn, antacids are taken to relieve this sensation. They are taken orally to suppress the effects of acidity.

Sulfur trioxide's chemical name is SO3. That is accurate, indeed. Three oxygen atoms and one sulphur atom make up the chemical compound trioxide, which has the formula SO3. It also goes by the name sulphur

With the chemical formula SO3, sulphur trioxide, sometimes referred to as trioxide, is a highly reactive and corrosive substance. It is a colourless to white crystalline substance that easily transforms into sulfuric acid when exposed to water. Sulfur dioxide and oxygen react in the presence of a catalyst, such as vanadium pentoxide, to form trioxide in an industrial setting. It is employed in the production of sulfuric acid, one of the most significant industrial compounds having several uses across numerous industries. Trioxide is used in a variety of specialised processes, including the creation of synthetic textiles and pigments. Nonetheless, trioxide has to be handled carefully and with the right safety precautions

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The balanced chemical equation for the reaction between cast-iron (III) oxide and hydrogen gas to form solid iron and liquid water is:

Fe₂O₃(s) + 3 H₂(g) ⇒ 2 Fe(s) + 3 H₂O(l)

Let's consider the unbalanced equation that happens when solid iron (III) oxide reacts with hydrogen gas to form solid iron and liquid water. this is often a redox reaction.

Fe₂O₃(s) + H₂(g) ⇒ Fe(s) + H₂O(l)

We can balance it using the trial and error method. First, we'll balance O atoms by multiplying H₂O by 3.

Fe₂O₃(s) + H₂(g) ⇒ Fe(s) + 3 H₂O(l)

Then, we balance H atoms by multiplying H₂ by 3.

Fe₂O₃(s) + 3 H₂(g) ⇒ Fe(s) + 3 H₂O(l)

Finally, we get the balanced equation by multiplying Fe by 2.

Fe₂O₃(s) + 3 H₂(g) ⇒ 2 Fe(s) + 3 H₂O(l)

The balanced chemical equation for the reaction between cast-iron (III) oxide and hydrogen gas to form solid iron and liquid water is:

Fe₂O₃(s) + 3 H₂(g) ⇒ 2 Fe(s) + 3 H₂O(l)

A balanced equation is an equation for a reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and therefore the charge are balanced on both sides of the reaction

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Answer:

charges on the drops were all integer multiples of a fundamental unit of charge.

The global pattern of atmospheric circulation can be described using the model of the three major cells: the Hadley Cell, Ferrel Cell, and Polar Cell. These cells are driven by the unequal heating of Earth's surface and the rotation of the planet.

The Hadley Cell, operating between the equator and approximately 30 degrees latitude in both hemispheres, is formed due to the intense solar radiation at the equator. Warm air rises, creating a low-pressure zone, and as it moves away from the equator, it descends around 30 degrees latitude, forming a belt of high pressure.

The Ferrel Cell exists between approximately 30 and 60 degrees latitude in both hemispheres. It is influenced by the interaction between the Hadley Cell and the Polar Cell. Air masses from the Hadley Cell collide with those from the Polar Cell, leading to rising motion and the formation of a low-pressure region.

The Polar Cell operates near the poles, between approximately 60 and 90 degrees latitude in both hemispheres. Cold air sinks and moves toward lower latitudes, creating a high-pressure region. As it moves equatorward, it encounters warmer air from the Ferrel Cell, resulting in rising motion and the formation of a low-pressure zone.

While this model is useful for describing winds over oceans, it is not as applicable to winds over landforms like coastlines and mountains. Local topography plays a significant role in modifying wind patterns in these areas. Coastlines can experience sea breezes and land breezes due to differential heating between land and water, while mountains can act as barriers or cause orographic effects, altering wind speed and direction.

In summary, the model of atmospheric circulation based on the unequal heating of Earth's surface and the planet's rotation provides a framework for understanding the general global wind patterns. However, local topography and specific geographical features play a crucial role in shaping wind patterns over landforms, making the model less applicable in those cases.

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Bohr combined the discoveries of regularities in the hydrogen spectrum, the existence of the electron, and knowledge of the atom's nucleus to create his model of the atom.

Bohr's model of the atom was based on several key discoveries in physics, including regularities in the hydrogen spectrum, the existence of the electron, and knowledge of the atom's nucleus. The discovery that light emission and absorption only occurred in discrete chunks was also an important factor in Bohr's model.

By combining these findings, Bohr was able to create a model of the atom that accounted for the behavior of electrons and their interactions with the nucleus. The model also explained the regularities observed in the hydrogen spectrum and provided a framework for understanding the behavior of atoms in different states. Overall, Bohr's model was an important step in the development of atomic theory and helped to establish the foundation for modern physics.

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Answer: the answer is LIQUIDS

Answer:

D. Liquids

Explanation:

Liquid is probably the rarest state in the Universe, with the only discovered naturally occurring liquids being the Earth's surface water and our liquid metal core.

The value of K will vary depending on the specific conditions of the reaction.

The equilibrium constant, denoted as K, expresses the ratio of the concentrations (or partial pressures) of the products to the concentrations (or partial pressures) of the reactants at equilibrium. For the given reaction:

2 CH₃Cl(g) + Cl₂(g) ⇌ 2 CH₂Cl₂(g) + H₂(g)

The equilibrium constant expression can be written as:

K = [CH₂Cl₂]²[H₂] / [CH₃Cl]²[Cl₂]

Note that the concentrations of gases are usually expressed in terms of their partial pressures. If the concentrations are given in molarities, you can replace them with the corresponding partial pressures using the ideal gas law.

It's important to note that without specific information on the concentrations (or partial pressures) of the substances at equilibrium, it's not possible to calculate the numerical value of the equilibrium constant K. The value of K will vary depending on the specific conditions of the reaction.

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Temperature factor plays the most important role in the decomposition reaction of magnesium oxide.

Those reactions which are exothermic in nature or release heat during the reaction are spontaneous reactions.

Given decomposition reaction of magnesium oxide is:

MgO(s) + 601.7 kJ → Mg(s) + ½ O₂(g)

From the above reaction, it is clear that during the decomposition of magnesium oxide heat is absorbed. So, for the feasible decomposition of compound accurate temperature is wanted.

Hence, correct option is temperature.

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Answer:

temperature

A.

Explanation:

edgen

Answer:

An object's density is the ratio of mass to volume of an object. The mass is how much it resists acceleration when a force is applied to it and generally means how much of an object or substance there is.

Answer:

brainleist

pls

Explanation:

An object's density is the ratio of mass to volume of an object. The mass is how much it resists acceleration when a force is applied to it and generally means how much of an object or substance there is.