. 2.514g Ca, 1.004g O empirical formula

Answer : The molecular formula of the compound is, \(C_8H_9O_3N\)

Explanation :

Molecular formula : It is the representation of substance by the symbols and it denotes the number of atoms of each element present in the compound.

Now count the number of carbon, hydrogen, nitrogen and oxygen atoms present in the given compound.

As we see that in the given compound, there are 8 atoms of carbon element, 3 atoms of oxygen element, 1 atom of nitrogen element, 9 atoms of hydrogen element.

Thus, the molecular formula of the compound will be \(C_8H_9O_3N\)

Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Answer:

a.) x = 5

Explanation:

According to the research, the correct answer is C. Electrical energy is converted to sound energy is the energy transformation that happens in Betsy's alarm clock to wake her up in the morning.

It is the study of how energy changes from one type as Electrical energy to another for example sound energy where a given system converts energy from one form to another.

In this sense, the power source of a clock can be an electric current while doing work, the energy transformation can lead to the formation of sound energy due to some mechanical activities inside the clock.

Therefore, we can conclude that the electrical energy that makes the clock work, whose vibrations cause the energy to be transformed into sound energy in the membrane, displace the coil within the magnetic field.

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Answer:

0.24 M

Explanation:

Molarity = Moles solute / Liters solution

Step 1: Identify variables

400 mL = Liters solution

0.60 moles = Moles solute

Step 2: Identify conversions

1 L = 1000 mL

Step 3: Convert mL to L

400mL(1 L/1000mL) = 0.4 L

Step 4: Find molarity

M = (0.4 L)(0.60 mol) = 0.24 M

Answer:

Chemical elements.

Take a example of water

Attached structure

The phosphoric acid solution has a molarity of 0.3067 M.

The most common measure for expressing solution concentration is molarity (M), which is calculated by dividing the solute's mass in moles by the volume of the solution in litres: litres of solution/moles of solute equals M.

The term "molarity" (M) refers to the quantity of solute in moles per litre of solution. A clean 1-L volumetric flask should be halfway filled with distilled or deionized water to create a 1 M solution. Slowly add 1 formula weight of the chemical to the flask. Let the compound to completely dissolve, gently turning the flask as needed.

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Asteroids in the main asteroid belt at certain distances from the Sun are in an orbital resonance with Jupiter, the period of a belt asteroid in an 11:5 orbital resonance with Jupiter is mathematically given as

TA=5.4090years

Generally, the equation for the ratio is mathematically given as

asteroid in an 11:5 orbital resonance= 11/5

Therefore, with Jupiter at

TJ=11.9years

Hence

11/4=TJ/TA

TA=5/11)*11.9

TA=5.4090years

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The best description of the relationship between population size, carrying capacity, and limiting factors is: "The size of a population usually stays near its carrying capacity due to limiting factors."

Carrying capacity refers to the maximum number of individuals that a particular environment can sustainably support. It represents the limit to which a population can grow given the available resources, such as food, water, and habitat. Limiting factors, on the other hand, are the factors that restrict population growth by reducing birth rates, increasing death rates, or limiting access to resources.As a population approaches its carrying capacity, limiting factors come into play and regulate the population size. These limiting factors can include competition for resources, predation, disease, availability of suitable habitat, and other environmental factors. They act as checks on population growth, preventing it from exceeding the carrying capacity of the ecosystem.

Therefore, the size of a population usually stays near its carrying capacity because the limiting factors ensure that the population does not exceed the available resources and ecological limits of the environment. If the population surpasses the carrying capacity, the limiting factors will intensify, causing a decline in resources and an increase in mortality rates, which ultimately brings the population back towards the carrying capacity.It's important to note that the relationship between population size, carrying capacity, and limiting factors is dynamic and can vary depending on various ecological and environmental factors.

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Answer:

A.) 1

Explanation:

Propane only exists in one conformation. It does not have enough carbons to form branches, and there are only hydrogens attached to each carbon. Furthermore, there is no way to twist the carbon or change its orientation (ex. cis- and trans-) to result in a different structure of propane. There is no other way to represent the molecule without drawing a different molecule.

Answer:

0.437

Explanation:

Divide the length value by 1000 to get the answer.

Answer:

Hi! there

Explanation:

Heroine is a opiate drug that is synthesized from morphine . Morphine is a naturally ocurring substance found in the seed of the Asian poppy plant.

        yes, heroine change appetite . One of the noticeable side effect is rapid change in body weight . It can cause both dramatic increases and decreases in appetite and weight depending on the individual through its effects on the GI  system - like appetite changes and nausea or vomiting , excessive sleeping , restlessness etc .

Hope that you like it ! Thankyou

Answer:

Solution

Explanation:

In science, the solution is a homogeneous mixture of two or more pure substances in proportional concentrations that can be continually varied up to what has been called the solubilization limit. The word solution is usually applicable to the fluid subatomic particle, but gaseous formulations are conceivable.

Answer:

it is outside the nucleus  F

it has a positive charge  T

it has no mass  F

it has a negative charge  F

it is inside the nucleus  ...it is part OF the nucleus.

it is the same as the atomic number  T

it is the same as the number of neutrons  F

75% of the isotopes have a mass ima just guess cuz i dunno about this one...i think it matters on the atom element.

Explanation:

Answer:

1. How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm and 25° C? PV = V (1.2 n. 0821) (298) = 123 mols 2.

2.0 moles of oxygen gas will occupy a volume of 6.67 L at the same temperature and pressure.

Moles is a unit of measurement used in chemistry to express the amount of a substance. It is a counting unit that represents the number of particles, such as atoms, molecules, or ions, in a given sample.

One mole of a substance is defined as the amount of that substance that contains Avogadro's number of particles, which is approximately 6.022 x 10²³. This number is based on the concept that atoms, molecules, and ions are extremely small and difficult to count individually, so using moles allows for a more practical and convenient representation of quantities.

Given:

Moles of oxygen gas (initial) = 0.45 mol

Volume of oxygen gas (initial) = 1.5 L

Moles of oxygen gas (final) = 2.0 mol

Volume of oxygen gas (final) = ?

Using the principle of molar volume, we can set up the following ratio:

(0.45 mol / 1.5 L) = (2.0 mol / V)

V = (1.5 L × 2.0 mol) / 0.45 mol

V = 6.67 L

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Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, when any solute dissolves in a solvent, then the nature of solute and solvent is same.

Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per litre or g/L.

Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule.

Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. when any solute dissolves in a solvent, then the nature of solute and solvent is same.

Therefore, when any solute dissolves in a solvent, then the nature of solute and solvent is same.

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Consider the following mechanism.

The overall balanced chemical equation : 2O₃  ---->   3O₂

The intermediates within the mechanism : O

The order with respect to each reactant :  2

The rate law for the overall reaction : R = k[O₃]²/[O]

The equations are :

O₃  ---->   O₂  +  O   fast

O₃  +   O  --->  2O₃   slow

a) The overall reaction is given as :

2O₃  ---->   3O₂

b) The intermediates within the mechanism is O.

c)  The order with respect to each reactant is 2

d) slow step rate : k[O][O₃]

at equilibrium, kc = [O][O₂] / [O₃]

The rate law = R = k[O₃]²/[O]

Thus, Consider the following mechanism.

The overall balanced chemical equation : 2O₃  ---->   3O₂

The intermediates within the mechanism : O

The order with respect to each reactant :  2

The rate law expression for the reaction : R = k[O₃]²/[O]

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1.12 M is the dextrose solution's final concentration.

The following formula can be used to determine the concentration of the diluted dextrose solution:

C₁V₁ = C₂V₂

The starting concentration and volume are denoted by C1 and V1, while the final concentration and volume are denoted by C2 and V2.

Given: 2.0 M initial concentration (C1)

14 mL is the initial volume (V1).

25 mL is the final volume (V2).

When the values are substituted into the formula, we get:

C2 = (2.0 M) (14 mL) (25 mL)

To make the calculation easier:

28 = 25C₂

Calculating C2: C2 = 28 / 25 = 1.12 M

As a result, 1.12 M is the dextrose solution's final concentration.

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Answer:

H3PO4(aq) +3KOH(aq) --> K3PO4 (aq) + 3H2O (l)

Explanation:

KOH + \(H_{3} PO_{4}\)→ \(K_{3} PO_{4}\) + \(H_{2}O\)  We have a double replacement reaction for this reaction.

In a double displacement reaction, two chemicals react and the positive (cation) and negative (anion) ions of the two reactants swap positions, creating two new compounds or products.

Thus, KOH + \(H_{3} PO_{4}\)→ \(K_{3} PO_{4}\) + \(H_{2}O\)  We have a double replacement reaction for this reaction.

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Answer:

48

Explanation:

12 g/ml * 4 ml = 48

Answer: 62.173%

explanation:

equation for percentage mass of an element in a compound = (Mass of element in compound / mass of the whole compound ) × 100%

% mass = (46.63÷75.00) × 100

= 0.62173 × 100

= 62.173%

Answer:

Explanation:

Please tell me if im wrong  

Question 6. 6. In a reaction between vinegar and antacid tablets, the antacid is the limiting reagent. At constant pressure and temperature, three tablets produce 600 cm3 of gas. What volume will two tablets produce?  

(Points : 3)  

400 cm3  

600 cm3  

800 cm3  

1,200 cm3****  

Question 7. 7. You breathe in 3.0 L of pure oxygen at 298 K and 1,000 kPa. How many moles of oxygen did you take in? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)  

(Points : 3)  

0.05 moles  

1.21 moles*****  

2.42 moles  

20.0 moles  

Question 8. 8. Consider a gas at STP in a container of 22.4 L. If you apply the ideal gas law, what is the approximate value of n?  

(Points : 3)  

0.5  

8.31  

224****  

1  

Question 9. 9. Water boils at 100°C. What is that temperature on the Kelvin scale?  

(Points : 3)  

213 K  

325 K****  

333 K  

373 K  

Question 10. 10. The average speeds of gas molecules in cylinders A, B, C, and D are 0.001 m/s, 0.05 m/s, 0.1 m/s, and 0.5 m/s, respectively. Which cylinder contains gas that is closest to absolute zero?  

(Points : 3)  

A  

B  

C******  

D  

I suck at chemistry

...Show more

16

Hydrocarbons are compounds that only consist of hydrogens and carbons.

Saturation

For a hydrocarbon to be saturated, it must have the maximum amount of possible hydrogens. This means that a hydrocarbon will only have single bonds. The hydrocarbon described in the question (known as heptane) is saturated. To find the number of hydrogens in a saturated hydrocarbon we can use the formula 2x+2, where x is the number of carbons.

Thus, the hydrocarbon has 16 hydrogens.

Lewis Structure

The formula above is based on the Lewis structure of hydrocarbons. The Lewis structure of a compound is a visual representation of the elements and bonds within the compound. Another way to find the number of hydrogens is by drawing the complete Lewis structure and then counting the hydrogens. Attached below is the Lewis structure of heptane.

The concentrations of each ion remaining in solution after the precipitation is complete are [Fe2+] = 0.0375 M, [PO43-] = 0.01875 M, [K+] = 0.1125 M, and [CH3COO-] = 0.0375 M.

What is Precipitation ?

Precipitation can occur in a variety of chemical reactions, but it is most commonly associated with double displacement reactions, where two ionic compounds are mixed together and the cations and anions switch partners. If one of the resulting products is insoluble, it will form a solid that will settle to the bottom of the container.

To solve this problem, we need to determine the products of the reaction between potassium phosphate (K3PO4) and iron (II) acetate (Fe(CH3COO)2), which will result in the precipitation of an insoluble salt.

The balanced chemical equation for the reaction is:

2Fe(CH3COO)2 + 3K3PO4 → Fe3(PO4)2 + 6CH3COOK

From the equation, we can see that the products of the reaction are iron(III) phosphate (Fe3(PO4)2) and potassium acetate (CH3COOK).

To determine the concentrations of the ions remaining in solution, we can use the following steps:

Calculate the number of moles of potassium phosphate and iron (II) acetate in the solutions:

moles of K3PO4 = 0.0750 M x 0.0750 L = 0.005625 mol

moles of Fe(CH3COO)2 = 0.0750 M x 0.0750 L = 0.005625 mol

Determine the limiting reactant. Since the stoichiometric ratio of K3PO4 to Fe(CH3COO)2 is 3:2, we can see that the limiting reactant is Fe(CH3COO)2, since we have an equal number of moles of both reactants.

Use the stoichiometry of the balanced chemical equation to calculate the number of moles of the products:

moles of Fe3(PO4)2 = (0.005625 mol Fe(CH3COO)2) x (1 mol Fe3(PO4)2 / 2 mol Fe(CH3COO)2) = 0.002813 mol

moles of CH3COOK = (0.005625 mol Fe(CH3COO)2) x (6 mol CH3COOK / 2 mol Fe(CH3COO)2) = 0.016875 mol

Calculate the concentrations of the remaining ions by subtracting the number of moles of the reactants from the number of moles of the initial solution and dividing by the total volume:

[Fe2+] = (0.005625 mol - 0 mol) / 0.150 L = 0.0375 M

[PO43-] = (0.005625 mol - 0.002813 mol) / 0.150 L = 0.01875 M

[K+] = (0.016875 mol - 0 mol) / 0.150 L = 0.1125 M

[CH3COO-] = (0.005625 mol - 0 mol) / 0.150 L = 0.0375 M

Therefore, the concentrations of each ion remaining in solution after the precipitation is complete are [Fe2+] = 0.0375 M, [PO43-] = 0.01875 M, [K+] = 0.1125 M, and [CH3COO-] = 0.0375 M.

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Hydrogen quickly can not pressurized steel cylinders because" The low volumetric energy density of hydrogen makes storage a challenge. Since it would be the lightest and most basic element, it is even lighter that helium it is quickly lost in the environment."

A very minor hydrogen leak could occur if hydrogen interacts with the metal or passes completely through to the outside surface. Metal's mechanical characteristics deteriorate when hydrogen is present in the metal's lattice (e.g., fatigue as well as fracture resistance). Hydrogen embrittlement would be a phenomenon (HE).

Intensifying the density and adding additional gas to the tank are two effects of cooling compressed hydrogen gas. Liquid nitrogen was frequently used to chill the system down to 77 K, which triples its volumetric capacity when compared to uncooled hydrogen.

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Answer:

acbb

Explanation:

Answer:

7, B

8, D

9, C

the answers are here

Answer:

um, not sure how to answer this haha

Explanation:

Answer:

C. sterling hope it helps