Calculate the mass (in g) of 5.86x10^20 SO3 molecules.

Answer:

The chemical formula of barium phosphate is Ba3(PO4)2.

Explanation:

brainlest ples :(

If a dilute solution of hydrochloric acid (HCl) is electrolyzed, the gas produced at the anode (positive electrode) will be chlorine gas (Cl₂). When a dilute solution of hydrochloric acid (HCl) is electrolyzed, it undergoes a process called electrolysis.

In the case of hydrochloric acid, it dissociates into hydrogen ions (H+) and chloride ions (Cl-). The positive hydrogen ions (H+) are attracted to the cathode (negative electrode) and are involved in the reduction reaction. At the cathode, hydrogen gas (H₂) is produced as a result of the reduction of H+ ions. At the anode (positive electrode), the chloride ions (Cl-) are attracted. Here, the chloride ions undergo oxidation, losing electrons and forming chlorine gas (Cl₂). The chlorine gas is released as a product of the reaction at the anode.

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Answer:

Explanation:

Answer in attached file .

Answer:

1.01×10⁻¹⁶ moles (to 3 significant figures)

Explanation:

Using avocado's constant, we can use it to find the number of moles (x) for 61,000,000 atoms of Ne:

1 mole = 6.02×10²³ atoms

x = 61,000,000 atoms

We can solve this by cross-multiplying:

6.02×10²³ × x = 1 × 61,000,000

6.02×10²³x = 61,000,000

To solve for x, divide both sides by 6.02×10²³x:

\( \frac{6.02×10²³x}{6.02×10²³} = \frac{61,000,000}{6.02×10²³ } \)

This cancels out both 6.02×10²³ on the left

\(x = \frac{61,000,000}{6.02×10²³ } \)

\(x = 1.01 \times 10⁻¹⁶\)

Answer:

4 millllllermeeters jb

Answer:

C

Explanation:

The atomic greatest radius is magnisium

The volume of glucose C6H12O6 that has a billion molecules \(1.00*10^{9}\) carbon atoms is 0.299 g, rounded to 3 significant digits.

Glucose (C6H12O6) has a molar mass of 180.156 g/mol

To calculate the mass of glucose containing a billion carbon atoms, we need to convert the number of carbon atoms to moles.

\(1.00*10^{9} carbon atoms = \frac{(1.00*10^{9})}{(6.022*10^{23}) }moles= 1.66*10^{-15} moles\)

Now, we need to multiply the number of moles of glucose by the molar mass of glucose to get the mass of glucose containing a billion carbon atoms.

Mass of glucose

\(= (1.66*10^{-15} moles) * (180.156 g/mol)\\= 0.299 g\)

Therefore, the mass of glucose C6H12O6 that contains a billion \(1.00*10^{9}\) carbon atoms is 0.299 g, rounded to 3 significant digits.

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The possible quantum numbers for 5f are :

Each orbital in an atom consists of 4 quantum numbers  

n is the principal quantum number ---> describes the size of the orbitals  

l is the angular momentum / azimuthal quantum number -> describes the shape of the orbitals.  

ml, the magnetic quantum number -> describes the orientation of orbitals in space  

ms, the electron-spin quantum number ---> describes the spin of electrons  

Value of n: positive integer  

value of l: s = 0, p = 1, d = 2, f = 3, ... (n-1)  

ml value: between -l to + l  

ms value: +1/2 or -1/2  

So the possible quantum numbers for 5f are :

Because the answer choices are not very clear, please see the composition I have described above

Answer:

We can use the equation for the dissociation of a weak acid:

HA + H2O ⇌ H3O+ + A-

The equilibrium constant expression (Ka) is:

Ka = [H3O+][A-]/[HA]

We are given the initial concentration of the acid (0.49 M) and the concentration of the acid at equilibrium (0.36 M). We can use the concentration change to determine the concentration of H3O+ and A- at equilibrium.

Let x be the concentration of H3O+ and A- at equilibrium. Then, at equilibrium, the concentration of HA is (0.49 - x).

We know that the equilibrium concentration of HA is 0.36 M, so we can set up the following equation:

0.36 = 0.49 - x

Solving for x, we get:

x = 0.49 - 0.36 = 0.13 M

Now we can plug in the equilibrium concentrations into the Ka expression:

Ka = [H3O+][A-]/[HA] = (0.13)(0.13)/(0.36) = 0.0481

Rounding to two significant figures, Ka for this acid is 0.048.

The equilibrium constant of an acid's dissociation reaction is known as the acid dissociation constant, or Ka. The strength of an acid in a solution is numerically represented by this equilibrium constant. Here the value of Ka is 0.0481.

The difference between strong and weak acids is determined by the acid dissociation constant (Ka). As Ka rises, the acid dissociates more. Therefore, strong acids must dissociate more in water. On the other hand, a weak acid has a lower propensity to ionise and release a hydrogen ion, resulting in a less acidic solution.

Here the dissociation constant Ka = [H₃O⁺][A⁻]/[HA]

Let x be the concentration of H₃O⁺ and A⁻ at equilibrium. Then, at equilibrium, the concentration of HA is (0.49 - x). We know that the equilibrium concentration of HA is 0.36 M, so we can set up the following equation:

0.36 = 0.49 - x

Solving for x, we get:

x = 0.49 - 0.36 = 0.13 M

Now we can plug in the equilibrium concentrations into the Ka expression:

Ka = [H₃O⁺][A⁻]/[HA] = (0.13)(0.13)/(0.36) = 0.0481

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Answer:

answer is a

Explanation:

ik cause i did this before

Answer:

\(pH=4.56\)

Explanation:

Hello there!

In this case, given the Henderson-Hasselbach equation, it is possible for us to compute the pH by firstly computing the concentration of the acid and the conjugate base; for this purpose we assume that the volume of the total solution is 0.025 L and the molar mass of the sodium base is 234 - 1 + 23 = 256 g/mol as one H is replaced by the Na:

\(n_{acid}=\frac{0.2g}{234g/mol}=0.000855mol\\\\n_{base}= \frac{0.2g}{256g/mol}=0.000781mol\)

And the concentrations are:

\([acid]=0.000855mol/0.025L=0.0342M\)

\([base]=0.000781mol/0.025L=0.0312M\)

Then, considering that the Ka of this acid is 2.5x10⁻⁵, we obtain for the pH:

\(pH=-log(2.5x10^{-5})+log(\frac{0.0312M}{0.0342M} )\\\\pH=4.60-0.04\\\\pH=4.56\)

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The negative log of the hydrogen ion concentration of a solution - pH

The product of a neutralization reaction, a substance consisting of a positive ion from the base and a negative ion from the acid - salt

The reaction which occurs between acids and bases - neutralization

We know that the pH of a solution has to do with the amount of the acidity and the alkalinity of a solution. We know that the pH scale has been calibrated from 0 - 14. The range of the values from 0 -6 has been classed as as acidic. The number 7 has been shown to be a neutral solution while the numbers 8 - 14 has been shown to be a basic solution.

In a neutralization reaction, we would see the combination of an acid and a base so as to be able to produce salt and water and this kind of reaction would now produce a solution that has a neutral pH.

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The magnetic fields are repelling each other. The magnetic impact on flowing electric charges, electric currents, and magnetic substances is described by a magnetic field, which is a vector field, hence options D, D, B, A, and C are correct.

A force perpendicular to the charge's own velocity and the magnetic field acts on it while the charge is travelling through a magnetic field.

An area of space containing a magnet, electric current, or moving charged particle where any other magnet, electric current, or moving charged particle is subject to a magnetic force.

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Answer:

c. alcohol oxidation

Explanation:

The police often use a device called a breathalyzer to test drivers suspected of being drunk. The chemical basis of this device is a redox reaction. A sample of the driver’s breath is drawn into the breathalyzer, where it is treated with an acidic solution of potassium dichromate. The alcohol (ethanol) in the breath is  converted to acetic acid as shown in the following equation:

3 CH₃CH₂OH + 2 K₂Cr₂O₇ + 8H₂SO₄   → 3 CH₃COOH + 2 Cr₂(SO₄)₃ + 2 K₂SO₄ +1 11H₂O

ethanol + potassium dichromate (orange yellow)  + sulfuric acid → acetic acid +  chromium(III) sulfate (green) + potassium sulfate + water

In this reaction, the ethanol is oxidized to acetic acid and the chromium(VI) in the orange-yellow dichromate ion is reduced to the green chromium(III) ion. The driver's blood alcohol level can be determined readily by measuring the degree of this color change (read from a calibrated meter on the instrument).

Answer:

correct will be from back to the start:

grass-grasshopper-toad-snake-hawk

Explanation

ood chain begin with plant-life and end with animal-life.

Answer:

Gravity

Explanation:

Answer: gravity

Explanation: gravity has is an “invisible force” that holds matter down instead of floating off into space.

You would need to take 5 mL of the 12 M acid and then make up to the 2000 mL mark.

The dilution formula is a mathematical expression used to calculate the new concentration of a solution . The dilution formula can be used to calculate the volume of a solution required in dilution. To use the formula, you must ensure that the units of concentration and volume are consistent

The final concentration of the solution is = Antilog (-1.5) = 0.03 M

Then;

12 * V = 2 * 0.03

Where V is the initial volume of the acid.

V = 0.005 L or 5 mL

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Answer:

Explanation:

Here, we want to give a definition

Delta H of a reaction is the change in ethalpy that occurs at the end of the reaction. It is the end result of heat changes that occur in a chemical reaction

It describes what occurs at the end of the reaction

For instance, it is negative for an exothermic reaction which indicates that heat is given off. It is positive for an endothermic reaction, meaning heat is absorbed

Mathematically:

Answer:

Here's your answer.

M(C3H8) = 44 g/mol

n(C3H8) = 5000 (g)/44 (g/mol) = 113,6 mol

\( N = n \times N_{a} = 113,6 \times 6,02 \times {10}^{23} \\ \\ = 684,1 \times 10 ^{23} \sf{molecules} \)

Answer:

1. B

2.B

3.B

4.C

5.C

Explanation:

I hope this help you

Calculating relative atomic mass of an element is ordered sequentially as followed:

Part 2:

1. Relative atomic mass of Magnesium =

((23.99 x 0.787) + (24.99 x 0.1013) + (25.98 x 0.1117)) / 100 = 24.31 amu

a) Percentage abundance of silver-109 =

100% - 51.86% = 48.14%

b) Average atomic mass of silver = (106.90509 x 0.5186) + (108.90470 x 0.4814) = 107.8682 amu.

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1.598moles

According to the Avogadro's constant;

1 mole of an atom = 6.02 * 10^23 molecules

If there are 9.62 x 10^23 atoms of iron, the number of moles it contains is expressed as:

Hence the required moles of iron is 1.598moles

Vanadium(II) sulfate

Vanadium(III) sulfate is the inorganic compound with the formula V2(SO4)3

Answer:

41826.05 Calories

Explanation:

1 J = 0.239006 Calories

175 KJ

= 175 x 1000 J

= 175000 J

175000 J to Calories

= 175000 x 0.239006

= 41826.05 Calories

Answer: 41.8

Explanation:

Acellus verified ✅

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

The answer is D) 51.2%

Explanation:

5.12g of 10.00g of the substance is water:

percentage of water= 5.12 x 10.00 =51.2%

Answer:

b

Explanation:

1. The name of the compound is 2-ethyl-1-butene

2. The name of the compouund is 1-chloro-1-propene

3. The name of the compouund is trans-2,3-dibromo-2-pentene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is 2-ethyl-1-butene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is 1-chloro-1-propene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is trans-2,3-dibromo-2-pentene

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