Which of the following has the largest atomic radius?​

Answer:

ty sa pointd

150 grams of NaOH is approximately equal to 2.256 x 10^24 particles of NaOH.

To convert grams of NaOH to particles of NaOH, we need to use the concept of molar mass and Avogadro's number. The molar mass of NaOH is calculated by adding the atomic masses of sodium (Na), oxygen (O), and hydrogen (H) together. It can be determined as follows:

Na: 22.99 g/mol

O: 16.00 g/mol

H: 1.01 g/mol

Molar mass of NaOH = (22.99 g/mol) + (16.00 g/mol) + (1.01 g/mol) = 40.00 g/mol

Now, we can use the molar mass to convert grams of NaOH to moles. Since 1 mole contains Avogadro's number (approximately 6.022 x 10^23) particles, we can determine the number of particles as follows:

150 g NaOH * (1 mol NaOH / 40.00 g NaOH) * (6.022 x 10^23 particles / 1 mol NaOH) ≈ 2.256 x 10^24 particles

It's important to note that this calculation assumes the substance is pure NaOH and that the molar mass and Avogadro's number are accurate.

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Answer:

protons are red neutrons are green electrons are yellow

Explanation:

TIE FIGHTERS GO ZOOOOOM

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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Explanation:

The theoretical volume of ammonia that should be produced in the Haber process if we start with 5.0 L of nitrogen (N2) at standard temperature and pressure (STP) can be calculated as follows:

1 mole of N2 reacts with 3 moles of H2 to form 2 moles of NH3

Thus, the number of moles of N2 present can be calculated using the Ideal Gas Law:

PV = nRT

Where n is the number of moles of gas, R is the gas constant, T is the temperature in Kelvin, P is the pressure in atmospheres, and V is the volume in liters.

At STP (0°C and 1 atm), the volume of one mole of gas is 24.45 L.

Given 5.0 L of N2 at STP, the number of moles of N2 can be calculated as:

n = (PV)/RT = (1 atm)(5.0 L)/(0.0821 atmL/molK)(273 K) = 1.96 moles

The number of moles of NH3 produced can then be calculated as:

n = (2 moles of NH3)/(1 mole of N2) = 2 moles/1 mole = 2 moles

The volume of NH3 can be calculated as:

V = nRT/P = (2 moles)(0.0821 atmL/molK)(273 K)/(1 atm) = 44.8 L

So, the theoretical volume of ammonia (NH3) that should be produced if we start with 5.0 L of N2 at STP is 44.8 L.

A paradigm for thinking about the philosophical assumptions underlying various disciplines of research, notably in sciences like biology, neurology, and psychology, became known as the new mechanical philosophy around the turn of the twenty-first century (or, for brevity, the new mechanism).

In this entry, we introduce and briefly summarise the distinctive features of this framework and discuss how it deals with a number of well-known issues in the philosophy of science, including explanation, metaphysics, the relationships between scientific disciplines, and the process of scientific discovery.

We show how each of these philosophical works has been reoriented by the mechanistic framework, what the new mechanism has added to the discussion, and what still has to be done.

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Answer:

heated the water

Explanation:

The data indicates a direct relationship with a positive slope.

Direct relationship is a type of relation in which if one factor increases the other will also increases and vice versa. This data represents direct relationship  because the increase occur in one value causes increase of another value so we can conclude that the data indicates a direct relationship with a positive slope.

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Answer:

a. <1.0

b. 1.30

c. 3.00

d. 11.00

e. 12.70

Answer:

C.) No. of electrons

Explanation:

A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.

B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.

C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).

D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.

Answer:

The compound is  "C6H12O6"

Explanation:

we know the relation that

Molecular formula mass = n. (Empirical formula mass)

180.8=n(30.0156)

n= 6

So

Molecular formula = n. (Empirical formula)

Molecular formula= 6 ( CH2O)

Molecular formula = C6H12O6

Taking into account definition of percent yield, the amount of water produced is 32.4 grams.  

In first place, the balanced reaction is:

2 C₂H₂ + 5 O₂ → 4 CO₂ + H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 5 moles of O₂ reacts with 2 moles of C₂H₂, 14.8 moles of O₂ reacts with how many moles of C₂H₂?

\(moles of C_{2} H_{2} =\frac{14.8 moles of O_{2}x 2 moles of C_{2} H_{2}}{5 moles of O_{2}}\)

moles of C₂H₂= 5.92 moles

But 5.92 moles of C₂H₂ are not available, 4.8 moles are available. Since you have less moles than you need to react with 14.8 moles of O₂, C₂H₂ will be the limiting reagent.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage and it is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= (actual yield÷ theorical yield)× 100%

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 2 moles of C₂H₂ form 1 mole of H₂O, 4.8 moles of C₂H₂ form how many moles of H₂O?

\(moles of H_{2} O=\frac{4.8 moles of C_{2} H_{2} x1 mole ofH_{2} O }{2moles of C_{2} H_{2}}\)

moles of H₂O= 2.4 moles

The molar mass of water is 18 g/mole. Then, the theorical mass of water formed can be calculated as: 2.4 moles ×18 g/mole= 43.2 grams

In this case, you know:

Replacing in the definition of percent yields:

75%= (actual yield÷ 43.2 g)× 100%

Solving:

75%÷100%= actual yield÷ 43.2 g

0.75= actual yield÷ 43.2 g

0.75× 43.2 g= actual yield

32.4 g= actual yield

In summary, the amount of water produced is 32.4 grams.  

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Answer:

The Orbital that involves in the boding of acetone are sigma and pi

Explanation:

Correct if I’m wrong UwU

Answer:

10.801 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (¹⁰B):

Mass of A = 10

Abundance (A%) = 19.9%

Isotope B (¹¹B):

Mass of B = 11

Abundance (B%) = 80.1%

Atomic mass of Boron =?

The atomic mass of boron can be obtained as illustrated below:

Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

= [(10 × 19.9)/100] + [(11 × 80.1)/100]

= 1.99 + 8.811

= 10.801 amu

Thus, the atomic mass of boron is 10.801 amu

The atomic mass of boron with natural abundance of 19.9% of 10 B and 80.1%  of 11 B is 10.801 amu

Boron has 2 isotopes.

First isotopes

mass = 10

% abundance = 19.9%

Second Isotopes

mass = 11

% abundance = 80.1%

Therefore,

Atomic mass = (19.9% of 10) + (80.1% of 11)

Atomic mass = (19.9 / 100 × 10) + (80.1 / 100 × 11)

Atomic mass = 199 / 100 + 881.1 / 100

Atomic mass = 1.99 + 8.811

Atomic mass = 10.801

Atomic mass = 10.801 amu

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Answer:

Reaction Rate is the reaction rate or reaction is the speed at which chemical reaction takes place.

Rate constant is the chemical kinetics a reaction rate constant or reaction rate

Answer:

4KO₂ + 2CO₂ -> 2K₂CO₃ + 3O₂

Step 1: Find the moles of O₂.

n(O₂) = mass/ Mr.

n(O₂) = 100 / 32 = 3.125 mol

Step 2: Find the ratio between KO₂ and O₂.

        KO₂    :       O₂

          4        :       3

        4/3       :       1

  (4*3125)/3  :      3.125

=4.167 mol of KO₂

Thus now we know, to produce 100 g of O₂, we need 4.167mol of KO₂

Step 3: Find the mass of KO₂:

mass = mol * Mr. (KO₂)

Mass = 4.167* 71.1

Mass = 296.25 g

Answer:

radioactive decay or solar radiation

Explanation:

When 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

The balanced chemical equation shows that 2 moles of KCIO3 decompose to produce 3 moles of O2. Therefore, we can use the stoichiometric ratio from the balanced equation to determine the number of moles of O2 formed when 2.0 moles of KCIO3 decompose.

According to the stoichiometry, 2 moles of KCIO3 produce 3 moles of O2. Therefore, we can set up a proportion:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

where x represents the unknown number of moles of O2 formed.

Simplifying the equation:

(2 moles KCIO3 / 2 moles O2) = (2.0 moles KCIO3 / x moles O2),

1 = (2.0 moles KCIO3 / x moles O2),

Cross-multiplying:

x moles O2 = (2.0 moles KCIO3 / 1),

x moles O2 = 2.0 moles KCIO3.

Therefore, when 2.0 moles of KCIO3 decompose, 2.0 moles of O2 will form.

It is important to note that this calculation assumes complete and ideal conditions, where the reaction proceeds with 100% efficiency. In reality, the actual yield of O2 may be lower due to various factors such as side reactions or incomplete decomposition. To determine the actual yield, additional information or experimental data would be required.

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The atomic mass of an element is  the total number of protons and the neutrons in a particular atom of the element.

The atomic mass unit is a standardized unit and defined as the exactly 1 / 12 the mass of a carbon -12 atom. The atomic mass or weight of any element is determined by the relative to this standard and is not a whole number, since it is an average of the masses of its naturally occurring isotopes.

The atomic mass of an element is total number of protons and the neutrons. The atomic mass is average weight of all  the isotopes of that element.

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Answer:

An alkyl halide can undergo SN2 reaction with an amine

Explanation:

The displacement of a bromine atom by an an amine (step 2---> 3) in the reaction sequence is an example of an SN2 reaction in which the amine is the nucleophile.

The nitrogen atom of the amine which bears a lone pair of electrons functions as the nucleophile and attacks the electrophilic carbon atom of the alkyl halide displacing the bromide and creating a new Carbon-Nitrogen bond. An ammonium intermediate is immediately formed and the reaction is completed by the abstraction of a hydrogen by a base (such as excess amine present in the system).

This reaction is slower with t-BuNH2 because of steric hindrance and steric crowding in the transition state. SN2 reactions are faster with methylamine where the alkyl carbon is easily accessible.

The detailed mechanism of this reaction has been attached to this answer.

Answer:

Kepler- created laws of planetary motion

Galileo- discovered moons of Jupiter; published in Italian

Copernicus-  revived Aristarchus heliocentric model

Explanation:

I hope this helps you! :)

Let me know if you need help with anything else.

101 mmHg is the total pressure in the tank.

Thus, Dalton's Law of Partial Pressures states that while the volume and temperature of a gaseous mixture are held constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components.

Nitrogen, oxygen, argon, carbon dioxide, water vapor, and a trace amount of other gases are all present in atmospheric air and pressure.

The increased oxygen content in the chamber can displace the CO bound to hemoglobin faster than air oxygen, hence the hyperbaric chambers are also used to treat carbon monoxide (CO) poisoning. The treatment of scuba divers with the bends is another application for hyperbaric chambers.

Thus, 101 mmHg is the total pressure in the tank.

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The percent yield of the reaction is 45.44%

Percentage yield is basically,

 \(\rm Percent\ yield\ = \frac{actual\ yield}{theoretical\ yield} \times 100\)

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

To calculate the theoretical yield, consider the stoichiometry of the reaction.

2 moles of NaOH reacts with 1 mole of H₂SO₄ to give 1 mole of Na₂SO₄ and 2 moles of H₂O. The mole ratio of H₂SO₄ and Na₂SO₄ is 1:1

For this mole ratio to be useful, convert the given concentration of H₂SO₄ into moles.  

     \(\rm Molarity\ =\ \frac{No.\ of\ moles}{Volume\ of\ solution (L)}\)

            \(\rm 3.10\ =\ \frac{No.\ of\ moles}{0.125}\)

\(\rm No.\ of\ moles\ =\ 3.10 \times 0.125\\)

                     \(=\ 0.38\)

Since, mole ratio of H₂SO₄ and Na₂SO₄ is 1:1

Amount of Na₂SO₄ formed would be also 0.38 mol

Convert this amount in moles to amount in grams

\(\rm No.\ of\ moles\ =\ \frac{Mass\ formed\ }{Molecular\ mass}\)

\(\rm Mass\ formed\ =\ No.\ of\ moles\times molecular\ mass\)

                     \(\rm =\ 0.38\times 142.04\)

                     \(\rm =\ 53.97\ grams\)

Theorical yield of Na₂SO₄ is 53.97 grams

Therefore,   \(\rm Percent\ yield\ = \frac{actual\ yield}{theoretical\ yield} \times 100\)

                                          \(\rm =\ \frac{24.5}{53.97}\times 100\)

                                          =  45.44%

The percent yield of the reaction is 45.44%

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The question requires us to calculate the concentration, in mol/L, of H3O+ and OH- ions for a 0.00016 M NaOH solution.

Since NaOH is a strong base, we can consider that it completely dissociates in water:

From the dissociation reaction shown above, we can say that the concentration of OH- ions in a NaOH solution will be the same as the concentration of NaOH.

Thus: [OH-] = 0.00016 mol/L

Now, we can apply the ion-product constant of liquid water (Kw) to calculate the concentration of H3O+ ions:

Since the value of [OH-] is 0.00016 M and considering the value of Kw as 1.00 x 10^-14, we calcuate [H3O+]:

Therefore, the concentration of [OH-] and [H3O+] ions are 1.6 x 10^-4 and 6.3 x 10^-11 M, respectively.

Answer:

it should be B. earths core is composed of iron and nickel, if not let me know.

Answer: B. Earth's core is composed of iron and nickel.

Explanation: The inner core is solid so C and D are incorrect and A is incorrect because the core isn't made of magnets so it has to be B.

Explanation:

Hope u can understand my handwriting:)

The representation is showing potassium atom (K) and Chlorine atom (Cl) when it ought to show their ions i.e potassium ion (K⁺) and Chlorine ion (Cl¯)

When potassium chloride, KCl dissolves in water, it dissociate to produce potassium ion (K⁺) and Chlorine ion (Cl¯) as shown below:

KCl(aq) —> K⁺(aq) + Cl¯(aq)

The representation given in the question is only showing potassium atom (K) and Chlorine atom (Cl). This makes it wrong as dissolution of ionic compounds in water will results in the corresponding ions of the element that makes up the compound

Please see attached photo

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Answer:

0.50 Molar or 0.50 Mol/L

Explanation:

Molarity = \(\frac{Moles of Solute}{Litres of solution}\)

Molarity = n / V

Given: Volume of solution(V): 1.75 Litres

Moles of solute(n): 0.877

Substituting values,

Solution:

Molarity = \(\frac{0.877}{1.75}\)

Molarity = 0.50 Molar (rounded off to the nearest decimal place)

∴ Molarity = 0.50 Molar/ 0.50 Mol/L

Answer:

2257000 J

Explanation:

Applying,

Q = Cₓm.................. Equation 1

Where Q = amount of energy need to boil the water, Cₓ = Enthalpy of vaporization of water, m = mass of water.

From the question,

Given: Cₓ = 2257000 J/kg, m = 1 kg

Substitute these values into equation 1

Q = 2257000×1

Q = 2257000 J

Hence the energy needed to boil all of the water is 2257000 J

Answer: C. Cold air is more dense than hot air.

Explanation: Took the test on edmentum