Which one of the following pairs of atoms would form a non-polar covalent bond?

a. Cl and C1

b. Na and Cl

C. C.and o

d. N and O

The piece of evidence that best identifies the type of reaction as nuclear or chemical is: Chemical, because a new substance is formed. Option 4

In this scenario, the observation that a new substance is formed is a key characteristic of a chemical reaction. Chemical reactions involve the rearrangement of atoms to form different substances with distinct properties. The formation of a new substance indicates a chemical change has occurred.

The other pieces of evidence listed do not necessarily point to a nuclear reaction:

Chemical, because energy is released during the reaction: Energy can be released in both nuclear and chemical reactions, so this observation alone is not sufficient to determine the type of reaction.

Nuclear, because energy is released during the reaction: While energy can be released in nuclear reactions, it is not exclusive to them. Chemical reactions can also release energy, such as in exothermic reactions.

Nuclear, because the mass decreased after the reaction: This observation suggests a change in mass, which could be indicative of a nuclear reaction. However, it is important to consider that chemical reactions can also involve changes in mass, such as the formation of gases or dissolution of a solid.

Overall, the most conclusive evidence to identify the type of reaction is the formation of a new substance, which aligns with a chemical reaction.

Option 4

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Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

Answer:

88.2 gram of aluminium .

Explanation:

6Li + Al₂ ( SO₄)₃ = 3Li₂SO₄ + 2Al

6 x 7 g                                    2 x 27 g

42 gram of lithium produces     54 gram of aluminium

68.6 gram of lithium will produce   88.2 gram of aluminium .

88.2 gram of aluminium will be produced.        

The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

A. The maximum theoretical yield of the gaseous product in grams is 0.037 g

B. The grams of the excess reagent are left over is 0.97 g

C. The pH of the HBr solution is 1.37

D. The OH¯ concentration of the HBr solution is 2.33×10¯¹³ M

E. The volume (in mL) of the gaseous product is 323 mL

F. The new temperature of the gas is 61 °C

We'll begin by calculating the mole of HBr in the solution. This is illustrated below:

Molarity = mole / Volume

Mole = molarity × volume

Mole of HBr = 0.043 × 0.8506

Mole of HBr = 0.0366 mole

Thus, the mass of HBr can be obtained as follow:

Mass = mole × molar mass

Mass of HBr = 0.0366 × 81

Mass of HBr = 2.96 g

Balanced equation

Ca + 2HBr --> CaBr₂ + H₂

Molar mass of Ca = 40 g/mol

Mass of Ca from the balanced equation = 1 × 40 = 40 g

Molar mass of HBr = 81 g/mol

Mass of HBr from the balanced equation = 2 × 81 = 162 g

Molar mass of H₂ = 2 g/mol

Mass of H₂ from the balanced equation = 1 × 2 = 2 g

SUMMARY

From the balanced equation above,

40 g of Ca reacted with 162 g of HBr to produce 2 g of H₂

Next, we shall determine the limiting reactant.

From the balanced equation above,

40 g of Ca reacted with 162 g of HBr.

Therefore,

1.7 g of Ca will react with = (1.7 × 162) / 40 = 6.885 g of HBr.

Since a higher amount of HBr is needed, therefore HBr is the limiting reactant and Ca is the excess reactant

Finally, we shall determine the maximum theoretical yield of the gaseous product. details below

From the balanced equation above,

162 g of HBr reacted to produce 2 g of H₂.

Therefore,

2.96 g of HBr will react to produce = (2.96 × 2) / 162 = 0.037 g of H₂

Thus, The maximum theoretical yield of the gaseous product obtained is 0.037 g

Ca is the excess reactant

From the balanced equation above,

162 g of HBr reacted with 40 g of Ca.

Therefore,

2.96 g of HBr will react with = (2.96 × 40) / 162 = 0.73 g

Thus, the mass of the excess reactant leftover can be obtained as illustrated below:

Mass of excess reactant leftover = 1.7 - 0.73

Mass of excess reactant leftover = 0.97 g

pH = –Log H⁺

pH = –Log 0.043

pH = 1.37

[H⁺] × [OH¯] = 10¯¹⁴

0.043 × [OH¯] = 10¯¹⁴

Divide both side by 0.043

[OH¯] = 10¯¹⁴ / 0.043

[OH¯] = 2.33×10¯¹³ M

Using the ideal gas equation, the volume of the gas can be obtained as follow:

PV = nRT

Divide both side by P

V = nRT / P

V = (0.0185 × 0.0821 × 362) / 1.7

V = 0.323 L

Multiply by 1000 to express in mL

V = 0.323 × 1000

V = 323 mL

The new temperature of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(1.7 × 0.323) / 362 = (0.329 × 1.54) / T₂

Cross multiply

1.7 × 0.323 × T₂ = 362 × 0.329 × 1.54

Divide both side by 1.7 × 0.323

T₂ = (362 × 0.329 × 1.54) / (1.7 × 0.323 )

T₂ = 334 K

Subtract 273 to obtain answer in °C

T₂ = 334 – 273 K

T₂ = 61 °C

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Answer:

fan is a powered machine used to create a flow of air. A fan consists of a rotating arrangement of vanes or blades, ... Most fans are powered by electric motors

Sorry I didn'mean to answer this. I was thinking more along the lines of relationships.

Explanation:

Answer:

Chemical reactions make and break the chemical bonds between molecules, resulting in new materials as the products of the chemical reaction. Breaking chemical bonds absorbs energy,while new bonds releases, energy with the overall chemical reaction being endothermic or exothermic.

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer: ≈ 13620g³m

Explanation:

A = m d

1Lb = 454g

1000g = 1kg

m = 120Lb × 454/1Lb ×1kg/1000g ≈ 1362Lb/25g kg

m = 10.0 mg / kg

A = m d

(1362kg) ( 10.0 mg/kg)

≈ 13620g³m

A combustion reaction is a type of chemical reaction that involves the rapid combination of fuel (typically a hydrocarbon) with oxygen, resulting in the release of energy in the form of heat and light.

Combustion reactions are often characterized by the presence of a flame and the production of carbon dioxide (CO₂) and water (H₂O) as products.

In the given balanced combustion reaction:

C₂H₂ + 5O₂ → 4H₂O + 2CO₂

The stoichiometric ratio indicates that 1 mole of C₂H₂ reacts with 2 moles of CO₂ produced. Therefore, if 4.44 moles of C₂H₂ react, we can calculate the moles of CO₂ produced using the ratio:

Moles of CO₂ = (4.44 mol C₂H₂) × (2 mol CO₂ / 1 mol C₂H₂)

Moles of CO₂ = 8.88 mol

Therefore, 8.88 moles of CO₂ will be produced in the combustion reaction.

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Answer:

read and green

Explanation:

By convention, the three primary colors in additive mixing are red, green, and blue. In the absence of light of any color, the result is black. If all three primary colors of light are mixed in equal proportions, the result is neutral (gray or white). When the red and green lights mix, the result is yellow.

Answer:

ground tumeric

Explanation:

Mix 1/4 cup water and 1/2 teaspoon of ground tumeric

1. The reaction mixture with the largest amount of product(s) when at equilibrium is the one with the largest Keq value.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium.

1. In this case, the reaction mixture with the largest Keq value is Reaction 2. This is because the equilibrium constant, Keq, is a measure of the relative concentrations of the products and reactants at equilibrium. A large Keq value indicates that the equilibrium lies far to the right, meaning that there are more products than reactants at equilibrium.

2. The reaction mixture with the largest amount of reactants when at equilibrium is the one with the smallest Keq value. In this case, the reaction mixture with the smallest Keq value is Reaction 4. This is because a small Keq value indicates that the equilibrium lies far to the left, meaning that there are more reactants than products at equilibrium.

3. The reactions in the table that have concentrations that represent the systems at equilibrium are Reactions 1 and 3. This is because the concentrations of the products and reactants in these reactions are equal, which is the definition of equilibrium.

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or products so that the ratio represents the system at equilibrium. For example, to bring Reaction 2 to equilibrium, we could increase the concentration of H2O or decrease the concentration of CO2.

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Reaction Keq Concentrations at Equilibrium

1 1000 H2O:CO2 = 1:1

2 10 H2O:CO2 = 10:1

3 0.01 H2O:CO2 = 100:1

4 0.001 H2O:CO2 = 1000:1

On the basis of the Keq values given in the table, which reaction mixture contains the largest amount of product(s) when at equilibrium? Explain.

2. Which reaction mixture contains the largest amount of reactants when at equilibrium?

3. Which reactions in the table have concentrations that represent the systems at equilibrium?

4. For each reaction that is not at equilibrium, change the concentration of only one of the reactants or

products so that the ratio represents the system at equilibrium

Answer:

k= 1.5

[A] = 1 M

[B] = 3 M

m = 2

n = 1

Explanation:

rate = k[A]”[B]"

The rate of the reaction is 4.5 mol L⁻¹s⁻¹.

Rate of a reaction is defined as the change in concentration of any one of the reactants or products of the reaction, in unit time.

Here,

The concentration of A, [A] = 1 M

The concentration of B, [B] = 3 M

The partial order with respect to A, m = 2

The partial order with respect to B, n = 1

The rate constant of the reaction, k = 1.5

The rate of the reaction,

r = k[A]^m [B}^n

r = 1.5 x 1² x 3

r = 4.5 mol L⁻¹s⁻¹

Hence,

The rate of the reaction is 4.5 mol L⁻¹s⁻¹.

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Answer:

Option C. 24 days / 4 grams

Explanation:

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

Days Elapsed >>>> Mass Remaining

0 >>>>>>>>>>>>>>> 16

12 >>>>>>>>>>>>>>> 11

24 >>>>>>>>>>>>>>> 8

36 >>>>>>>>>>>>>>> 6

A. Determination of the half-life of Thorium-234.

To determine the half-life, it is important to know the definition of half life.

Half-life is defined as the time taken for a substance to reduce to half its original mass.

From the table given above, we can see that the original mass of the isotope is 16 g (i.e at 0 day). By day 24, the mass of the isotope is 8 g (i.e half the original mass). Thus, the half-life of the isotope is 24 days.

B. Determination of the mass of the isotope remaining after 2 half lives.

Original amount (N₀) = 16 g

Number of half-lives (n) = 2

Amount remaining (N) =?

N = 1/2ⁿ × N₀

N = 1/2² × 16

N = 1/4 × 16

N = 4 g

Thus, 4 g of the isotope is remaining after 2 half lives.

Summay:

Half-life = 24 days

Amount remaining after 2 half-lives = 4 g

Option C gives the correct answer to the question.

To prepare 12 capsules each containing 80 mg of morphine sulfate and 3.2 mg of naltrexone hydrochloride, the following calculations can be used:

Calculate the total weight of the morphine sulfate and naltrexone hydrochloride: 80 mg + 3.2 mg = 83.2 mg

Calculate the weight of the diluent required: 12 capsules * 83.2 mg/capsule = 999.6 mg

Calculate the volume of the diluent required based on its density (assume a density of 0.9 g/mL for lactose): 999.6 mg / (0.9 g/mL) = 1.11 mL

Calculate the weight of the diluent required based on its volume: 1.11 mL * 0.9 g/mL = 1 g

Calculate the amount of the diluent required based on the sensitivity of the prescription balance: 1 g / (6 mg/g) = 166.7 mg

The amount of the diluent required according to this calculation is 166.7 mg. This amount should be rounded up to the nearest whole number (167 mg) to account for the 4% error tolerance. The final aliquot would therefore contain 167 mg of lactose, 80 mg of morphine sulfate, and 3.2 mg of naltrexone hydrochloride.

Answer:

the pasta will soften

Explanation:

the pasta will boil and will soften up as a result of it being regular pasta

Answer:

BROMOTRIPHENYLSILANE

Explanation:

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Answer:

2.29 moles of SF₆ contain 334.5 g SF₆

Explanation:

Given data:

Mass of SF₆ = ?

Number of moles of SF₆ = 2.29 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of SF₆ = 32.065 + (19)×6

Molar mass of SF₆ = 146.06 g/mol

Now we will put the values in formula.

Mass = 2.29 mol ×  146.06 g/mol

Mass = 334.5 g

2.29 moles of SF₆ contain 334.5 g SF₆ .

Answer:

Silicon

Explanation:

Therefore the isotope with 14 protons and 15 neutrons is Silicon-29.

An atom has 15 protons and 14 Neutrons. The atomic number of this atom is 14 and the element is silicon.

The atomic number of an element is its total number of protons or the total number of electrons. The atomic number is written down the element. It can be calculated by knowing the numbers of protons and electrons.

The element here is silicon, whose number of protons, electrons, and neutrons are equal, which is 14. These are the charged particles that are present in the atoms of the element.

The number of band protons is equal to an element. The atomic number will be its number of protons. The isotope with 14 protons and 15 neutrons is Silicon-29.

Thus, the atomic number of the element is 14 if it has 15 protons and 14 Neutrons. The element is silicon.

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The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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Answer:

436.8 mmHg.

Explanation:

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

Total pressure (Pₜ) = 0.93 atm

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Next, we shall convert the total pressure to mmHg . This can be obtained as follow:

1 atm = 760 mmHg

Therefore,

0.93 atm = 0.93 × 760 mmHg / 1 atm

0.93 atm = 706.8 mmHg

Finally, we shall determine the pressure of the O₂. This can be obtained as follow:

Total pressure (Pₜ) = 706.8 mmHg

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Pₜ = Pₙ₂ + Pₒ₂

706.8 = 270 + Pₒ₂

Collect like terms

706.8 – 270 = Pₒ₂

436.8 = Pₒ₂

Pₒ₂ = 436.8 mmHg

Thus, the pressure of O₂ is 436.8 mmHg

Answer:

Explanation:

A conversion factor is a number used to change one set of units to another, by multiplying or dividing. When a conversion is necessary, the appropriate conversion factor to an equal value must be used. For example, to convert inches to feet, the appropriate conversion value is 12 inches equal 1 foot. I am so sorry if i am wrong I am new at this

Answer: To create a conversion factor from this equality, write the quantity on one side of the equal sign in the numerator of a fraction, and write the other quantity in the denominator. Note that a second conversion factor could be developed by interchanging where each quantity is written, relative to the fraction bar.

Explanation:

Answer:

A.) 64

Explanation:

The mass number is the number of protons and neutrons in the nucleus, so here there are 30 protons, and 34 neutrons, so the mass number is 64

Answer:

An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

Answer:

An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.

Answer: proton and neutron

Explanation:

They both have the mass of 1

The volume of the gas sample at 93 ∘C is approximately 277 mL.

What is volume?

To solve this problem, we can use the combined gas law, which relates the initial and final states of a gas sample undergoing changes in pressure, volume, and temperature, as follows:

(P₁V₁)/T₁ = (P₂V₂)/T₂

where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures, respectively.

In this case, we are given the initial volume V₁ = 245 mL and temperature T₁ = 50 ∘C. We are asked to find the final volume V₂ at a temperature T₂ = 93 ∘C. We can assume that the pressure remains constant.

Thus, we can write:

(P₁V₁)/T₁ = (P₂V₂)/T₂

Solving for V₂, we get:

V₂ = (P₁/T₁) * (T₂ * V₁ / P₂)

Since the pressure is constant, we can cancel it out and obtain:

V₂ = (T₂/T₁) * V₁

Plugging in the given values, we get:

V₂ = (366 K / 323 K) * 245 mL ≈ 277 mL

Therefore, the volume of the gas sample at 93 ∘C is approximately 277 mL.

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Complete question is: The volume of the gas sample at 93 ∘C is approximately 277 mL.

The phrase which best describes a synthesis reaction is: A. Putting together into one

A chemical reaction can be defined as a chemical process involving the continuous transformation and rearrangement of either the ionic, atomic or molecular structure of a chemical element, especially through the breakdown and formation of chemical bonds that produces a new chemical compound.

In Chemistry, there are five (5) main types of chemical reaction and these include;

A synthesis reaction is also referred to as a combination reaction.

Hence, a synthesis reaction involves putting together two (2) different atoms into one (1), so as to form a chemical compound.

                                    \(Na + Cl --> NaCl\)

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Answer:

A scientific method is the one which is independent of the person taking the measurements. Hence, a method which includes a scientific instrument/experiment, systematic observation, measurement, testing etc and is independent of personal feelings or opinions is known as a scientific method.

The measurement of temperature, testing of the material of surface, and moisture content in the atmosphere are testable questions and part of scientific method to find the reasons of different shapes of dewdrops. whether the different shapes are formed due to change in temperature, surface or moisture content in the atmosphere or not? The result of this measurement would not depend on the scientist doing the experiment. Scientific instruments would be used which would give the same reading. But the result of the observation of most unusual shape and pleasing shape of drop is purely dependent on one observer. It cannot be generalized reason

Explanation:

Answer:

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Explanation: