which of the following particles are equal in number in a neutral atom?
a) Proton and neutron
b) electron and neutron
c) proton and electron
d) and
e) both​

Answer:

2.9 g of water are produced by 9.6 g of ammonium perchlorate

Note: The question is incomplete. The complete question is given below:

Ammonium perchlorate (NH₄ClO₄) is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas (N₂) , chlorine gas (Cl₂), oxygen gas (O₂), water (H₂O) , and a great deal of energy. What mass of water is produced by the reaction of 9.6 g of ammonium perchlorate? Be sure your answer has the correct number of significant digits.

Explanation:

The reaction of ammonium perchlorate (NH₄ClO₄) to produce nitrogen gas (N₂) , chlorine gas (Cl₂), oxygen gas (O₂), water (H₂O) is shown in the balanced chemical equation given below:

2 NH₄ClO₄ →  N₂ +  Cl₂ + 2 O₂ + 4 H₂O

From the equation, 2 moles of ammonium perchlorate produces 4 moles of water, i.e. mole ratio of NH₄ClO₄ to H₂O = 2 : 4 = 1 : 2

molar mass of ammonium perchlorate, NH₄ClO₄ = (14 + 4 * 1 + 35.5 +16 * 4) = 117.5

molar mass of water,  H₂O = (2 * 1 + 16) = 18.0 g

mass of water produced = moles of ammonium perchlorate * 2 * molar mass of water

moles of perchlorate = mass / molar mass = 9.6/117.5

mass of water produced = 9.6/117.5 * 2 * 18.0 g  = 2.94 g of water

Therefore, 2.9 g of water are produced by 9.6 g of ammonium perchlorate

Answer:

question 1 answer is b

Explanation:

istopes equal to same atomic number but different mass number

The pressure of N₂ gas produced when 42.57 g of NH₃ is reacted with excess NO in a sealed container is 4.95 atm

First, we shall determine the mole of 42.57 g of NH₃ that reacted. Details below:

Mole = mass / molar mass

Mole of NH₃ = 42.57 / 1 7

Mole of NH₃ = 2.50 moles

Next, we shall determine the mole of N₂ gas produced. Details below:

4NH₃ + 6NO -> 5N₂ + 6H₂O

From the balanced equation above,

4 moles of NH₃ reacted to produced 5 moles of N₂

Therefore,

2.50 moles of NH₃ will react to produce = (2.5 × 5) / 4 = 3.125 moles of N₂

Finally, we shall determine the pressure of N₂ gas produced. This is shown below:

PV = nRT

P × 28 = 3.125 × 0.0821 × 540

Divide both sides by 28

P = (3.125 × 0.0821 × 540) / 28

P = 4.95 atm

Thus, we can conclude that the pressure of N₂ gas produced is 4.95 atm

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Answer:

The compound that is not an organic alcohol is C6H5COOH.

C3H7OH is propyl alcohol, CH3CH(OH)CH3 is 2-propanol, and (CH3)2CHCH(OH)CH2CH3 is 3-pentanol, all of which are organic alcohols.

On the other hand, C6H5COOH is benzoic acid, which is not an alcohol but an organic acid. It contains a carboxylic acid (-COOH) functional group and not the -OH functional group of alcohols.

Answer:

A. Elements are pure substances.

Explanation:

Out of all four answers A would be best. Hope this helps.

Answer:

B

Explanation:

I think all options can define element in one form or another but an element is characterized by the atomic number it has i.e you will know it's Carbon due to it's number of protons, neutrons and/or electrons.

The delocalization of the positive charge onto the oxygen atom also helps explain why the reaction is regioselective for the para position.

Oxygen is a chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element that readily forms compounds (notably oxides) with almost all other elements. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.

An element is a substance composed of atoms that have the same number of protons in the atomic nucleus. Elements are characterized by their atomic number, which represents the number of protons in the nucleus. The periodic table of elements is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and chemical properties.

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Answer: 55.5 oC is 0.014 atm (3rd decimal point)

Explanation:

The Clausius-Clapeyron equation is given as:

ln(P2/P1) = -(ΔH_vap/R) * (1/T2 - 1/T1)

where:

P1 = vapor pressure at temperature T1

P2 = vapor pressure at temperature T2

ΔH_vap = enthalpy of vaporization

R = gas constant = 8.314 J/(mol*K)

Converting the enthalpy of vaporization to J/mol:

ΔH_vap = 35.2 kJ/mol = 35,200 J/mol

Converting temperatures to Kelvin:

T1 = 64.7 + 273.15 = 337.85 K

T2 = 55.5 + 273.15 = 328.65 K

Substituting the values into the equation and solving for P2:

ln(P2/1 atm) = -(35,200 J/mol / 8.314 J/(mol*K)) * (1/328.65 K - 1/337.85 K)

ln(P2/1 atm) = -4.231

P2/1 atm = e^(-4.231)

P2 = 0.014 atm

Therefore, the vapor pressure for methanol at 55.5 oC is 0.014 atm, to the third decimal point.

The term mole concept is used here to determine the number of moles of nitrogen. The number of moles of nitrogen is 17.16.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The number of moles of N₂ made from the reaction is:

52 mol CuO × 1 mol N₂ / 3 mol CuO = 17.16 moles of N₂.

Thus the number of moles of N₂ made from 52 moles of CuO are 17.16.

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(i) A mole is the amount of a substance containing 6.022 × 10²³ particles.

(ii) Compounds are formed by the chemical bonding of different elements.

(iii) Molecular mass is the sum of atomic masses in a molecule.

(iv) There are two types of mix homogeneous and heterogeneous mixtures.

(v) Free radicals are highly reactive species with unpaired electrons.

(vi) Gram formula mass is the sum of atomic masses expressed in grams per mole.

(i) Mole: A mole is defined as the quantity of a substance that has an equal number of particles that are in 12 grams of carbon-12.

It is denoted by mol and is used in chemistry to measure quantities of atoms or molecules.

Example:1 mol of oxygen gas contains 6.022 × 10²³ oxygen molecules.

(ii) Compounds: Compounds are substances made up of two or more different elements that are chemically bonded together.

They can be broken down into simpler substances through chemical reactions.

Example:Water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom that are chemically bonded together.

(iii) Molecular Mass: The molecular mass of a compound is the sum of the atomic masses of all the atoms in the molecule.

It is expressed in atomic mass units (amu) or grams per mole.

Example:The molecular mass of water (H2O) is 18.015 amu.

(iv) Types of Mixture: A mixture is a combination of two or more substances that are not chemically combined.

There are two types of mixtures - homogeneous and heterogeneous.

Example:A homogeneous mixture is a solution, such as saltwater, where the solute (salt) is evenly distributed in the solvent (water).

A heterogeneous mixture is a mixture that is not evenly distributed, such as oil and water.

(v) Free Radical: A free radical is an atom or molecule that has an unpaired electron in its outer shell and is highly reactive. They can be both harmful and helpful to the human body.

Example:A common free radical is the hydroxyl radical (OH·) that is formed by the body during metabolism.

(vi) Gram formula mass: The gram formula mass is the sum of the atomic masses of all the atoms in a compound.

It is expressed in grams per mole and is used to determine the mass of a certain number of molecules or atoms.

Example:The gram formula mass of water (H2O) is 18.015 g/mol.

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The amount, in mL, of the suspension that should be given to an infant weighing 17 lb will be 1.16 mL

0.8 mL of the liquid contains 80.0 mg of the drug.

The recommended dose is 15 mg per kg of body weight

The infant to be given the drug weighs 17 lb.

First, let's convert the weight of the infant to kg.

1 lb = 453.59 g

17 lb =       453.59 x 17/1

                   = 7711.03 g

1000 g = 1 kg

7711.03 g = 7711.03 x 1/1000

               = 7.711 kg

So, the baby's weight is 7.711 kg.

The drug dose for the baby can thus be calculated as:

15 mg x 7.711 = 115.67 mg

But 0.8 mL of the drug contains only 80.0 mg. How many mL will contain 115.67 mg?

                   0.8 x 115.67/ 80.0 = 1.16 mL

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Approximately 13,412.48 Joules of heat are required to raise the temperature of 16.1 g of water from −25 °C to 175 °C.

What is Temperature?

Temperature is a measure of the degree of hotness or coldness of a substance, object or environment. It is a physical quantity that expresses the average kinetic energy of the particles that make up a substance or system.

q = m * c * ΔT

where q is the amount of heat required (in Joules), m is the mass of the substance (in grams), c is the specific heat capacity of the substance (in J/g·°C), and ΔT is the change in temperature (in °C).

In this case, we are given the mass of water (m = 16.1 g), the initial temperature (T1 = −25 °C), and the final temperature (T2 = 175 °C).

ΔT = T2 - T1 = 175 °C - (-25 °C) = 200 °C

Next, we can use the equation above to calculate the amount of heat required:

q = m * c * ΔT

= 16.1 g * 4.184 J/g·°C * 200 °C

= 13,412.48 J

Therefore, approximately 13,412.48 Joules of heat are required to raise the temperature of 16.1 g of water from −25 °C to 175 °C.

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Answer:

CH3 is a methyl group

Explanation:

A methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms — CH3.

Answer:

40.3 grams

Explanation:

The balanced chemical equation for the reaction between aluminum (Al) and oxygen (O2) to form aluminum oxide (Al2O3) is:

4Al + 3O2 → 2Al2O3

To determine the amount of aluminum oxide produced, we need to first identify the limiting reactant, which is the reactant that gets completely used up in the reaction.

Using the given masses of Al and O2, we can calculate the number of moles of each:

moles of Al = 10.0 g / 26.98 g/mol = 0.371 mol

moles of O2 = 19.0 g / 32.00 g/mol = 0.594 mol

To determine the limiting reactant, we need to compare the number of moles of each reactant to their stoichiometric coefficients in the balanced equation. The stoichiometric coefficient of Al is 4, while the coefficient of O2 is 3. Therefore, O2 is the limiting reactant because it produces fewer moles of Al2O3 than the amount of Al available.

The moles of Al2O3 produced can be calculated using the mole ratio between O2 and Al2O3 from the balanced equation:

moles of Al2O3 = (0.594 mol O2) x (2 mol Al2O3 / 3 mol O2) = 0.396 mol Al2O3

Finally, we can convert the moles of Al2O3 produced to grams using its molar mass:

mass of Al2O3 = 0.396 mol x 101.96 g/mol = 40.3 g

Therefore, 40.3 grams of aluminum oxide are produced in the reaction.

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

Answer:

1. Oxidation-reduction and hydrolysis

2. Oxidation-reduction

3. Dehydration

Explanation:

Our options for each reaction are:

a) Oxidation‑reduction reaction

b) Esterification reaction

c) Amidation reaction

d) Hydrolysis reaction

c) Hydration reaction

f) Dehydration reaction

In reaction one the have the rupture of the S-CoA bond. This reaction takes place by the addition of a water molecule and the oxidation to a carboxylic acid group. So, for reaction 1 we will have an oxidation-reduction and a hydrolysis reaction.

For reaction 2, the functional group change from alcohol to a carboxylic acid. So, we have an oxidation-reduction reaction.

In the last reaction, we have the production of a double bond by the removal of water. With this in mind, we have a dehydration reaction.

See figure 1

I hope it helps

Answer:

A polyatomic ion, also known as a molecular ion, is a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero. They form a stable grouping which carries a charge (positive or negative). The group of atoms as a whole acts as a charged species in forming an ionic compound with an oppositely charged ion.

Answer:

B) They aren't different

Explanation:

1.5 is equal to 1.50.

In the given reaction, the limiting reactant is hydrogen gas. 3 moles of hydrogen gas produces 2 moles of ammonia, thus 9 moles will produce 6 moles of ammonia that is equal to 102 g.

Ammonia is an inorganic gas formed by the combination of nitrogen gas and hydrogen gas. The balanced chemical equation for the reaction is written below:

\(\rm N _{2} + 3 H_{2} \rightarrow 2 NH_{3}\)

As per the given reaction, hydrogen gas is needed more in this reaction, and it is the limiting reactant which determines the product yield. Here, 3 moles of hydrogen gas produces 2 moles of ammonia. Thus, 9 moles of hydrogen gas produces:

(9 × 2) / 3 = 6 moles.

Molar mass of ammonia = 17 g/mol

Thus mass of 6 moles = 17 g/mol × 6 moles = 102 g.

Therefore, the largest amount of ammonia that can be produced from 9 moles of hydrogen gas is 102 g.

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Answer:

It is dangerous because it can be harder to drive the car.

Explanation:

Any alterations in your car can void some of your warranties and may also pose some safety concerns. It is also illegal as well.

The following are categorized into polar or nonpolar molecules:

a) Beryllium chloride (BeCl₂) is a nonpolar molecule. The Be-Cl bond is polar due to the electronegativity difference between beryllium and chlorine, but the molecule is linear with the two polar bonds pointing in opposite directions, resulting in a net dipole moment of zero.

b) Hydrogen sulphide (H₂S) is a polar molecule. The H-S bond is polar due to the electronegativity difference between hydrogen and sulfur, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

c) Sulphur trioxide (SO₃) is a nonpolar molecule. The S-O bonds are polar due to the electronegativity difference between sulfur and oxygen, but the molecule is trigonal planar with the three polar bonds pointing in different directions, resulting in a net dipole moment of zero.

d) Water (H₂O) is a polar molecule. The H-O bond is polar due to the electronegativity difference between hydrogen and oxygen, and the molecule has a bent shape, resulting in a net dipole moment that is not zero.

e) Trichloromethane (CHCl₃) is a polar molecule. The C-Cl bonds are polar due to the electronegativity difference between carbon and chlorine, and the molecule has a tetrahedral shape, resulting in a net dipole moment that is not zero.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Based on the information provided, we have a reaction between hydrogen iodide (HI) gas and hydrogen gas (H₂) to form iodine gas (I₂). The equilibrium is represented by the equation:

2HI(g) = H₂(g) + I₂(g)

The concentration values given in the table correspond to the concentrations of H₂ and HI at different times.

a) From t=0 s to t=5 s: Without the specific graph mentioned in Figure 7.10, it is difficult to provide a precise explanation of the physical situation in the container during this time period. However, based on the equilibrium reaction given, we can make some general observations. At the start (t=0 s), the concentrations of H₂ and HI may be high. As time progresses, the reaction proceeds, and the concentrations of H₂ and HI may decrease while the concentration of I₂ increases. The specific behavior will depend on the rate of the forward and reverse reactions.

b) External factor altered at t=5 s: To bring about a change in the shape of the graph at t=5 s, some external factor must have been altered. The most likely factor is the total pressure within the container. Since the reaction involves gases, changes in pressure can affect the equilibrium position. However, according to the information given, a change in pressure will not affect equilibrium in this case since the number of moles of gas is the same on both sides of the equation. Therefore, if the shape of the graph changes at t=5 s, some other external factor, such as temperature or the addition of a catalyst, must have been altered.

c) Calculation of K at t=3 s: The equilibrium constant (K) can be calculated at any given time using the concentrations of the reactants and products. However, the concentrations of H₂ and HI at t=3 s are not provided in the information given. Without the necessary data, it is not possible to calculate K at t=3 s.

Lastly, the statement "1 dm³ COCI, decomposes" seems incomplete. If you provide additional information or clarify the question, I'll be happy to assist you further.

The parts of the atom is as follows:

A.) Electrons

ElectronsB.) Neurons

ElectronsB.) NeuronsC.) Protons

An atom is defined as the indivisible part of an element that cannot further be broken down into smaller particles through a chemical process.

The various parts of an atom include the following:

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Answer:

A. electron

B. neutron

C. proton

Explanation:

The given reaction can be balanced and it is clear that, 2 moles of aluminum chloride gives 3 moles of chlorine gas. Then, 35.4 g or 3.7 moles will give 5.65 moles of Cl₂.

A balanced chemical equation represents the perfect stoichiometry for all the reactants and products.  The balanced chemical equation of the given reaction can be written as follows:

\(\rm 2AlCl_{3} + 3F_{2} \rightarrow 2AlF_{3} + 3Cl_{2}\)

Molar mass of AlCl₃ = 133.5 g/mol.

no.of moles in 35.4 g = 35.4 /133.5 = 3.77 moles.

2 moles gives 3 moles of chlorine gas. Then, number of moles of oxygen gas produced by 3.77 moles is:

(3.77 ×3 )/2 = 5.65 moles.

Molar mass of CCl₄ = 154 g/mol.

molecular mass of Cl₂ = 71 g/mol

mass of 4 moles = 284 g.

Mass of CCl₄ produced from 52.5 g of Cl₂

= (52.5 × 154)/284 = 28.6 g

The third reaction can be balanced as follows:

\(\rm 2 KClO_{3} \rightarrow 2 KCl + 3O_{2}\)

Molar mass of potassium chlorate = 122.5 g/mol

no.of moles in 22.8 g = 22.8/122.5 = 0.186 moles.

As per the reaction, 2 moles of potassium chlorate gives 3 moles of oxygen gas, then 0.186 moles gives:

(0.186 × 3)/2 = 0.27 moles.

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Answer:

Mohammed has less kinetic energy

Explanation:

m=Kg

V= m/s

KE= kinetic energy = J

the way you work out the answer is:

KE = 1/2 × m × v squared

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.

Answer:

The symbol of each element is, Ne, Na, Mg, and Al.

Explanation:

Below is the list of elements that has an atomic mass of less than 19.3 u.

The atomic mass of Neon is 20.1797 u and the atomic number is 10.

The atomic mass of Sodium is 22.989769 u and the atomic number is 11.

The atomic mass of Magnesium is 24.305 u and the atomic number is 12.

The atomic mass of Aluminium is 26.981539 u and the atomic number is 13.

Here, the symbol of each element is, Ne, Na, Mg, and Al.

Answer:

c

Explanation:

mass is like matter it cant be created or destroyed so mass stays the same.

Answer:

C) It is equal to the total mass of the products.

Explanation:

The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.

- profparis

Answer:

I think the awnser is B proteins

Explanation:

I could be wrong but this is off preveous knowleadge.