5.
Why do you think hydrogen (element 1) is on both sides of the periodic table? (2 marks)
Name a metal that is in the liquid state at room temperature. (1 mark)
8. Explain the difference between an atom and an ion. (2 marks)
9.
6789
6.
Will astatine (element 85) look more like
marks)
7.
Use your periodic table, pick out which atom with the highest ionization energy in these lists: (1
mark each = 4 marks)
a) Na, Sr, Be, Rb
b) B. Al, C, Si
c)
Fr, Fe, Zn, Cl
d) Cu, Ag, Au, B
10. Why is second ionization energy of atom always larger than its first ionization energy? (1 mark)
11. Which of the atoms in each of the following groups has the largest atomic radius? (1 mark each
= 3 marks)
a) Cl, Si, K
b) Cs, Ca, Be
c) N, Al, Cl
12. Arrange these groups of atoms in order of increasing atomic radius: (1 mark each = 3 marks)
a) Xe, Ar, Kr
b) K, Br, Ca
c) B, C, N
13. Explain two reasons why atomic radii increase from top to the bottom. (2 marks)
14. Explain a reason why atomic radii decrease from the left to right. (1 mark)
15. Which atom in each of the following pairs has the highest electronegativity? (1 mark each
= 3 marks)
a) Zn or Ge
b) O or Te
c) Ba or Hg
16. Which atom in each of the pairs that follow has the higher electron affinity and therefore gives off
the most energy when it forms a negative ion? (1 mark each = 3 marks)
c) Si, Ga
a) Cl, Br
b) Se, Br

Answer:

The Speed squared is equal to the Kinetic Energy

Explanation:

1^{2}  = 1

2^{2} = 4

3^{2} = 9

4^{2} = 16

Therefore the data on the table proves that the Speed squared is equal to the Kinetic Energy

Explanation:

Chemical hazards: Handling toxic substances can cause irritation and carcinogenicity.

Biological hazards: Biological hazards include hazards from working with small animals, working with bloodborne pathogens and working with biological agents, such as viruses and bacteria.

Physical hazards: Physical hazards include exposure to noise, poor posture and the explosibility and flammability of substances.

Safety hazards: Safety hazards include unbalanced centrifuges, danger when handling hot sterilized items and electrical hazards, such as shock, explosions, blasts and electrocutions.

Allergy hazards: A common allergy hazard in the laboratory setting is a latex allergy, as many of the materials used in a laboratory setting are latex.

Dangers in the laboratory setting can also come from unsafe practices, including:

Working alone in the laboratory

Neglecting to wear a lab coat

Lack of safety training

Answer:

Percentage of Oxygen in Ca(NO3)2•2H2O

Ankit Mishra

Calculate the Percentage of 1) Oxygen in Calcium nitrate dihydrate.

Calcium nitrate dihydrate, also known as calcium nitrate (II) hydrate, has the chemical formula Ca(NO3)2•2H2O. The percentage of oxygen in calcium nitrate dihydrate can be calculated by determining the number of oxygen atoms in the formula and dividing that by the total number of atoms in the formula, then multiplying by 100 to express the answer as a percentage.

Here's the calculation:

1 calcium atom (Ca) = 40.08 g/mol

2 nitrogen atoms (N) = 14.01 g/mol

10 oxygen atoms (O) = 16.00 g/mol

So, the molar mass of Ca(NO3)2•2H2O is (40.08 + 2 x 14.01 + 10 x 16.00) g/mol = 158.08 g/mol.

The percentage of oxygen in calcium nitrate dihydrate can then be calculated as follows:

(10 x 16.00 g/mol) / 158.08 g/mol x 100% = 63.18%

So, the percentage of oxygen in calcium nitrate dihydrate is approximately 63.18%.

Answer:

0.09536 g of SO2 in the sample of air

Explanation:

The first step is to convert the volume of KMnO4 solution to moles. This can be done using the formula:

moles = Molarity x volume (in liters)

So,

moles = 0.008 M x (7.37 mL) x (1 L/1000 mL)

= 0.0000596 moles

Next, we need to find the ratio of moles of SO2 to moles of KMnO4 in the balanced equation:

5SO2 + 2MnO4- + 2H205SO42- + 2Mn2+ + 4H+

From the equation, it can be seen that 2 moles of KMnO4- react with 5 moles of SO2. So,

moles of SO2 = (moles of KMnO4) x (5 moles of SO2 / 2 moles of KMnO4)

= 0.0000596 x (5/2)

= 0.0001495 moles

Finally, to convert moles of SO2 to grams, we can use the formula:

grams = moles x molar mass

Since the molar mass of SO2 is 64 g/mol,

grams = 0.0001495 x 64

= 0.09536 g

So, there are 0.09536 g of SO2 in the sample of air.

Answer:

293 ms

Explanation:

The half-life of a first-order reaction can be calculated using the following formula:

t1/2 = 0.693 / k

Where t1/2 is the half-life and k is the rate constant.

For this reaction, the rate constant is 2.35 x 10^2 L/mol/s, so:

t1/2 = 0.693 / (2.35 x 10^2 L/mol/s) = 0.293 / (2.35 x 10^2) s = 0.000293 s = 293 ms

Answer:

0.293 / 2.35 × 10^2 seconds.

Explanation:

The half-life of a first order reaction can be calculated using the equation:

t1/2 = 0.693 / k

where t1/2 is the half-life, k is the rate constant, and 0.693 is the natural logarithm of 2.

Substituting the values given in the question:

t1/2 = 0.693 / 2.35 × 10^2 L mol-1 s-1 = 0.293 / 2.35 × 10^2 s

So, the half-life of the species is approximately 0.293 / 2.35 × 10^2 seconds.

you gonna get magnesium bromide MgBr2

Magnesium is metal and bromine is non-metal, and the combination of the two produces an ionic compound called magnesium bromide

Used as a catalyst.

Used for position-specific analysis of Triglycerols.

Widely used as an anticonvulsant for the treatment of neuropathy.

It is used as a mild sedative.

Consider 1.00 mole of hydrogen gas, H₂. The number of molecules in  H₂ is12.044 × 10²³  molecules. The number of hydrogen atoms is 12.044 × 10²³  molecules and the mass of the sample is 2 g.

The moles of the hydrogen = 1 mol

The one mole of the substance = 6.022 × 10²³ atoms / molecules

The number of the hydrogen atoms in H₂ = 2 × 6.022 × 10²³ atoms

The number of the hydrogen atoms in H₂ = 12.044 × 10²³  atoms

The number of the hydrogen molecules in H₂ = 12.044 × 10²³  molecules

The molar mass of the  H₂ = 2 g/mol

The moles of the  H₂  = mass / molar mass

The mass of the  H₂  = moles × molar mass

The mass of the  H₂  = 1 ×2

The mass of the  H₂  = 2 g

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The coefficients that correctly balance the given equation is 1. 6, 3,2

The correct option is C

A balanced equation of a reaction is an equation in which the moles of atoms of elements of the reactants are equal to the moles of atoms of the product.

According to the law of conservation of matter, matter is neither created nor destroyed, hence, the mass of the reactants must be equal to the mass of products at the end of any given chemical reaction.

The balanced equation of the given reaction is as follows:

Ba₃N₂+ 6 HOH - -> 3 Ba(OH)₂ + 2 NH₃

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With respect to the reaction shown, the type of compound that will form is a hemiketal, and the name of the reaction is "hemiketal formation.

A hemiketal is created when an alcohol reacts with a ketone, whereas a hemiacetal is created when an alcohol reacts with an aldehyde.

Organic substances called hemiacetal and hemiketal are hybrid molecules that have an ether group and a hydroxyl group in the same molecule.

The name of reaction that forms hemiketals and hemiacetals is called "hemiacetal formation" or "hemiketal formation," depending on the specific functional group involved.

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Sophie is pushing her bike up a hill with 10N if she increases her force to 12N, then there will be decrease the bike's mass. Therefore, the correct option is option C.

A force is indeed an effect in physics that may modify the velocity of an item. A force can cause a mass object to change its velocity (e.g., moving from rest), i.e., to accelerate.

Intuitively, force may be characterized as a push or even a pull. A force is a vector quantity since it has both direction and magnitude. It really is measured in newtons, the SI unit of mass (N). Sophie is pushing her bike up a hill with 10N if she increases her force to 12N, then there will be decrease the bike's mass.

Therefore, the correct option is option C.

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The molecule D shows an isomer of the molecule given below. Therefore, option D is correct.

The term Isomer is defined as the compounds that contain exactly the same number of atoms, i.e., they have exactly the same empirical formula, but differ from each other by the way in which the atoms are arranged.

Isomerism is the phenomenon in which more than one compounds have the same chemical formula, but they have different chemical structures.

Therefore, given molecule and D molecule are isomers of each other because they have the same number of atoms, but they differ in arrangement of the atoms.

Thus, option D is correct.

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According to Lechatliers principle, as the concentration  of HCl is decreasing, the reaction will shift to the reactant side to increase HCl, then the Keq decreases, since product concentration is decreases.

According to Lechatliers principle, when an any disorder imbalance the equilibrium of a reaction system, the system itself balances the factors and shifts to a new equilibrium.

If the concentration of any component is increased, then the reaction shifts to the direction in which it is consumed. If the concentration is decreased, the reaction shifts to the direction in which the component is produced.

Hence, as the HCl decreases, the reaction shifts to backwards direction to produce more HCl, then, concentration of reactants HCl and Mg increases, and that products and Keq decreases.

The reaction is an exothermic reaction. Hence, as the temperature is increased, the reaction shifts to the backward direction in which heat is used. Hence, reactant concentration increases, product concentration decreases, Keq also decreases.

If the temperature is reduced, the reaction shift to the forward direction. Hence, concentration of HCl, and Mg decreases but MgCl2 increases and Keq increases.

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If commercial vinegar contains around 5 g of acetic acid (ch 3cooh) per 100 ml (1 l = 1000 ml) in solution, its molarity is 0.83 M.

Molarity is the amount of solute in moles per litre of solution.

Acetic acid's mass is reported as 5.0 g, and the solution's volume is 100.0 mL.

We divide the grammes of acetic acid by the molar mass in order to convert them from grammes to moles.

Acetic acid's chemical formula is CH₃COOH. Molar mass of acetic acid is equal to 2(12.01), 4(1.01), 2(16), 24.02, 4.04, and 32 grammes per mol. Acetic acid has a molecular weight of 5.0/60.06, or 0.083 moles.

Transform mL to L.

1 L equals 1000 mL, as we are aware.

The solution's molarity is equal to 0.083moles per 0.1000L, or 0.83M, thus we divide by 1000 to convert from mL to L. 100/1000 = 0.1000 L

Therefore, 0.83 M of acetic acid is present in vinegar.

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Answer:

50 moles of oxygen

Explanation:

The reaction between octane (C8H18) and oxygen (O2) can be represented by the following equation:

C8H18 + 12.5O2 -> 8CO2 + 9H2O

So, to react fully with 4 mol of octane, we need 4 mol * 12.5 mol O2/1 mol C8H18 = 50 moles of oxygen.


ALLEN

Answer: answer of the question is given below

Explanation:

Answer:

0.556 °C.

Explanation:

The freezing point depression of a solution can be calculated using the equation:

ΔTf = Kf x molality

Where ΔTf is the change in freezing point, Kf is the molal freezing point depression constant, and molality is the concentration of solute in mol/kg.

For magnesium chloride, Kf = 1.853 °C/molal. The molality of the solution can be calculated as follows:

molality = moles of solute / mass of solvent (in kilograms)

= 0.300 mol / (0.300 mol x 1000 g/mol) = 0.300 g/1000 g = 0.0003 kg/kg = 0.300 mol/kg

Now, substituting the values into the equation:

ΔTf = Kf x molality

= 1.853 °C/molal x 0.300 mol/kg

= 0.556 °C

So the freezing point of the 0.300 molal aqueous solution of magnesium chloride will be lower than the freezing point of pure water by 0.556 °C.



ALLEN

Answer:

0.101 M

0.1 mol/kg

0.644

Explanation:

To calculate the molarity, molality, and mole fraction of Na2SO4 in a solution, you need to know the moles of Na2SO4 in the solution and the volume or mass of the solution.

A) Molarity: Molarity (M) is defined as the number of moles of solute per liter of solution. To calculate molarity, we need to divide the number of moles of Na2SO4 by the volume of the solution in liters.

First, calculate the number of moles of Na2SO4:

mass of Na2SO4 = 755 g

molecular weight of Na2SO4 = 142 g/mol

number of moles = mass/molecular weight = 755 g / 142 g/mol = 5.34 moles

Next, calculate the volume of the solution:

mass of water = 53,100 g

density of water = 1 g/mL

volume of water = mass/density = 53,100 g / 1 g/mL = 53,100 mL = 53.1 L

Finally, calculate the molarity:

molarity = number of moles / volume of solution = 5.34 moles / 53.1 L = 0.101 M

B) Molality: Molality (m) is defined as the number of moles of solute per kilogram of solvent. To calculate molality, we need to divide the number of moles of Na2SO4 by the mass of the solvent in kilograms.

mass of water = 53,100 g

mass of solvent in kilograms = mass in grams / 1000 g/kg = 53,100 g / 1000 g/kg = 53.1 kg

Finally, calculate the molality:

molality = number of moles / mass of solvent = 5.34 moles / 53.1 kg = 0.1 mol/kg

C) Mole fraction: The mole fraction (X) is defined as the ratio of the number of moles of solute to the total number of moles of solute and solvent in a solution. To calculate the mole fraction of Na2SO4, we need to divide the number of moles of Na2SO4 by the total number of moles of Na2SO4 and water.

number of moles of Na2SO4 = 5.34 moles

number of moles of water = 53.1 kg * 1000 g/kg / 18.015 g/mol = 2.96 moles

total number of moles = number of moles of Na2SO4 + number of moles of water = 5.34 moles + 2.96 moles = 8.30 moles

Finally, calculate the mole fraction:

mole fraction of Na2SO4 = number of moles of Na2SO4 / total number of moles = 5.34 moles / 8.30 moles = 0.644

The molarity of Na2SO4 in the solution is 0.101 M, the molality is 0.1 mol/kg, and the mole fraction of Na2SO4 is 0.644.

Answer:

C4H8O4

Explanation:

The empirical formula of a compound can be determined from its elemental composition. To determine the empirical formula, we first need to convert the mass of each element to moles, and then divide by the smallest number of moles of any element to obtain the mole ratio.

From the combustion analysis, the number of moles of CO₂ produced is 11.88 g / 44.01 g/mol = 0.2694 mol. The number of moles of H₂O produced is 3.891 g / 18.015 g/mol = 0.2169 mol.

Next, we convert the carbon and hydrogen present in the compound to moles by dividing the mass of each element by its atomic mass:

C = (7.132 g - 11.88 g - 3.891 g) / 12.01 g/mol = 0.2694 mol

H = 2 * 0.2169 mol = 0.4338 mol

Now, we divide each number of moles by the smallest number of moles (0.2694 mol) to obtain the mole ratio:

C = 0.2694 mol / 0.2694 mol = 1

H = 0.4338 mol / 0.2694 mol = 1.6

O = 0.2694 mol / 0.2694 mol = 1

The empirical formula of the compound is therefore C1H1.6O1, which can be simplified to C1H2O.

To determine the molecular formula, we use the molar mass of the compound, 132.1 g/mol, and compare it to the molar mass calculated from the empirical formula. The molar mass of C1H2O is 12.01 g/mol + 2 * 1.01 g/mol + 16.00 g/mol = 30.03 g/mol. To find the molecular formula, we divide the molar mass of the compound by the molar mass of the empirical formula and multiply each element in the empirical formula by this number:

132.1 g/mol / 30.03 g/mol = 4.40

C = 1 * 4.40 = 4.40

H = 2 * 4.40 = 8.80

O = 1 * 4.40 = 4.40

The molecular formula of the compound is therefore C4H8O4.

Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ

Answer:

11 * CH₂ = C₁₁H₂₂

Explanation:

The empirical formula of a compound can be determined by finding the ratio of the number of atoms of each element present in the compound. To find the empirical formula of this organic compound, we need to calculate the number of moles of each element present in the sample.

First, we find the number of moles of carbon by dividing the mass of CO₂ produced by the molar mass of CO₂:

11.88 g CO₂ / 44.01 g/mol CO₂ = 0.269 mol C

Next, we find the number of moles of hydrogen by dividing the mass of H₂O produced by the molar mass of H₂O:

3.891 g H₂O / 18.02 g/mol H₂O = 0.216 mol H

To find the empirical formula, we divide the number of moles of each element by the smallest number of moles calculated:

0.269 mol C / 0.216 mol H = 1.244

0.216 mol H / 0.216 mol H = 1

So the empirical formula of the organic compound is CH₂.

The molecular formula of a compound is a multiple of its empirical formula, with the multiple determined by the molar mass. To find the molecular formula of this organic compound, we divide the molar mass of the sample by the molar mass of the empirical formula:

132.1 g/mol / (12.01 g/mol + 2 * 1.01 g/mol) = 11

So the molecular formula of the organic compound is 11 * CH₂ = C₁₁H₂₂.



ALLEN

Answer: 23

Explanation:

because it is been multiplyed by 3 has s 31 nucleons and has atomic numbe equal to 15. The number of electron having m = 0 i

Answer:

The number of electrons with magnetic quantum number m = 0 can be calculated from the atomic number of the element. The atomic number gives the number of protons, and thus the number of electrons in a neutral atom. For the anion X-3, we have 15 - 3 = 12 electrons. The magnetic quantum number m can have integer values from -j to +j, where j is a half-integer representing the total angular momentum quantum number of the electron. In this case, j can be equal to 1/2, 3/2, 5/2, and so on. For the lowest value of j, which is 1/2, the magnetic quantum number m can have two values, +1/2 and -1/2. Thus, there are two electrons with m = 0. The number of electrons with m = 0 is equal to the number of electrons in the lowest energy level, which is the 1s orbital. In this case, two electrons occupy the 1s orbital, and both have m = 0.

Explanation:

The given equations are of the following type:

1. 2 Na + Cl2 = 2NaCl : Combination reaction

2. FeCl2 = Fe + Cl2 : Decomposition reaction

3. C2H4 + 3 O2 = 2CO2 + 2H2O : Combustion reaction

4. F2 + 2 NaBr = 2NaF + Br2 : Single displacement reaction

Combination reaction: Reaction in which two or more elements or compounds join to form a single compound is called a combination reaction.

Decomposition reaction : Reaction in which one reactant breaks own into two or more products is called a decomposition reaction.

Combustion reaction :  Reaction in which a compound and an oxidant is reacted to produce a new product along with heat and light is called a combustion reaction.

Single displacement reaction : Reaction in which one element is replaced by another in a compound during the reaction is called a single displacement reaction

Double displacement reaction: Reaction in which two reactants exchange ions to form two new compounds double displacement reaction.

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The units which are used to represent the volume are mL, L, cm³, m³, etc. The volume of air in liters that you might inhale (and exhale) in 24.0 hours is 10,684.8 L.

The measure of the capacity that an object holds is generally defined as the volume. For example if a beaker can hold 100 mL of water, then its volume is said to be 100mL.

Here in minute, volume is:

15 × 0.495 = 7.42 L

In an hour, volume is:

7.42 × 60 = 445.2

In 24 hours, the volume will be:

Volume = 445.2 × 24 = 10,684.8 L

Thus the volume of air in 24 hours is 10,684.8 L.

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According to the question the molar mass of C2H5OH is 46.07 g/mol.

Molar mass is the mass of a given substance (expressed in grams) divided by the amount of substance (expressed in moles). It is also known as the molecular weight of a substance, and is the sum of the atomic masses of all the atoms in a molecule. Molar mass is used to calculate the mass of a compound in a given volume, and is commonly used in the fields of chemistry, physics, and biology to identify, quantify, and measure substances. It is also used to determine the density of a given substance, and is an important part of formulas used to calculate the concentration of a particular substance in solution.

To calculate the number of molecules, we must divide the given mass of 11.5 g by the molar mass of C2H5OH. This gives us a result of 250.03 molecules of C2H5OH.

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The formula of the neutral compound is CaO and the name of the compound is Calcium Oxide.

A compound is a substance formed when two or more elements chemically combine in fixed proportions. Compounds can be either molecules or ionic, and have unique physical and chemical properties. Molecule compounds are composed of atoms covalently bonded, meaning the atoms share electrons. Ionic compounds are composed of ions with a positive or negative charge; these ions are attracted to each other in a crystalline lattice structure. Compounds can be broken down into their separate elements by chemical means, such as electrolysis.

This compound is formed when one Calcium cation (Ca^2+) bonds with one Oxygen anion (O^2-). The two ions have opposite charges, so they attract and form a neutral compound with a charge of 0.

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The expected dehydration product of 1 equiv. of a primary alcohol using H2SO4 as the dehydrating agent is an alkene. Here's the reaction and the product: CH3CH2CH2CH2OH + H2SO4 → CH3CH2CH=CH2 + H2O

The product is 1-butene.

In the E2 reaction, a proton is taken away from the carbon next to the alcohol, creating a double bond and releasing a water molecule in the process.

Organic molecules called primary alcohols have an alcohol functional group with a carbon atom that is free of any alkyl substituents. The typical formula for primary alcohols is CnH2n+1OH, where n is the number of carbon atoms in the molecule. Ethanol, methanol, propanol, and butanol are examples of main alcohols.

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Note: The correct option would be as bellow,

Primary alcohols can also dehydrate to alkenes. Unlike secondary and tertiary alcohols, the dehydration reaction occurs under an E2 elimination instead of an El mechanism, due to the instability of the primary carbocation that would be formed. Consider the reaction: CH3CH2CH2CH OH H2SO4 product Draw the expected dehydration product of 1 equiv. of a primary alcohol. Select Draw Rings More Erase C H

46.2648

Atomic mass describes the number of protons and neutrons in an atom.

Percent Abundance

Percent abundance is the percentage of atoms within a sample that have a specific mass number. The reason that different atoms within a sample would have different mass numbers is that they are different isotopes. For example, if the isotope Cl-35 has a percent abundance of 75%, then 75% of all Chlorine atoms within a sample will have a mass number of 35. Percent abundance refers to the likelihood of an isotope occurring in a natural sample. Percent abundance does not take into account artificial samples of elements.

Finding Atomic Mass

The atomic mass of an element is found through the mass of isotopes and their percent abundances. The formula for atomic mass is:

In this formula, the m is the mass of the isotope and p is the percent abundance. The percent abundance should be expressed as a decimal for all calculations. Now, plug in the values and solve.

Rounded to 4 decimal places, this equals 46.2648. This means that the atomic mass of element "X" is 46.2648 amu.

the empirical formula of the compound  that contains 1. 04 g k, 0. 70 g cr, and 0. 86 g o. is K0.5Cr1O2.

The empirical formula of a compound is the simplest whole-number ratio of atoms of each element in the compound. To find the empirical formula of a compound, you need to determine the number of moles of each element present in the sample.

First, you need to convert the masses of each element to moles:

For potassium (K), 1.04 g / 39.10 g/mol = 0.0264 moles

For chromium (Cr), 0.70 g / 51.99 g/mol = 0.0134 moles

For oxygen (O), 0.86 g / 16.00 g/mol = 0.0538 moles

Next, divide each number of moles by the smallest number of moles to get the simplest whole-number ratio:For potassium (K), 0.0264 moles / 0.0264 moles = 1

For chromium (Cr), 0.0134 moles / 0.0264 moles = 0.5

For oxygen (O), 0.0538 moles / 0.0264 moles = 2.0

Therefore, the empirical formula of the compound is K0.5Cr1O2. This represents the simplest whole-number ratio of atoms of each element in the compound.

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The given starting material is not visible, but if it has an -OH functional group attached to a methyl group (-OCH3), then the reaction with concentrated HBr will lead to the following products:

The -OH group will be replaced by a Br atom, forming methyl bromide (CH3Br).

Water (H2O) will also be produced as a byproduct of the reaction.

So, the organic products of the reaction are:

O-CH3 + HBr → CH3Br + H2O

In organic chemistry, a methyl group is an alkyl produced from methane that has the chemical formula CH3, one carbon atom bound to three hydrogen atoms. The group's name is frequently shortened to Me in formulas. In numerous organic molecules, this hydrocarbon group can be found. In most compounds, the group is extremely stable.

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Answer:

The balanced chemical equation for this reaction is:

2 Cu + Ag(NO3)2 -> 2 Cu(NO3)2 + Ag

The limiting reactant is the reactant that runs out first and determines the amount of product that can be produced. To determine the limiting reactant, we need to calculate the number of moles of each reactant.

From the given mass of copper, we can calculate the number of moles as follows:

2.5 g Cu / 63.55 g/mol = 0.0395 mol Cu

From the given mass of silver nitrate, we can calculate the number of moles as follows:

5 g AgNO3 / 169.87 g/mol = 0.0295 mol AgNO3

Since 0.0295 mol of AgNO3 is less than 0.0395 mol of Cu, AgNO3 is the limiting reactant.

To calculate the amount of each product produced, we can use the stoichiometry of the balanced equation.

For Ag, the reaction produces 1 mole of Ag for every 2 moles of AgNO3, so we have:

0.0295 mol AgNO3 * 1 mole Ag / 2 moles AgNO3 = 0.0148 mol Ag

And converting moles to grams:

0.0148 mol Ag * 107.87 g/mol = 1.59 g Ag

For Cu(NO3)2, the reaction produces 2 moles of Cu(NO3)2 for every 2 moles of AgNO3, so we have:

0.0295 mol AgNO3 * 2 moles Cu(NO3)2 / 2 moles AgNO3 = 0.0295 mol Cu(NO3)2

And converting moles to grams:

0.0295 mol Cu(NO3)2 * 164.46 g/mol = 4.86 g Cu(NO3)2

Therefore, the limiting reactant is AgNO3 (Cu/AgNO3) and the reaction produces 1.59 g of Ag and 4.86 g of Cu(NO3)2.

2Kg is the mass of the object. Therefore, the correct option is option B among all the given options.

Acceleration is the rate at which velocity varies over time, both in terms of speed and direction. A point or object travelling in a straight path called accelerated if it accelerates or decelerates.

Regardless of whether the speed remains constant, movement on a circle becomes accelerated because of direction is always changing. Both redistribution to acceleration in all other types of motion.

F (N)    Acceleration (m/s/s)

0            0

4            2

8            4

12          6

for the set 4,

F =ma

m = F/a

4/2=2

8/4= 2

12/6= 2Kg

Therefore, the correct option is option B.

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Your question is incomplete but most probably your full question was,

This table shows the relationship between the force on an object and the object's resulting acceleration.

F (N)    Acceleration (m/s/s)

0            0

4            2

8            4

12          6

What is mass of the object?

A) 1Kg

B) 2Kg

C) 3Kg

D) 4Kg

Answer:

The coefficient of oxygen in the balanced equation is 2.

Explanation:

To determine when the cells are in an isotonic solution, the additional investigation that can be used is option B. Decreasing the salinity of the environment a little at a time until ATP usage reaches a minimum.

An isotonic solution is one where the solute concentration outside the cell is the same as the solute concentration inside the cell. In this state, there is no net movement of water into or out of the cell, and the contractile vacuole does not need to pump out excess water. As the salinity of the environment is decreased, the solute concentration outside the cell will decrease, and water will enter the cell, leading to an increase in the workload of the contractile vacuole. However, when the salinity of the environment is decreased to the point where it becomes isotonic with the cytosol of the cell, the workload of the contractile vacuole will reach a minimum, as there is no more excess water to be pumped out.

Therefore, by decreasing the salinity of the environment a little at a time until the ATP usage reaches a minimum, the experimenter can determine when the cells are in an isotonic solution.

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