If 0.205 moles of AgNO3, react
with 0.155 moles of H2SO4
according to this UNBALANCED
equation below, what is the mass
in grams of Ag2SO4, that could be
formed?
AgNO (aq) + H₂SO (aq) → Ag,SO (s) + HNO, (aq)

The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the \(Ni^{2+}\) ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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Answer:

It detects negative static electricity when protons are drawn down into the

Explanation:

electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.

The volume in cubic centimeters is 25251.17cm³

Volume measures capacity. So the unit of volume is basically a unit for measuring the capacity or the extent of an object or space. The unit is mostly used to specify the volume of goods or a liquid (fluids).

In this problem, volume of the box is given by the formula:

V = l x w x h

Solving the problem

First, let us convert every dimension to centimeter.

l = 8.54 ft x 12 inches x 2.54 cm  = 260.29 cm

w = 0.0455 yd x 3ft  x 12 inch x 2.54 cm  = 4.16052cm

h = 9.18 in x 2.54 cm = 23.3172 cm

Now, we can solve for the volume of the box using the given formula above.

V = l x w x h

Then substitute the given data

V = (260.29 cm) x (4.16052 cm) x (23.3172 cm)

V = 25251.17cm³

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One mole of aluminum oxide or Al₂O₃ is 102 g/mol  . It contains 54 g of Al metal. Thus, 25.5 tones of aluminum oxide contains 13.5 tones of Al. Therefore, the maximum mass of aluminum that can be extracted is 13.5 tones.

Aluminum is 13 the element in periodic table. It is an electropositive element and exhibit metallic properties. Aluminum easily forms its oxides by reacting with atmospheric oxygen.

The molar mass of aluminum oxide Al₂O₃ is 102 g/mol. The atomic mass of Al is 27 g/mol. Thus 102 g of Al₂O₃ contains 54 g of Al. Therefore, the mass of Al in 25.5 tones or 25.5 ×10⁶ g of Al₂O₃ is calculated as follows:

mass of Al = (25.5 ×10⁶ g × 54 g) / 102 g

                  = 13.5  ×10⁶ g = 13.5 tones.

Therefore, the maximum mass of aluminum that can be extracted is 13.5 tones

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Answer:

All of the elements in group 17 all have 7 valence electrons. This is one thing they all share in common.

Explanation:

Answer:

C) Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic elements in the same period

Explanation:

Let us remember that metals are found towards the left hand side of the periodic table while nonmetals are found towards the right hand side of the periodic table.

The magnitude of effective nuclear charge increases from left to right in the periodic table as the size of the nuclear charge increases without a corresponding increase in the number of shells. This implies that as one moves from metals to nonmetals, there is a significant increase in the magnitude of effective nuclear charge which simultaneously leads to an increase in ionization energy across the period.

Therefore, it is a false statement that; 'Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic elements in the same period'.

The statement that can be regarded as false is : C) Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic.

Therefore, Periodic table has its arrangements in periods and group.

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Answer:

Here is the correct order (ascending order):

gene, DNA, chromosome, nucleus, cell, organism.

A gene is a segment of DNA that contains the instructions for building a protein or RNA molecule. DNA is the molecule that carries genetic information and makes up genes. A chromosome is a structure made of DNA and protein that carries genes. A nucleus is a membrane-bound organelle that contains chromosomes. A cell is the smallest structural and functional unit of living organisms, consisting of a nucleus (or nucleoid in prokaryotes) and cytoplasm. An organism is an individual living entity, such as a plant, animal, or bacterium, that consists of multiple cells.

Answer:

she could look at the color, hardness, and luster

Answer:

2060.775 J

Explanation:

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

Specific heat capacity (C) = 0.129 J/g°C

Mass (m) = 355 g

Initial temperature (Tᵢ) = 95 °C

Final temperature (Tբ) = 140 °C

Heat (Q) tranfered =?

We can calculate the amount of heat transferred by using the following formula:

Q = mC(Tբ – Tᵢ)

Q = 355 × 0.129 (140 – 95)

Q = 45.795 × 45

Q = 2060.775 J

Thus, 2060.775 J of energy was transferred.

Explanation:

Hope this helps:)

Based on the calculations, the quantity of heat lost by the object is equal to 2060.775 Joules.

Based on the data recorded in parts A and C, we obtained the following parameters:

Next, we would calculate the quantity of heat lost by using the following formula:

Q = m × c ×(T₂ - T₁)

Q = 355 × 0.129 (140 - 95)

Q = 45.795 × 45

Q = 2060.775 Joules.

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Answer:

Explanation:

sory i dont know

The statement(s) that correctly compare the masses of protons, neutrons, and electrons are options A and F.

Subatomic particles are any of many units of matter smaller than an atom. They are three in number and are as follows;

Protons are positively charged subatomic particles forming part of the nucleus of an atom. Electrons are negatively charged particles while neutrons are neutrally charged i.e. 0.

Based on the above explanation, it can be said that:

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Answer:

Be,Mg,Ca,Sr,Ba.Ra[down the group electronegativity is decreasing]

Explanation:

The following elements in order of decreasing electronegativity are:

Beryllium > Magnesium > Calcium > Strontium > Barium > Radium.

Electronegativities decrease from top to bottom within a group of elements. The order of decreasing electronegativities F > Cl > Br > I is another sequence that we will use to interpret the chemical and physical properties of organic compounds.

In the periodic table, atomic radii decrease from left to right across a row and increase from top to bottom down a column. Because of these two trends, the largest atoms are found in the lower-left corner of the periodic table, and the smallest are found in the upper right corner.

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The order of reaction is defined as the power to which the concentration of the reactants are raised in the rate equation of the reaction.

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The chemical equation for the decomposition of water is:

\(2 H_2O -- > 2 H_2 + O_2\)

To balance this equation, we need to count the number of atoms of each element on both sides of the equation.

On the left side of the equation, we have:

2 hydrogen atoms (2 H₂O)

2 oxygen atoms (2 H₂O)

On the right side of the equation, we have:

2 hydrogen atoms (2 H₂)

2 oxygen atoms (1 O₂)

We can see that the number of hydrogen atoms is already balanced, but the number of oxygen atoms is not. To balance the equation, we need to add a coefficient in front of O2 so that we have the same number of oxygen atoms on both sides.

The balanced equation is:

\(2 H_2O -- > 2 H_2 + 1 O_2\)

A compound is broken down into simpler compounds during a decomposition reaction. Different techniques, such as heating, exposure to light, or the inclusion of a catalyst, can be used to produce this reaction.

The reactant component splits into two or more products, which may be elements or compounds, during decomposition. A synthesis reaction, in which less complex substances join to create a more complex compound, is the antithesis of this reaction.

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Answer:

Following are the solution to this question:

Explanation:

Following are the lewis structure of the \(NH_2^{-}\):

In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. So, the graph for the given element is defined in the attached file.

The Lewis structure for the amide anion can be shown as in the given figure.

Lewis structures, also known as Lewis dot formulas, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.

In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. The Lewis structure for the amide anion can be shown

Hence, this is the required answer.

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Adding sulfuric acid to water will decrease the pH dramatically.option 4.

Sulfuric acid is a strong acid and is a type of acid rain. When five drops of sulfuric acid are added to a sample of water, the pH of water will decrease dramatically. This is because sulfuric acid is a strong acid that is capable of dissociating completely in water, producing a high concentration of hydrogen ions (H+) and sulfate ions (SO4²-). This increase in hydrogen ion concentration lowers the pH of water and makes it more acidic.Acid rain is a type of rain that has a pH lower than 5.6, which is the normal pH of rainwater. The acidity of acid rain is caused by the presence of strong acids like sulfuric acid and nitric acid. These acids are produced when sulfur dioxide (SO2) and nitrogen oxides (NOx) are emitted into the atmosphere by human activities like burning fossil fuels and industrial processes.When these gases react with water, they form sulfuric acid and nitric acid, respectively, which then fall to the ground as acid rain.

Acid rain can have harmful effects on the environment, including the acidification of lakes and rivers, the degradation of forests and soils, and the corrosion of buildings and monuments.To conclude, when five drops of sulfuric acid are added to a sample of water, the pH of water will decrease dramatically.option 4.

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Answer:

40,113 years

Explanation:

To find the age of the sample, you need to use the half-life formula:

\(N(t)=N_0(\frac{1}{2})^{t/h\)

In this formula:

------> N(t) = current mass (g)

------> N₀ = initial mass (g)

------> t = time passed (yrs)

------> h = half-life (yrs)

You can plug the given values into the equation and rearrange the formula to find "t".

N(t) = 0.781 g                       t = ? yrs

N₀ = 100 g                           h = 5730 yrs

\(N(t)=N_0(\frac{1}{2})^{t/h\)                                           <----- Half-life formula

\(0.781=100(\frac{1}{2})^{t/5730}\)                                     <----- Insert values

\(0.00781=(\frac{1}{2})^{t/5730}\)                                       <----- Divide both sides by 100

\(log_{1/2}(0.00781)=log_{1/2}((\frac{1}{2})^ {t/5730})\)               <----- Take \(log_{1/2}\) of both sides

\(7.00 = \frac{t}{5730}\)                                                   <----- Solve \(log_{1/2}\)

\(40,113 = t\)                                                   <----- Multiply both sides by 5730

The given sample is 40,113 years .

Half-life, in radioactivity, is the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay.

Half-life formula,

\(\rm N(t)\;=N_0(\dfrac{1}{2})^\frac{t}{t1/2}\)   .......(1)

where,

N(t)=current mass

N₀=initial mass

t=time period

h=half -life

Given,

N(t)=0.781g, t=? yrs, N₀=100g, h=5730 years

\(\rm N(t)\;=N_0(\dfrac{1}{2})^\frac{t}{t1/2}\)

put the values, in ......(1)

0.781=100(1/2) \(t/5730\\\)

log₁/₂(0.00781)=log₁/₂ ( 1/2)\(t/5730\)

7=t/5730

40,113=t

Hence, the given sample is 40,113 years .

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Answer:

easeaseaseas

Explanation:

The number of moles of the gas can be determined using ideal gas equation. The number of moles of Br gas in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

Ideal gas law states the relation between temperature, pressure and volume with the number of moles of a gas as written below:

PV = nRT

where, R is the universal gas constant equal to 0.082 L atm/K mol

Given that, T = 327 K

P = 1.38 atm

V = 2.8 L.

Then, n = PV/RT

Number of moles of Br gas, n = (1.38 atm ×2.8 L)/(327 K × 0.082 L atm/K mol ) = 0.144 moles.

Therefore, the number of moles of Br gas in in 2.8 L at 1.38 atm and 327 K is 0.144 moles.

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The mass (in dg) of the 24.5 mL of the substance having a specific gravity of 0.841 is 206.045 dg

We'll begin by obtaining the density of substance. This can be obtained as follow:

Density of substance = Specific gravity × density of water

Density of substance = 0.841 × 1

Density of substance = 0.841 g/mL

The mass of the substance can be obtained as illustrated below:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of substance = 0.841 × 24.5

Mass of substance = 20.6045 g

Multiply by 10 to express in dg

Mass of substance = 20.6045 × 10

Mass of substance = 206.045 dg

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By -320 pM, we need to increase the source power. A fluorescent material begins to produce visible light when energy is absorbed as a result of the incidence of X-rays, light waves, and electrons.

When a substance generates electromagnetic waves inside the longer wavelength range and makes them visible to the human eye, it is a fascinating occurrence. Let's first define fluorescence in order to comprehend this. This allows the substance to gently transition from the partly excited state to the ground state. Fluorescence is the term for this phenomena.

Detection limit = 3 × noise / signal to noise ratio

Detection limit  = 3× 75 pM / 5 = 15 pM

Source power = (noise / desired detection limit)² × current source power

Source power = (15 pM / 75 pM)² ×500 pM

                      = 0.36 ×500 pM

                       = 180 pM

Source power= 180 pM - 500 pM =

                       =-320 pM

Therefore, -320 pM, we need to increase the source power.

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The new pressure in the cylinder of the car engine as the piston is moved to the top is 1062.55kPa

Boyle's law states that "volume of a given quantity of gas is inversely proportional to its pressure  as long as temperature remains constant.

It is expressed as;

P₁V₁ = P₂V₂

Given the data in the question;

To determine the new pressure as the piston is at the top of the cylinder, we substitute our given values into the expression above.

P₁V₁ = P₂V₂

P₂ = P₁V₁ / V₂

P₂ = ( 1.0067107atm × 0.6250L ) / 0.0600L

P₂ = 0.629194188Latm / 0.0600L

P₂ = 10.4865698atm

P₂ = 1062.55kPa

Therefore, the new pressure in the cylinder of the car engine as the piston is moved to the top is 1062.55kPa

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Answer:

You'll get 2 moles of Fe at the end of the reaction

Explanation:

Since the reaction is: Fe2O3 + 2 Al → 2 Fe + Al2O3:

The relation between the reactant Al and the product Fe is, basically, 2:2. This means that you'll get the same amount of Fe as of Al you put into the reaction. So considering that you have 2 moles of Al and Fe2O3 in excess, you'll recieve 2 moles of Fe at the end.

The structures are shown in the image attached.

A structural formula is the representation of the molecule in which all atoms and bonds in the molecule are shown.

Since the question requires that all the lone pairs, formal charges and sigma and pi bonds should be shown, then the simple condensed structural formula becomes insufficient in this case.

I have attached images of the structural formula of sodium benzoate (image 1), benzoic acid (image 2)  and tetrahydrofuran (image 3).

All the formal charges, lone pairs as well as sigma and pi bonds are fully shown.

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this is how you find it:

23-11=12

the 12 is the amount of neutrons

475 g is the correct response to the query. This is true because the combined mass of two solutions with masses of 450 g and 350 g equals 800 g. 125 g of solid crystals are created and fall to the bottom of the container as a result of a chemical reaction.

As a result, the mass of the residual solution is equal to 475 g, or 800 g less 125 g. It is significant to observe that the masses of the two solutions that were combined originally do not equal those of the solid crystals or the leftover solution.

This is because the two solutions' chemical reaction when combined results in a transition of the matter that is resulting in the production of a new substance.

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The coordinates of the midpoint : (-1,-2.5)

Given

The coordinates of (3,-7) and (-5, 2)

Required

Midpoint

Solution

Can be formulated :

\(\tt midpoint=\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\)

Input the value :

x₁=3

x₂=-5

y₁=-7

y₂=2

\(\tt midpoint=(\dfrac{3+(-5)}{2},\dfrac{-7+2}{2})\\\\midpoint=(\dfrac{-2}{2},\dfrac{-5}{2})\\\\midpoint=(-1,-2.5)\)

The bond angles of the various portions of the phenyl alanine are;

Carbon 1 - 109 degrees

Carbon 2 - 120 degrees

Carbon 3 - 120 degrees

We know that the bond angle has to do with the dihedral angle that exists between two atoms that are connected to a single central atom. The central atom is always the atoms to which the other atoms are seen to be connected.

The structure of the compound phenylalanine has been shown in the image that is attached to this answer in some portions of the molecule we have been asked to be able to obtain the bond angle of the compound.

Clearly, in case 1, we have a saturated carbon atom and the bond angle is 109 degrees. In case 2 we have a carbon atom that has a double bond and the bond angle is 120 degrees. The same also does apply to carbon atom number 3.

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