Determine the quantity of nitrogen atoms in 15.0
grams of Pb(NO₂)2

A plant characteristic that would best "| a flowers that emit a rotten odor".

Hyenas belong to a specific class of carnivores known as scavengers. The carcasses of animals that scavengers did not slaughter are consumed by scavengers. The majority of hyenas hunt as well. An organism is referred to as a scavenger if it primarily feeds decaying biomass, including such animal or plant matter.

Animals that use the dead bodies of other animals even though sustenance are known as scavengers. Vultures, hyenas, coyotes, raccoons, etc. are a few examples.

The flowers which emit rotten odor attract most of the scavengers.

Thus, the correct option is A

To know more scavengers.  visit:

https://brainly.com/question/24953712

#SPJ1

Answer: A O flowers that emit a rotten odor

Explanation: Did this in a test

The equilibrium expression of the given chemical equation Kc =

[tex]\frac{(CaCO_{3} ) (H_{2} )^{4} }{(CaO) (CH_{4} ) (H_{2} O)^{2} }[/tex]

Equilibrium expression of a chemical equation is defined as the equations equilibrium constant which is the rate constant for the forward reaction divided by the rate constant for the reverse reaction.

The equilibrium expression (Kc)of a chemical equation can be written using the following formula:

KC= [C] [D].../[A] [B] ...

Therefore to show the equilibrium expression of the following equation:

Kc = [tex]CaO + CH_{4} + 2H_{2} O --- > CaCO_{3} + 4H_{2}[/tex]

kc = [tex]\frac{(CaCO_{3} ) (H_{2} )^{4} }{(CaO) (CH_{4} ) (H_{2} O)^{2} }[/tex]

Learn more about equilibrium constant here:

https://brainly.com/question/28158922

#SPJ1

Answer

The dissociation of

Zn₃(PO₄)2

Answer:

D

Explanation:

A balanced equation has the same number of atoms for each element on both sides of the equation. It is important for chemical equations to be balanced as only then will it show how the reactants and products are related to each other in terms of mole ratio. The reactants are found on the left-hand side of the arrow, while the products are found on the right-hand side.

In this question, the elements are Pb and O.

Let's count the number of atoms of each element in the unbalanced equation.

Reactant

Pb: 1 atom

O: 2 atoms

Product

Pb: 1 atom

O: 3 atoms

The number of Pb atoms are already balanced, but not the for the O atoms. Note that balancing the O atoms also affects the number of Pb atoms.

2 PbO₂ → 2 PbO +O₂

Now, the equation is balanced with 2 Pb atoms and 4 O atoms on both sides.

Thus, option D is correct.

To learn more about balancing chemical equations, check out: https://brainly.com/question/21406528

Atoms become more stable when they achieve lower energy states by losing or gaining

electrons.

As we know that atoms wants to attain stable configuration either by losing electron or by gaining electron.

Let us take an example of electropositive atom Na, which have 11 as atomic number. It have one electron more than stable electronic configuration. So, it lose one electron and attain stable configuration of Neon.

Similarly, electronegative atom F, which have 9 as atomic number. It have one electron less than stable electronic configuration. So, it gain one electron and attain stable configuration of Neon.

Thus, we concluded that atoms become more stable when they achieve lower energy states by losing or gaining electrons.

learn more about stable Electronic configuration:

https://brainly.com/question/14275448

#SPJ13

Answer:

Highest voltage is generated by the Ni°|Ni⁺²||Cu⁺²|Cu° Voltaic Cell in the amount of E°(cell) = 0.597 volt.

Explanation:

The standard voltage of a voltaic cell can be calculated using the expression E°(cell) = E°(redn) - E°(oxdn).

The symbology of the voltaic cell is generally shown as

[ Oxdn Rxn || Redn Rxn ].

That is, for the cell Mn°|Mn⁺² || Zn⁺²|Zn° the reduction reactions (as given in the Table of Standard Reduction Potentials) are:

Mn⁺² + 2e⁻ => Mn°; E°(Mn⁺²|Mn°) = -1.17 volts

Zn⁺² + 2e⁻ => Zn° ; E°(Zn⁺²|Zn°) = -0.76 volts

Note => One can search engine 'Table of Standard Reduction Potentials'. A number of citations will be given.

Since in the symbolic cell the order is oxidation rxn || reduction rxn ;  the manganese reaction should be reversed and added to the zinc reduction reaction giving the standard net cell reaction, E°(cell). That is ...

Oxidation Rxn:  Mn° => Mn⁺² + 2e⁻

Reduction Rxn: Zn⁺² + 2e⁻ => Zn°

Net Cell Rxn:  Mn° + Zn⁺² => Mn⁺² + Zn°

Therefore, the Standard Cell Potential for the Mn°|Mn⁺² || Zn⁺²|Zn° cell is ...

E°(cell) = E°(redn) - E°(oxdn) = E°(Zn°) - E°(Mn°) = (-0.76v) - (-1.17v) = 0.41 volt

-----------------------------------------------------------------------------

The cell potentials for the remaining cells are calculated the same way. That is ...

For the Zn°|Zn⁺² || Ni⁺²|Ni° cell

E°(Zn|Ni) = E°(Ni) - E°(Zn) = (0.257v) - (-0.76v) = 0.503 volt, and

For the Ni°|Ni⁺² || Cu⁺²|Cu° cell

E°(Ni|Cu) = E°(Cu) - E°(Ni) = (+0.34v) - (-0.257v) = 0.597 volt (highest voltage)

__________________________________________

NOTE => When using the Table of Standard Reduction Potentials it is useful to remember that the electron flow is always from the more negative voltage to the more positive voltage.  That is, the element or polyion with more negative negative voltage is always the oxidation process while the more positive voltage is always the reduction process.

Also, when calculating the Standard Cell Potential the value determined must always be positive. Otherwise, the cell combination shown in the symbolic form will be a no reaction. (Good to know for questions like 'Which of the following will not occur?') That is  E°(cell) = E°(redn) - E°(oxdn) > 0.00 volts.

Hope this helps. :-)

The molar mass of a molecule corresponds to the sum of the atomic weights of each element multiplied by the number of atoms of the respective element. The atomic weights can be found in the periodic table. For each element the atomic weight is:

Cu=63.546u

S= 32.065 u

O4= 15.999u

The molar mass of the molecule will be:

Answer: The molar mass of CuSO4 is 159.607g/mol

Exothermic reaction

The given diagram is the diagram showing the change in the heat of the reaction of a substance.

If the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings but the enthalpy change is positive, the reaction is exothermic showing that the heat is absorbed from the surrounding.

From the diagram, the energy of the product is C while the energy of the reactant is A.. Since the energy of the product is lower than that of the reactant, hence the change of enthalpy will be expressed as:

Since the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings.

1,500 is the answer i had to put more than 20 characters to write this answer

When two of those balls or partials are stuck (bonded) to each other, they represent atoms.

It is to be noted that Ball and stick models are three-dimensional models in which atoms are represented by different colored spheres and bonds are represented by sticks that connect the spheres. Colors are assigned to certain atoms; for example, black is commonly used to symbolize carbon while white is used to represent hydrogen.

An atom is the smallest ordinary matter unit that makes up a chemical element. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized. Atoms are incredibly tiny, measuring around 100 picometers across.

Atoms are indestructible particles that cannot be generated or destroyed during a chemical process. Atoms of the same element have the same mass and chemical characteristics. Distinct elements' atoms have different masses and chemical characteristics. Atoms combine in modest whole-number ratios to produce compounds.

Learn more about Atoms:
https://brainly.com/question/6258301

#SPJ1

Explanation:

We have a reaction between iron and oxygen from the air and Iron (III) oxide is produced.

First we have to determine the formulas of our compounds. Iron is a solid and its formula is just Fe. Oxygen is a diatomic gas and its formula is O₂. The formula of iron (III) oxide is Fe₂O₃. Why? Because the oxidation state (or charge) of oxygen in oxides is always 2- and the oxidation state or charge or iron in this case is 3+ (because between brackets we have the number III). Oxides are neutral compounds, if we want to form a neutral compound we will have to:

So the unbalanced reaction is:

___ Fe + ___ O₂ ---> ____ Fe₂O₃

The first step to balance an equation is to determine the number of atoms of each element that we have on both sides.

___ Fe + ___ O₂ ---> ____ Fe₂O₃

Fe: 1 Fe: 2

O: 2 O: 3

We have one atom of Fe on the left side of the equation and 2 atoms of Fe on the right side, so we have to change the coefficient for Fe on the left and write a 2.

2 Fe + ___ O₂ ---> ____ Fe₂O₃

Fe: 2 Fe: 2

O: 2 O: 3

Now Fe is balanced, but O is still unbalanced. We have 3 atoms of O on the right side of the equation and just 2 on the left side. The coefficient for O₂ that balances the equation should be 3/2.

2 Fe + 3/2 O₂ ---> ____ Fe₂O₃

Fe: 2 Fe: 2

O: 3 O: 3

But we can't have fractions as coefficients, they must be entire numbers. So we will have to multiply all the coefficients by 2 to get rid off the fraction.

4 Fe + 3 O₂ ---> 2 Fe₂O₃

Fe: 4 Fe: 4

O: 6 O: 6

Now the equation is balanced.

First, to determine the mass of iron (III) oxide we will have to convert 500.0 g of Fe into moles. To do that we need the molar mass of Fe. Then using the molar ratio between Fe and Fe₂O₃ we can find the number of moles produced. And finally with the molar mass of Fe₂O₃ we can find the mass of Fe₂O₃.

molar mass of Fe = 55.85 g/mol

molar mass of Fe₂O₃ = 159.69 g/mol

mass of Fe₂O₃ = 500.0 g of Fe * 1 mol of Fe/(55.85 g/mol) * 2 moles of Fe₂O₃/(4 moles of Fe) * 159.69 g/mol

mass of Fe₂O₃ = 714.8 g

Answer: the mass of iron (III) oxide produced is 714.8 g

The word equation:

carbon dioxide (g)  <======> carbon dioxide(aq)

carbon dioxide(aq) + water  ========> carbonic acid(aq)

The balanced chemical equation

CO2(g)  <=========> CO2(aq)

CO2 + H20 =========> H2CO3(aq)

Precipitation is any liquid or frozen water that condenses in the atmosphere and falls to the earth. Snow, sleet, and rain are only a few of its many forms. Along with evaporation and condensation, precipitation is one of the three major processes that make up the global water cycle.

Precipitation is created when water vapor in clouds condenses into progressively larger droplets of water. When the drops are heavy enough, they eventually reach the Earth. If a cloud is cooler, as it would be at higher elevations, the water droplets may freeze to generate ice. These ice crystals eventually fall to the Earth as snow, hail, or rain, depending on the temperature both inside the cloud and at the surface.

The word equation:

carbon dioxide (g)  <======> carbon dioxide(aq)

carbon dioxide(aq) + water  ========> carbonic acid(aq)

The balanced chemical equation

CO2(g)  <=========> CO2(aq)

CO2 + H20 =========> H2CO3(aq)

To learn more about precipitation from the given link

https://brainly.com/question/1783904

#SPJ9

Given that carbonic acid, H₂CO₃, has a pKa1 = 6.37 and a pKa2 = 10.33,  if you want to make pH 7  buffer solution starting with NaHCO₃ , we add 0.10M HCL .

a) NaHCO₃ is salt of weak acid and a strong base . the initial pH is greater than 7 means it is basic and we should add 0.10 M HCL to the pH which is 7.

Thus, Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33,  if you want to make pH 7  buffer solution starting with NaHCO₃ , we add 0.10M HCL .

To learn more about carbonic acid here

https://brainly.com/question/15172054

#SPJ1

The  ℓ = [tex]\leq 4[/tex]

To learn more about  mℓ and ℓ refer :

https://brainly.com/question/11152480

#SPJ9

The density of ammonia is 00117 gm|M|.

We know D = MP/RT

Now, P = 1600 mm = 1600/760=2.10atm

∴D=[tex]\frac{17\times2.10}{821\times 373}[/tex]

D= 0.00117 gm|M|

Density of a material shows the density of that material in a  given area. The density of a material is defined as its mass per unit volume. Density is basically a measure of how tightly  packed a substance is. It is a unique physical property of a particular object. The principle of density was discovered by the Greek scientist Archimedes. Calculating density is easy  if you know the formula and understand the  units involved. The symbol ρ means density, or it can also be indicated by the letter D.

To learn more about density, refer;

https://brainly.com/question/15164682

#SPJ9

d = 0.00117gm|M|

The density of ammonia gas is 0.00117gm|M|

Here we want to find density of ammonia gas,

The equation is,

                       d = MP/RT,

where d is the gas's density in g/L,

M is the gas's molar mass in g/mol,

P is the gas's pressure in ATM, and R is the gas law constant.

The equation shows that as the density of a gas increases, so does its molar mass.

given ,

M = 17.1 g/mol

P = 1600mmHg => (to convert to ATM) = 1600/760  = 2.10 atm

R= 8.31J/K⋅mol

T= 373°c

substituting values,

        d = (17.1 x 2.10) / 8.31 x 373

         d  = 0.00117gm|M|

To learn more about density of gas refer to :

https://brainly.com/question/18687508

#SPJ9

According to the mole concept, the mass in grams of 1.45  mole of barium bromide is 430.853 g.

Mole concept is a concept according to which mole  is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Number of moles is calculated by the formula, :mass/molar mass

So for the given problem mass=number of moles×molar mass

=1.45×297.14=430.853 g

Hence, 430.853 g is the mass of 1.45 moles of barium bromide.

Learn more about mole concept,here:

https://brainly.com/question/22540912

#SPJ1

The bonds with more polarity are a)C-Cl, b)Si-Cl and c)N-Mg

The electronegative values are indicated by the term e, whose highest difference values indicate that the bond is highly polar. For the given values,

a) C-H and C-Cl, the Electro Negativity difference between C-Cl is 3.16-2.55 = 0.61 and electronegativity between C-Cl is 2.55-2.1 = 0.45. Since the electronegativity of C-Cl is greater than the electronegativity of C-H, C-Cl is more polar.

b)The electronegativity of Si-Cl is 3.16-1.9 = 1.26 and electronegativity of Si-Li is 1.98-0.98 = 0.98. Since the electronegativity of Si-Cl is greater than Si-Li, it is more polar.

c) In N-Cl and N-Mg, the Electro Negativity difference between N-Cl is 3.16-3.04 = 0.12, and the electronegativity between N-Mg is 3.04-1.31 = 1.73 Since the electronegativity of N-Mg is greater than the electronegativity of N-Cl, N-Mg is more polar.

To know more about electronegativity, click below:

https://brainly.com/question/2415812

#SPJ1

A standard unit is a unit that can be used everywhere as a basic unit of measurement.

350g = 0.350 kg =3.5 x [tex]10^{-2}[/tex] kg

0.4 gl = 1514.16 ml = 1.5 x [tex]10^{3}[/tex] ml

Inches, pounds, and pints are examples of standard units of measurement. Steps, hand spans, cubes, counters, and sweets are examples of non-standard units of measurement.

A standard unit is a unit that can be used everywhere as a basic unit of measurement.

The SI is a coherent system of measurement that begins with seven base units: the second (symbol s, the unit of time), the metre (m, length), the kilogram (kg, mass), the ampere (A, electric current), the kelvin (K, thermodynamic temperature), the mole (mol, substance amount), and the candela (cd, luminous intensity).

To learn more about :  Standard  units

Ref : https://brainly.com/question/390291

#SPJ9

Answer:

B: A set of steps that help scientists gather knowledge.

Explanation:

It's a series of steps that starts with an observation and ends with a Report/conclusion. The others don't make sense.

Please give brainliest!!

In a vacuum, all different types of light waves have the same speed (Option 3).

Light is energy emitted as waves that travel to a given frequency and speed. These light waves emit electricity and magnetism and have the same speed when they are found in space (vacuum).

Light waves can take many different forms which include:

Therefore, with this data, we can see that light waves travel to a given velocity which is the same in equal conditions as occurs in space where conditions are equal.

Learn more about light waves here:

https://brainly.com/question/15033563

#SPJ1

Scientific research in the 1800s revealed that the rate of infection in surgery patients drastically decreased when antiseptics were used to clean wounds before procedures. It benefited society because it improved humans' understanding of

how infections spread.

In our day to day life, various different types and unknown diseases we are facing. This can be due to change in our activities or by using harmful chemicals in industries or may be due to experimental activities in laboratory.

If we use antiseptic before the procedures to clean wounds, it kill the bacteria and other virus and make it clean. This protect us from the upcoming harmful effects of uncleaned wounds.

So, it make us a step towards the healthy and wealthy life.

Thus, we concluded that using antiseptics to clean wounds before procedures. It benefited society because it improved humans' understanding of

how infections spread.

learn more about antiseptic:

https://brainly.com/question/13242539

#SPJ13

Answer & Explanation

Based on the PubChem database readily available online, this acid is called Sulfuric acid

Explanation:

First let's find the molar mass of CaCl2:

Ca = 40.1 g/mol

Cl = 35.5 g/mol

40.1 + (35.5*2) = 111.1 g/mol

So:

111.1 g ---- 1 mol

x g ---- 11.52 mol

x = 1,279.872 g

Answer: 1,279.9 g

The density formula is the mass of an object divided by its volume. That is d = m/v.

Density = mass/ volume = 95.5/ 155.312 = 0.615 [tex]g/cm^{3}[/tex].

a rectangular solid with a mass m = 95.5 g,

length = 3.55 cm

height = 250 mm = 25 cm

and width =  0.0175 m. = 1.75 cm

volume of the rectangular solid = 3.55 * 25 * 1.75 =155.312 [tex]cm ^{3}[/tex]

density = mass/ volume = 95.5/ 155.312 = 0.615 [tex]g/cm^{3}[/tex].

To learn more about :  Density

Ref : https://brainly.com/question/1354972

#SPJ9

1) List the known and unkown values

Initial conditions

Volume: 1.7 L

Pressure: 1.2 atm

Temperature: 20ºC

Final conditions

Volume: 1.1 L

Temperature: 90ºC

Pressure:

2) Set the equation

3) Convert Celsius to Kelvin

Initial temperature

Final temperature

4) Plug in the known values

.

.

.

The new pressure in the coffee thermos is 2.3 atm.

.

The volume in cubic meters is 4096m.

To calculate the volume or volume of an object or room in cubic feet measure the length, width, and height in feet and multiply length x width x height. The volume of an object is the amount of space it fills. Large capacity is measured in cubic meters m3. Smaller volumes are measured in cubic centimeters cm3 or cubic millimeters mm3.

Board foot is the most commonly used standard in lumber and lumber. One foot of board is equivalent to 144 cubic inches of lumber, or a board 1 inch thick, 12 inches wide, and 1 foot long. The second unit of measure is code. The volume of a box can be calculated as length x width x height. Taking a single-layer box as an example 102 x 102 x 102 is equivalent to 1,061,208 cubic millimeters. In metric units, volume is usually expressed in millimeters and liters.

Learn more about Cubic meters here:-https://brainly.com/question/10868015

#SPJ1

Burning, frying, rusting, and rotting are a few instances of chemical transformations. The physical transformations of boiling, melting, freezing, and shredding are a few examples. If enough energy is provided, many physical changes can be reversed. A different chemical reaction is the only way to undo a chemical change.

To learn more about :  Chemical change

Ref : https://brainly.com/question/1222323

#SPJ9

Answer:

Explanation:

We start by completing the balanced equation of the reaction.

We have that as:

Now, we want to get the limiting reagent

The limiting reagent is the reagent that produces less amount of the product

Now, let us get the number of moles of CaCO3 that reacted

That would be the mass of CaCO3 given, divided by the molar mass of CaCO3

The molar mass of CaCO3 is 100 g/mol

Thus, the number of moles of CaCO3 that reacted will be:

Now, let us get the number of moles of CO2 produced

That would be 0.0035 mol too since the mole ratio of CaCO3 to CO2 in the balanced equation of reaction is 1:1

We proceed to get the number of moles of HCl that reacted

We can get this by multiplying the given molarity by the volume in liters

We have that as:

From here, the number of moles of CO2 produced is half, since the mole ratio is 1 to 2

The number of moles of CO2 produced will be:

The number of moles of CO2 produced by CaCO3 is lesser, and that means it is the limiting reagent

Now, to get the mass of CO2 produced in theory, we multiply the number of moles by the molar mass of CO2

The molar mass of CO2 is 44 g/mol

Thus, we have the mass that was produced as:

The Lewis structure shows the arrangement of the elements that are in the compound. The Lewis structure of the compound is shown in the image attached.

The Lewis structure is the structure that shows the way that the electrons that are in the molecule are arranged. The Lewis structure must involve the symbols of the elements that are in the compound as well as the number of electrons that are in each of the atoms.

Having said so, the Lewis structures of the compound could be shown in the image that is attached. The charges that are in each of the atoms have also been showed in the image.

Learn more about Lewis structure:https://brainly.com/question/20300458

#SPJ1

Answer: The concentration of solution is, 62.5 g/100 mL

Explanation:

Mass of solute = 25 g

Volume of solvent (water) = 40 mL

Now we have to calculate the concentration of solution.

Now put all the given values in this expression, we get:

Thus, the concentration of solution is, 62.5 g/100 mL