When 15. 3 g NaCl reacts with 81.70 g Pb(NO3)2, sodium chloride is the limiting reactant, according to the balanced equation below. How many grams of lead (II) nitrate will remain after the reaction stops?

2 NaCl + 1 Pb(NO3)2 → 2 NaNO3 + 1 PbCl2

Answer:

An heater, Oven, sun, and fireplaces

Chose which ever you want

Answer: Hello the compound is missing but I was able to get the Full question and missing compound . ( compound = copper sulfate )

answer : statement ; 2 , 3 and 5

Explanation:

The true statements regarding the coordination compound ( copper sulfate ) are :

During the coordination of compounds dative bonds exits between the transition metals and the Ligands molecules

Answer:

N2+(3)H2=(2)NH3

explanation:

Sorry, I won't understand your words.

Answer:

Do you mean a biology lab

Explanation:

what's the question

Answer:

[tex][SO_3]=0.25M[/tex]

Explanation:

Hello there!

In this case, since the integrated rate law for a second-order reaction is:

[tex][SO_3]=\frac{[SO_3]_0}{1+kt[SO_3]_0}[/tex]

Thus, we plug in the initial concentration, rate constant and elapsed time to obtain:

[tex][SO_3]=\frac{1.44M}{1+14.1M^{-1}s^{-1}*0.240s*1.44M}\\\\[/tex]

[tex][SO_3]=0.25M[/tex]

Best regards!

Answer:

See explanation and image attached

Explanation:

The first step in the reaction is the attack of the hydroxide ion from the base abstracting a proton from (S)-2-methylcyclopentanone.

The abstraction of a proton from water by the substrate yields the enol form in equilibrium with the keto form.

The product formed is racemic hence the optical activity of (S)-2-methylcyclopentanone is lost.

The Haber process generates ammonia from nitrogen and hydrogen gas, and nitrogen gas is the excess reagent.

Stoichiometry of reaction tells about the relative amount of reactants and products after and before the chemical reaction.

Given chemical reaction is:

N₂ + 3H₂ → 2NH₃

From the stoichiometry of the reaction it is given that:

1 mole of N₂ = produce 2 moles of NH₃

3 moles of H₂ = produce 2 moles of NH₃

1 moles of H₂ = produce 2/3=0.66 moles of NH₃

So, nitrogen is present in the excess quantity.

Hence, nitrogen gas is the excess reagent.

To know more about stoichiometry, visit the below link":

https://brainly.com/question/16060199

Answer:

Its N2

Explanation:

yea lol

BTw this is for Ck-12

Answer:

6.) 3, 12, 1, and 4   8.) 4, 1, and 3

Explanation:

By multiplying subscripts inside and outside of the parentheses you can count the number of atoms that are present. I recently answered a question for you and I did the math wrong I am going to go back and comment so you know which one and I will correct my errors. Sorry for the inconvenience!

the number of atoms in number 6:

N: 3

H: 12

P: 1

O: 4

the number of atoms for number 8:

Ca: 4

C: 1

O: 3

hope I clarified my mistake and helped you! :)

Answer:

15.32 days

Explanation:

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

Half-life (t½) = 3.83 days

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Time (t) =.?

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Number of half-lives (n) =?

N = N₀ / 2ⁿ

14.06 = 225 / 2ⁿ

Cross multiply

14.06 × 2ⁿ = 225

Divide both side by 14.06

2ⁿ = 225 / 14.06

2ⁿ = 16

Express 16 in index form with 2 as the base

2ⁿ = 2⁴

n = 4

Thus, 4 half-lives has elapsed.

Finally, we shall determine the time. This can be obtained as follow:

Half-life (t½) = 3.83 days

Number of half-lives (n) = 4

Time (t) =.?

n = t / t½

4 = t / 3.83

Cross multiply

t = 4 × 3.83

t = 15.32 days

Therefore the time for 225 g sample of Radon to decay to 14.06 g is 15.32 days

Answer:

The Enthalpy of neutralization

Explanation:

The reaction of a base (KOH) with an acid (HCl) produce water and its salt (KCl) is called Neutralization Reaction.

This neutralization releases 57kJ/mol.

As the type of enthalpy is due the type of reaction. This enthalpy is:

Answer:

endoplasmic reticulum

Explanation:

there it is

Answer:

The definition of the terms are:

1.) The extent of randomness in a system ENTROPY.

2.) Difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature is GIBBS FREE ENERGY.

3.) Solution in which no more solute can be dissolved in the solvent SATURATED SOLUTION.

4.)Sum of the internal energy plus the product of the pressure and volume for a reaction ENTHALPY.

5.) The condition that a reaction takes place without outside help SPONTANEITY.

Explanation:

ENTROPY is defined as the degree of disorderliness(randomness) of a system. It is usually denoted by 'S'. Entropy change is a factor that contributes to the driving force behind Chemical reactions. In a system, the greater the degree of disorderliness the higher the entropy and the greater the tendency for the reaction to take place. Therefore the extent of randomness in a system is ENTROPY.

GIBBS FREE ENERGY is defined as the difference of the enthalpy (of a system) minus the product of the entropy and absolute temperature. Both the enthalpy (H) and entropy (S) can determine how a chemical reaction will occur.A scientist J. Willard Gibbs related the two by introducing a third parameter called the FREE ENERGY. This is usually represented as (G). Mathematically,

∆ G = ∆H - T∆S

Where T is the absolute temperature of the system.

When ∆G is negative the reaction is feasible, that is, it will occur. When ∆G is positive the reaction is not likely to occur. When it is zero the reaction is at equilibrium.

SATURATED SOLUTION is defined as a solution in which no more solute can be dissolved in the solvent. This means that it's a solution that contains as much solute as it can dissolve at that temperature in the presence of undissolved solute particles. In a saturated solution, the dissolved solutes and undissolved solutes are in equilibrium at that temperature. Any change in temperature will disturb this equilibrium and the system must alter to counter the change.

ENTHALPY is defined as the Sum of the internal energy (E) plus the product of the pressure(P) and volume(V) for a reaction. This is usually represented with the symbol 'H'. Mathematically,

H = E + PV.

The rate of chemical reaction depends on the frequency of effective collision between the reacting particles. When this occurs,the colliding particles becomes activated with increased kinetic energy. This energy must exceed a particular energy barrier called activation energy ( an internal energy) before a reaction can take place while the heat of the reaction is called ENTHALPY (H).

SPONTANEITY is the condition that a reaction takes place without outside help. This reaction doesn't require any energy input because the products at a more stable lower energy state than the reactants.

Answer: B.) Object X Is A Conductor

Explanation: Since object X was able to lose all of its charge by being grounded, this means that its charges were able to move about freely. This strongly suggests that object X is a conductor. If object X had been an insulator, the ground would have had virtually no effect on its net charge.

Answer:

Distance is speed x time

So 200 x 2 =400mi

Answer:

11.6 mol O₂

Explanation:

In order to solve this problem we need to convert moles of carbon dioxide (CO₂) into moles of oxygen gas (O₂). To do so we'll use a conversion factor containing the stoichiometric coefficients of the balanced reaction:

Answer:

Static energy is an energy between two charges.

Explanation:

a). A van de Graff generator builds up a positive electric charge on the dome by separating the negative static electric charges from the positive static charge using a quickly moving belt. The positive charge collects on the large metal dome of the generator. When the charge builds up is large enough, a lighting like spark can shoot from the dome to a grounded discharge rod.

             Like electric charges always repel each other, and oppositely electric charges will attract each other. When the aluminum pans are being charged by the van de Graff generator, then each of them attain the same positive polarity similar with the dome. Thus,  positive charge starts to accumulate over the surface of each of the pie pan. Each aluminum pan repels the others. These repulsive forces between the pans are so strong that they succeed in overcoming the gravity force and thus the top of the pan is pushed away from the generator's dome.

b). Static electricity is produced by a concentration of negative and positive electric charges. Like charges pushes away each other while unlike charges pulls each other.

            Objects generally have same numbers of positive charges as well as negative charges. And if there is any small imbalance in numbers of the charges on the object, it is charged.

            Negative charges easily torn away from the materials like the fur or hair. Also, the negative charges are held on other materials like the plastics. If we rub a plastic rod with fur, the negative charges will get transferred from fur to rod. The rod gets negatively charged and the fur is positively charged. As a result, the rabbit fur and the plastic rod were attracted to each other.

c). Coulomb's law stated that :

  [tex]$F=\frac{KQ_1Q_2}{d^2}$[/tex]    .............(i)

where, [tex]$Q_1$[/tex]  and [tex]$Q_2$[/tex] are the charges of two objects d is the distance between two objects.

As from the above equation, we can say that force of electrical attraction between two objects depends on the charges and the distance between objects.

1. The electrical force between two charged object is inversely proportional to the distance of separation between two objects.

Decreasing separation distance (d) between the objects will increase its attraction force.

2. And, increasing the charges of two objects(+ve and -ve) increases the force of attraction between two objects.

Answer:

[tex]\boxed {\boxed {\sf 2 \ M \ KOH}}[/tex]

Explanation:

Molarity is a measure of concentration in moles per liter.

The first step is to convert the amount of grams given to moles. The molar mass is used. This found on the Periodic Table and it's the same value as the atomic mass, but the units are grams per mole.

We have 224 grams of KOH. Look up the molar masses for the individual elements.

Since the compound's formula has no subscripts, 1 formula unit has 1 atom of each element. We can simply add the molar masses together to find KOH's molar mass.

Use this number as a ratio.

[tex]\frac {56.105 \ g\ KOH}{1 \ mol \ KOH}[/tex]

Multiply by the value we are converting: 224 g KOH

[tex]224 \ g \ KOH *\frac {56.105 \ g\ KOH}{1 \ mol \ KOH}[/tex]

Flip the ratio so the units of grams KOH cancel.

[tex]224 \ g \ KOH *\frac {1 \ mol \ KOH}{56.105 \ g\ KOH}[/tex]

[tex]224 *\frac {1 \ mol \ KOH}{56.105}[/tex]

[tex]\frac {224}{56.105} \ mol \ KOH[/tex]

[tex]3.992514036 \ mol \ KOH[/tex]

Remember molarity is moles per liter.

[tex]molarity = \frac{moles}{liters}[/tex]

We just calculated the moles and we know there are 2 liters of solution.

[tex]molarity = \frac{ 3.992514036 \ mol \ KOH}{ 2 \ L}[/tex]

[tex]molarity= 1.996257018 \ mol \ KOH/ L[/tex]

First, let's round. The original values have 3 and 1 significant figures. We go with the lowest number: 1. For the number we found, that is the ones place.

The 9 in the tenths place tells us to round to 1 up to a 2

[tex]2 \ mol \ KOH/ L[/tex]

Next, convert units. 1 mole per liter is equal to 1 molar or M.

[tex]2 \ M \ KOH[/tex]

The molarity of the solution is 2  M  KOH

Answer:

2M of KOH

Explanation:

224 g of KOH in 2 liters of KOH

?  of KOH in 1 liters of KOH

[tex]\frac{224}{2} = 112g of KOH[/tex]

1 mole of KOH = 39 + 16+ 1 = 56g

?mole of KOH = 112g

[tex]\frac{112}{56}[/tex]moles of KOH = 2 moles/1liter of KOH

written as 2M KOH

Answer:

D

Explanation:

Sugar will dissolve faster when you stir the solution quickly because the act of stirring increases kinetic energy which increases the temperature.

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Answer:

According to who knows who I believe the answer is k2So4 + SrI2 ---> SrSo4 +2KI

S, 2. S, 2

K, 2. K, 2

I, 2. I, 2

O, 4. O, 4

Answer:

The sound from the whales singing is faster than that from the birds chirping.

Explanation:

The sound from the whales singing will travel faster than the sound from the birds chirping because sound travels faster through a medium than through air.

In this case the whales are in water which is a medium while the birds are in the air and thus, the sound from the water will travel faster.

Answer:

The process of the formation of coal and oil is a very gradual and slow process.

Explanation:

The process of the formation of coal and oil is a very gradual process that takes up to millions of years.

Answer:

73.33% is the percent yield

Explanation:

Percent yield is defined as:

Actual yield (4.883g) / Theoretical yield * 100

Based on the reaction:

Cu(NO₃)₂(aq) + K₂CO₃(aq) → CuCO₃(s) + 2KNO₃(aq)

1 mole of copper nitrate reacts per mol of potassium carbonate.

To solve this question we must find limiting reactant. With limiting reactant we can find the theoretical moles of solid produced and its mass as follows:

Moles Cu(NO₃)₂:

0.1639L * (0.329mol / L) = 0.0539 moles

Moles K₂CO₃:

0.1639L * (0.528mol / L) = 0.0865 moles

As the reaction is 1:1, the limiting reactant is Cu(NO₃)₂.

1 mol of Cu(NO₃)₂ produces 1 mol of CuCO₃. That means theoretical moles produced are 0.0539 moles. And the mass is:

Mass CuCO₃ -Molar mass: 123.55g/mol-

0.0539 moles * (123.55g / mol) = 6.659g of CuCO₃ is the theoretical mass

And percent yield:

4.883g / 6.659g * 100

Answer:

lenses is used to refract light inward or outward

there are two type of lenses. Concave and convex lense

Convex lense converge ray of light

Concave lense diverge ray of light

useful application =:

=> camera

=> flashlight

=> lasers

=> Binoculars and Telescope

hope it helps

Answer:

Explanation:

Lenses are made of glass or other transparent materials for light. They are optically dense so light slows down on entering it. It is called refraction which bends the light on entering and leaving the lenses.

Refraction by lenses can be used for all kinds of optical applications, e.g. camera, telescope, magnifying glasses, solar heating.

Answer:

With Br2 - Bromobenzene

With Cl2 - Chlorobenzene

With HNO3- Nitrobenzene

With H2SO4 - Benzenesulphonic acid

With HCOCl - Benzoyl chloride

With 1-chloro-2,2-dimethylpropane - 2,2dimethyl-1-phenyl propane

Explanation:

The common thread joining all these reactions is that they are all electrophillic reactions. They are so called because the attacking agents in each reagent is an electrophile. Electrophiles are species that have electron deficient centers and are known to attack molecules that are high in electron density at regions of high electron density.

The benzene molecule has rich electron density. Any substituents that donates electrons to the ring improves the likelihood that benzene will undergo electrophillic substitution reactions while electron withdrawing substituents decrease the likelihood that benzene will undergo electrophillic substitution reactions.

The names of the compounds formed when benzene undergoes electrophillic reaction with the attacking agents listed in the question are displayed in the answer section.

Answer:

Oxygen and Silicon

Explanation:

Oxygen and Silicon are the most abundant elements in magma, SiO₂

-TheUnknownScientist