Study this chemical reaction: 2 AgNO3(aq)+Mg(s) 2Ag(s)+Mg(NO;)_ (aq) Then, write balanced half-reactions describing the oxidation and reduction that happen In this reaction. oxldation: 0-D reductlon:

Answer:

B. the atmosphere

Explanation:

hope it helps

Answer:I'm going to give some fictitious values just so that we can get some perspective on the matter.

Let's say that the surface temperature of our sun is 10, the surface temp of the bigger star- the red giant formed from leaving the main sequence, has a temp of 0.2. of that- 2.

We can also say that the radius of our sun is 10, and the radius of the red giant is 1000. (100 times more)

Using the equation:

L

=

σ

A

T

4

σ

= The Stefan-Boltzmann constant =

5.67

×

10

−

8

But we can ignore the constant, as we are only interested in a ratio of these values.

L

S

u

n

=

4

π

(

10

)

2

×

10

4

=

1.26

×

10

7

L

S

t

a

r

=

4

π

(

1000

)

2

×

2

4

≈

2.01

×

10

8

2.01

×

10

8

1.26

×

10

8

≈

16

So the newly formed, red giant star is almost 16 times more luminous than the sun. This is owing to the increased surface area of the star due to the massively increased radius.

A small sidenote:

There is an equation that might be useful for comparing the radii, temperature and luminosity of main sequence stars. As red giants are not on the main sequence it could not be used here, but if you stumble across a question where they ask you to find the radius, luminosity or temperature given the other two, you can relate it to the sun's characteristics:

r

s

t

a

r

r

s

u

n

=

√

L

s

t

a

r

L

s

u

n

×

(

T

s

u

n

T

s

t

a

r

)

2

(I know, it's not a beauty to look at- but it works)

Where

X

s

u

n

is the radius, temperature, and luminosity of the sun. These are not often given in numerical values, but this equation serves well when asked to find e.g the radius of a star, in solar radii given that a star is twice as luminous and has 5 times the temperature of that of the sun.

Hence:

T

s

t

a

r

=

5

T

s

u

n

L

s

t

a

r

=

2

L

s

u

n

r

s

t

a

r

r

s

u

n

=

√

2

L

s

u

n

L

s

u

n

×

(

T

s

u

n

5

T

s

u

n

)

2

(cancel the common terms)

r

s

t

a

r

r

s

u

n

=

√

2

×

(

1

5

)

2

r

s

t

a

r

≈

0.057

r

s

u

n

(divide both sides by 0.0057)

17.5

r

s

t

a

r

≈

r

s

u

n

So the star's radius is almost 17.5 times that of the sun.

Hopefully, you find this info useful!

Explanation:

Answer:

considering the information given, the concentrations at equilbrium are:

CO(g) = 1.30 M

H2O(g) = 1.30 M

CO2(g) = 4.11 M

H2(g) = 4.11 M

Explanation:

The question requires us to calculate the concentration of CO, H2O, CO2 and H2, given the following information:

- number of moles of CO = 2.60 mol

- number of moles of H2O = 2.60 mol

- volume of container = 2.00 L

- temperature = 690°C

- equilibrium constant = 10.0

- balanced chemical equation:

Since the number of moles of CO and H2O were provided, as well as the volume of the container, we can calculate the concentration of this gases in moles per liter:

Also, since we have the equilibrium constant for this reaction and the concetrations of CO2 and H2 at equilibrium will be the same (they have the same stoichiometric coefficient), we can calculate the concentration of the products using the expression for Keq.

First, let's write the Keq expression for this reaction:

Considering,

[CO2] = [H2] = x

and rearranging this equation to calculate x:

Now, applying the value of Keq given by the question, and the values of concentration calculated previously, we'll have:

Therefore, considering the information given, the concentrations at equilbrium are:

CO(g) = 1.30 M

H2O(g) = 1.30 M

CO2(g) = 4.11 M

H2(g) = 4.11 M

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

Ether is the correct answer

Explanation:

It is based.

Answer:

The answer is C

3+

Explanation:

electron configuration =2,3

oxidation state of boron=3+

Step 1 - Understanding intermolecular forces and chemical bonds

There are two main interactions in chemistry: intermolecular forces and chemical bonds. The main difference between them is the distance between the atoms that are interacting.

A chemical bond may be ionic, covalent or metallic. It happens within the atoms or ions in a molecule. It thus keeps a molecule together.

Intermolecular forces, on the contrary, operate at higher distances, and they may be dipole-dipole or nonpolar interactions. They keep molecules together.

Let's take, as an example, the molecule of water:

As we know, the molecule of water is H2O, two H atoms and one O atom. The O-H atoms are bonded together. This is a chemical bond. But in a glass of water, as we could expect, there are over 10^23 molecules of water. They are kept together by an intermolecular force: hydrogen bonding.

Step 2 - Checking whether the statement is true

As we have seen in step 1, intermolecular forces do are forces of attraction between molecules. The statement is thus true.

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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Answer:

Pb(NO₃)₂ is the limiting reactant.

The equation is: Pb(NO₃)₂ (aq) + 2KCl (aq) →  PbCl₂ (s) ↓  + 2KNO₃ (aq)

Explanation:

We identify our reactants:

Pb(NO₃)₂ → Lead (II) nitrate

KCl → Potassium chloride

Our reaction is:

Pb(NO₃)₂ (aq)  +  2KCl (aq) →  PbCl₂ (s) ↓  + 2KNO₃ (aq)

1 mol of Lead (II) nitrate reacts to 2 moles of KCl, in order to produce 2 moles of potassium nitrate and 1 mol of slid Lead (II) chloride.

We determine the moles of the reactants:

6.06 g . 1mol /331.2 g = 0.0183 moles of Lead (II) nitrate

6.58 g . 1mol / 74.55g = 0.0882 moles of KCl

2 moles of KCl react to 1 mol of Pb(NO₃)₂

Then, 0.0882 moles of KCl may react to (0.0882 . 1) /2 = 0.0441 moles

We have 0.0183 moles of Pb(NO₃)₂ and we need 0.441 moles. Then, the

Pb(NO₃)₂ is our limiting reactant.

The answer is 1ml. The answer is 1ml because of calibration of this graduated cylinder

Answer:

1 mL

Explanation:

According to your definition, it is the difference between marked spaces divided by the # of spaces between marked values.

Difference between 2 marked values: 5 mL

# Of Spaces between marked values: 5

Calibration: 5 mL / 5 mL = 1 mL

Answer:

D. -80m/s^2

Explanation:

V = u + at

5 = 65 + a (0.75)

0.75a = -60

a = -60/0.75

a = -80m/s^2

Therefore, is decelerating at 80m/s^2

Answer:

\(\boxed {\boxed {\sf D. \ 80 \ m/s^2 \ down}}\)

Explanation:

We are asked to find the acceleration of a skydiver. Acceleration is the change in velocity over the change in time, so the formula for calculating acceleration is:

\(a= \frac{v_f-v_i}{t}\)

The skydiver was initially traveling 65 meters per second, then he slowed down to a final velocity of 5 meters per second. He slowed down in 0.75 seconds.

\(\bullet \ v_f = 5 \ m/s \\\bullet \ v_i= 65 \ m/s \\\bullet \ t= 0.75 \ s\)

Substitute the values into the formula.

\(a= \frac{ 5 \ m/s - 65 \ m/s}{0.75 \ s}\)

Solve the numerator.

\(a= \frac{-60 \ m/s}{0.75 \ s}\)

Divide.

\(a= -80 \ m/s^2\)

The acceleration of the skydiver is -80 meters per second squared or 80 meters per second squared down. The skydiver is slowing down or decelerating, so the acceleration is negative or down.

Distance in space is measured using the speed of light.

Answer:

Distance in space is measured using the speed of light.

Explanation:

I took the test

Answer:

Conservation of mass occur when your chemical equation is balanced.

So let's see if it is balanced:

6CO₂ + 6H₂O ------> C₆H₁₂O₆ + O₂

You need to have the same quantity of atoms of each element on the product side and reactant side.

Reactant side: 6CO₂ + 6H₂O

Product side: C₆H₁₂O₆ + O₂

Answer:

Explanation

I am sorry but please give detailed question

Answer:

4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O

Explanation:

An equation is balanced when there is an equal amount of each element on both sides of a reaction. To balance the elements, you can add coefficients to modify the amount of elements/molecules present. It is important to have the smallest coefficients possible.

The unbalanced equation:

NH₃ + O₂ -----> N₂ + H₂O

Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen

Products: 2 nitrogen, 2 hydrogen, 1 oxygen

The balanced equation:

4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O

Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen

Products: 4 nitrogen, 12 hydrogen, 6 oxygen

The two functional groups that the aminoacid has according to the picture are amine and carboxyl.

In chemistry and related areas, a functional group can be defined as a group of atoms bonded in a specific molecule that can affect the was the molecule reacts or the specific behavior of it.

In the case of the molecule presented, which is an amino acid, two functional groups can be identified:

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Answer:

The concentration of lead ion required to just initiate precipitation is -\(2.37\times10^-^5 M\)

Explanation:

Lets calculate -:

Solubility equilibrium -: \(PbI_2(s)\) ⇄ \(Pb^2^+ (aq) + 2I^- (aq)\)

Solubility product of \(PbI_2\) ,\(Q=[Pb^2^+]_i_n_i_t_i_a_l\) \([I^-]^2_i_n_i_t_i_a_l\) \(=9.8\times10^-^9\)

Concentration of \(I^-\)\(=[KI]=0.0492M\)

When the ionic product exceeds the solubility product , precipitation of salt takes place .

                                   \(Q_s_p\geq K_s_p\)

        \([Pb^2^+]_i_n_i_t_i_a_l\) \([I^-]^2_i_n_i_t_i_a_l\) \(\geq 9.8\times10^-^9\)

      \([Pb^2^+]_i_n_i_t_i_a_l\)  \([0.0492]^2\) \(\geq 9.8\times10^-^9\)

                       \([Pb^2^+]_i_n_i_t_i_a_l\) \(\geq \frac{9.8\times10^-^9}{[0.0492]^2}\)

                        \([Pb^2^+]_i_n_i_t_i_a_l\) \(\geq\) \(\frac{9.8\times10^-^9}{2.42\times10^-^3}\)

                        \([Pb^2^+]_i_n_i_t_i_a_l\) \(\geq\) \(2.37\times10^-^5 M\)

Thus , \(PbI_2\) will start precipitating when \([Pb^2^+]_i_n_i_t_i_a_l\)   \(\geq 2.37\times10^-^5 M\).    

Answer:

among these which is not a base is CaSO4

Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.

The root mean square velocity of gaseous xenon atoms at 25°C is 56.6 m/s.

The Vrms velocity is directly proportional to the square root of temperature and inversely proportional to the square root of molar mass.

To calculate the root mean square velcoity of gaseous xenon, we use the formula below.

Formula:

Where:

From the question,

Given:

Susbtitute these values into equation 1

Hence, the root mean square velocity is 56.6 m/s.

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Answer:

0.25 mol

Explanation:

Use the formula n=N/NA

n= number of mols

N =  number of particles

Nᵃ = Avogadros constant = 6.02 x \(\\10^{23\)

So, n= \(\frac{1.505 X 10^{23} }{6.02 X 10^{23}}\)

The 10 to the power of 23 cancels out and you are left with 1.505/6.02, which is approximately 1/4. This is the same as 0.25 mol.

Hope this helped :)

Answer:

'See Explanation

Explanation:

Determine the [OH−] , pH, and pOH of a solution with a [H+] of 9.5×10−13 M at 25 °C.

Given [H⁺] = 9.5 x 10⁻¹³M => [H⁺][OH⁻] = 1.0 x 10⁻¹⁴ => [OH⁻] = 1.0 x 10⁻¹⁴/9.5 x 10⁻¹³ = 0.0105M

pH = -log[H⁺] = -log(9.5 x 10⁻¹³) = - (-1202) = 12.02.

pOH = -log[OH⁻] = -log(0.0105) = -(-1.98) = 1.98

Now you use the same sequence in the remaining problems.

Answer:

its DDDDDDDDDDDDDDDDDD

The structure that is least likely to exist is HS.

Sulfur is an element in group 16. Sulfur is a divalent element that has two lone pairs of electrons. This means that sulfur forms compounds in which it is bonded to two atoms or groups.

All the molecules listed can exist because they consists of structures in which sulfur is bonded to two atoms or groups. The only structure that can not exist is HS because it does not satisfy the valency of sulfur.

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When hydrochloric acid (HCl) is passed through a saturated solution of sodium hydroxide (NaOH), a neutralization reaction occurs.

The following balanced chemical equation describes the reaction that takes place:

HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

The reaction involves the transfer of a proton (H⁺) from the acid to the base, forming water and a salt. The salt produced is sodium chloride (NaCl), which remains in solution.

The HCl acid is a strong acid and completely ionizes in water to form H⁺ and Cl⁻ ions. On the other hand, NaOH is a strong base and completely dissociates in water to produce Na⁺ and OH⁻ ions.

As HCl is added to the solution of NaOH, the hydroxide (OH⁻) ions react with the hydrogen ions (H⁺) in the acid to form water (H2O). The Na⁺ ions from the NaOH combine with the Cl⁻ ions from HCl acid to form NaCl, resulting in a solution of sodium chloride.

Overall, the passage of HCl through a saturated solution of NaOH results in a neutralization reaction that results in the formation of NaCl and water. The solution becomes neutral as the acidic and basic species are consumed in the reaction, resulting in the formation of a salt.

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Answer:

its sodium hydroxide

Explanation:

Answer:

Because the total energy of the enzyme has been used up and actions already complete

Explanation:

Catalyst are substance known to speed up rate of chemical reaction just like taking a short pathway. When velocity of catalyzed reaction reach maximum, at that moment reaction has reach it full potential (there is an equilibrium in reaction). there won't be any changes on further addition, and mostly indicate that Reaction is Complete

Answer:

true

Explanation:

Answer:

2547.4g

Explanation:

44.4×(23+35,5)

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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Answer:The pressure exerted by the gas is 100kPa

Explanation:Let's apply the Charles Gay Lussac law, to solve the question.

At constant volume, the pressure varies proportionally with the temperature.

P initial / T° initial = P final / T° final

50kPa / 20°C = P final / 40°C

Temperature has increased the double, so the pressure will be increased, the double too.

100 kPa

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