60 points! please help me! i will appreciate it

Decomposition reaction results in the formation of the products by splitting the reactants. Moles of mercury(ii) oxide needed are 15.63 moles.

Moles are the ratio of mass and the molar mass of the compound or the molecule.

Moles of oxygen are calculated as:

[tex]\begin{aligned}\rm n &= \rm \dfrac {mass}{molar\; mass}\\\\&= \dfrac{250}{32}\\\\&= 7.8125 \;\rm moles\end{aligned}[/tex]

The balanced chemical reaction can be shown as,

[tex]\rm 2HgO \rightarrow 2Hg + O_{2}[/tex]

From the reaction, it can be said that 1 mole of oxygen requires 2 moles of mercury oxide.

Moles of mercury oxide are calculated as:

[tex]\begin{aligned} \rm n HgO& = (7.8125 \;\rm moles \; O_{2}) \times (\dfrac{2 \;\rm moles\; HgO}{1 \;\rm mole \; O_{2}})\\\\\rm n HgO &= 15.625 \;\rm moles \end{aligned}[/tex]

Therefore, option C. 15.63 moles of mercury (II) oxide is needed.

Learn more about moles here:

https://brainly.com/question/26898237

a leguminous plant, Phaseolus aureus, whose seeds are used as food in India.

Answer:

Green Gram is a small round edible green bean which is also known as moong ki daal in the subcontinent.

Explanation:

The green gram bean which is also known as the mung, maash or moong, is a plant species in the legume family. The green gram bean is mainly cultivated in East, Southeast and South Asia. It is used as an ingredient in both savoury and sweet dishes.

Answer:

Acrylonitrile Styrene Acrylate

Answer:

dam aye someone give this person a medal

Explanation:

When a solution of MgCl₂ and a solution of AgNO₃ are mixed, the net ionic equation obtained is:

2Cl¯(aq) + 2Ag⁺(aq)  —> 2AgCl(s)

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

In solution

MgCl₂(aq) —> Mg²⁺(aq) + 2Cl¯(aq)

AgNO₃(aq) —> Ag⁺(aq) + NO₃¯(aq)

The reaction proceeds as follow

MgCl₂(aq) + AgNO₃(aq) —>

Mg²⁺(aq) + 2Cl¯(aq) + 2Ag⁺(aq) + 2NO₃¯(aq) —> 2AgCl(s) + Mg²⁺(aq) + NO₃¯(aq)

Cancel out the spectator ions (i.e Mg²⁺ and NO₃¯) to obtain the net ionic equation

2Cl¯(aq) + 2Ag⁺(aq)  —> 2AgCl(s)

Learn more about chemical equation:

https://brainly.com/question/7181548

When a solution of MgCl₂ and one of AgNO₃ are mixed, the net ionic equation is 2Cl¯(aq) + 2Ag⁺(aq) → 2AgCl(s).

Net ionic reactions are those reactions in which each species are written in their respective ions form except the spectator ions.

Given chemical reaction is:

MgCl₂(aq) + 2AgNO₃(aq) → 2AgCl(s) + Mg(NO₃)₂(aq)

Ionic form of the given reaction will be written as

Mg²⁺(aq) + 2Cl¯(aq) + 2Ag⁺(aq) + 2NO₃¯(aq) → 2AgCl(s) + Mg²⁺(aq) + NO₃¯(aq)

Spectator ions are those which are commonly present on both side of the reaction and for this reaction they are Mg²⁺ and NO₃¯. So the net ionic reaction will be:

2Cl¯(aq) + 2Ag⁺(aq) → 2AgCl(s)

Hence required net ionic reaction is 2Cl¯(aq) + 2Ag⁺(aq) → 2AgCl(s).

To know more about net ionic reaction, visit the below link:
https://brainly.com/question/25604204

#SPJ4

Answer:

Explanation:

When you balance a chemical equation, you change coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow

After subtracting the volume needed from the volume dispensed, we got a remainder of 35ml

Given Data

Let us compute the amount of excess hexane/ the volume that will remain

Remainder = The difference in volume dispensed and the volume needed

Remainder = 40-5

Remainder = 35 ml

The remainder is 35ml

Learn more about subtraction of numbers here:

https://brainly.com/question/4721701

If you dispense 40 ml of hexane, but it turns out you only need 5 ml, then we should have 35 mL of remained hexane.

Remaining volume of any liquid will be calucted as:

Remaining Volume = Total volume - Used volume

Given that, total volume of hexane = 40 mL

Used volume of hexane = 5 mL

On putting values in above equation, we get

Remaining volume = 40 - 5 = 35 mL

Hence required value of remaining volume is 3 mL.

To know more about volume, visit the below link:

https://brainly.com/question/12410983

#SPJ4

Answer:

Chlorine exists as gaseous state while potassium chloride as a solid

Physical properties between the chlorine and potassium chloride are totally different because chlorine is available in gaseous form while potassium chloride available in solid form. ​

Potassium chloride crystals are composed of face-centered cubic (FCC) unit cells. KCl has a molar mass of 74.5513 grams/mol.

It has a density of 1.984 grams per cubic centimeter when it is solid and crystalline. Potassium chloride has melting and boiling temperatures of 1040 K and 1690 K.

A metal halide salt made of potassium and chlorine is known as potassium chloride. It appears as a white or colorless vitreous crystal and has no odor.

Thus, chlorine is present in gaseous state while ptassium chloride present in solid state.

To learn more about physical properties between the chlorine and potassium chloride follow the link below;

https://brainly.com/question/11293528

#SPJ2

Explanation:

Big C carbon surrounded by He helium

Answer:

Explanation:

The elements in Group I of the periodic table are called alkali metals. They are called alkali metals because they react with water to form alkali solutions. These metals are very reactive; hence they have to be stored under oil to protect them from corrosion by air and waterwaterwater

The group 1A elements, called alkali metals because they form alkalies on reacting with water. Alkalies are strong bases.

They are the metals that are soft, lustrous, and have a low melting point. Air and moisture react readily with alkali metals.

Special precautions must be taken when using and storing these metals due to their reactivity.

The seven alkali metals are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

Thus, the group 1A elements, called alkali metals because they form alkalies on reacting with water. Alkalies are strong bases.

Learn more about alkali metals

https://brainly.com/question/18153051

#SPJ4

Answer:

The aspirin is more soluble in ethanol than water - the water helps the crystals separate from solution.

Explanation:

Hope this helps!

In Ferromagnetism, materials are changed into permanent magnets.

Ferromagnetism is a process in which specific materials are turned into permanent magnets. The spins of electrons are shifted and electrons become more aligned and sequence with the direction of the field.

So we can conclude that in Ferromagnetism, materials are changed into permanent magnets.

Learn more about electron here: https://brainly.com/question/371590

Answer:

formula of concentration ion.

Answer:

H3CS06

Explanation:

A chemical supply company sells sulfuric acid (H3CS06) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 s…

Molarity is the ratio of a mole of the solute of the substance to the liter of solution. The volume of solution required to make 12.0 ml of 0.50 M solution is 1.5 mL.

Molar dilution is the calculation of the molarity or the volume of the unknown value from the known value. It is given as,

[tex]\rm M_{1}V_{1}= \rm M_{2}V_{2}[/tex]

Given,

Initial molarity = 4.00 M

Initial volume =?

Final molarity = 0.50 M

Final volume = 12.0 mL

Substituting values in the equation:

[tex]\begin{aligned} \rm V_{1} &= \rm \dfrac{\rm M_{2}V_{2}}{M_{1}}\\\\&= \dfrac{0.50 \times 12.0 }{4.00}\\\\&= 1.5 \;\rm ml\end{aligned}[/tex]

Therefore, 1.5 ml of 4.00 M sulfuric acid must be used to make 12 ml of 0.50 M solution.

Learn more about dilution and molarity here:

https://brainly.com/question/4218999

#SPJ4

From the calculations performed, the free energy change for the reaction is 72 kJ/mol.

The equilibrium constant is a value that shows the extent to which reactants have been converted to products.

Given that the equation of the reaction is;

3CH4(g)→C3H8(g)+2H2(g)

Then;

PC3H8 = 0.013 atm

PH2 =  2.3×10−2 atm

PCH4 = 41 atm

Now;

ΔG = ΔG° + RTlnQ

ΔG°reaction = ΔG°products - ΔG°reactants

ΔG°reaction = [( -23.4) +2(0)] - 3(-50.8)

ΔG°reaction = 129 kJ/mol

Q = PC3H8 * PH2^2/PCH4^3

Q = 0.013 * (2.3×10−2)^2/( 41)^3

Q = 6.877 * 10^-6/68921

Q= 9.9* 10^-11

Hence;

ΔG = 129 * 10^3  + [8.314 * 298 * (ln  9.9* 10^-11 )]

ΔG = 129 * 10^3 - 57073

ΔG = 72 kJ/mol

Learn more about free energy change: https://brainly.com/question/14143095

Answer:

[tex]\huge\boxed{\sf n = 7.36 \ mol}[/tex]

Explanation:

Given Data:

Volume = v = 42.19 L

Pressure = P = 428.792 kPa = 4.23 atm

Temperature = 27.871 °C + 273 = 300.871 K

R = the gas constant = 0.08206 L atm K⁻¹mol⁻¹

Required:

No. of moles = n = ?

Formula:

nRT = Pv

Solution:

Rearranging formula

[tex]\displaystyle n = \frac{Pv}{RT} \\\\n = \frac{(4.23)(42.19)}{(0.08206)(300.871)} \\\\n = \frac{181.467}{24.69} \\\\n = 7.36 \ mol\\\\\rule[225]{225}{2}[/tex]

Answer:

Enthalpy

Explanation:

The term entropy is used to express the particle scattering of a system.The term joule is a unit of energy.

Answer:

Bison were saved through the combined efforts of conservationists, scientists, ranchers and ultimately the general public. As their comeback continues, I believe that they can teach us how to be better stewards of the land and provide a future for the Plains where ecosystems and human cultures thrive.

Explanation:

[tex]watch.some.anime[/tex]

Answer:

Yes

Explanation:

The process of respiration and burning are similar in the following ways: Both respiration and burning require oxygen. Energy is released during both respiration and burning. The products produced (carbon dioxide and water) are the same for both respiration and burning.

Answer:

Yes

Both Respiration and Burning uses oxygen. Both Respiration and Burning produces energy. Both Respiration and Burning gives out carbon dioxide as the end product. The overall chemical reactions of both Respiration and Burning are the same.

Explanation:

Please mark me brainliest if correct

The mass of NiCl₂•6HO₂ needed to prepare a 0.035 M 500 mL solution of NiCl₂•6HO₂ is 4.165 g

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = Molarity × Volume

Mole of NiCl₂•6HO₂ = 0.035 × 0.5

Mole of NiCl₂•6HO₂ = 0.0175 mole

Mass = mole × molar mass

Mass of NiCl₂•6HO₂ = 0.0175 × 238

Mass of NiCl₂•6HO₂ = 4.165 g

Thus, 4.165 g of NiCl₂•6HO₂ is needed to prepare the solution

Learn more about molarity:

https://brainly.com/question/15370276

The grams of NiCl₂.6H₂O will be used to prepare a 0.0350M, 500ml of NiCl₂ solution is 2.268 grams.

Mass in grams of any substance will be calculated by using moles as:

n = W/M, where

W = given mass

M = molar mass

Moles from molarity will be calculated by using the below formula:

M = n/V, where

M = molarity of NiCl₂ solution = 0.0350M

V = volume of solution = 500mL = 0.5L

On putting values, we get

n = (0.035)(0.5) = 0.0175 mol

Now we convert these moles into grams by using the first formula as:
W = (0.0175mol)(129.6g/mol) = 2.268g

Hence required mass of NiCl₂.6H₂O is 2.268g.

To know more about moles & mass, visit the below link:
https://brainly.com/question/15374113

#SPJ4

Answer:

the ice cube feels cold  

Explanation:

heat transfer is like how the sun gives us and the radiation of it put heat transfer but we dont have radiation

Answer:

(CH₃COO)₂Ca(aq) + Na₂CO₃(aq) = 2CH₃COONa(aq) + CaCO₃(s)

2CH₃COO⁻ + Ca²⁺ + 2Na⁺ + CO₃²⁻ = 2CH₃COO⁻ + 2Na⁺ + CaCO₃

Ca²⁺ + CO₃²⁻ = CaCO₃

Answer: Q

=

−

53

,

796.6

J

Explanation is right here instead

The equation for heat is

Q

=

m

(

t

f

−

t

i

)

C

p

Q = heat in Joules

m = mass in grams

t

f

= final temp

t

i

= initial temp

C

p

= Specific Heat Capacity

For this problem

Q

=

?

?

?

m

=

275

g

t

f

=

38.4

o

C

t

i

=

85.2

o

C

C

p

=

4.18

j

g

o

C

Q

=

275

g

(

38.4

o

C

−

85.2

o

C

)

4.18

J

g

o

C

Q

=

275

g

(

−

46.8

o

C

)

)

4.18

J

g

o

C

Q

=

−

53

,

796.6

J

The negative Joule value means heat is being lost in an exothermic reaction.

Explanation:

Answer:

Molybdenum is M, Einsteinium is E, and N is Nitrogen. Lastly, S is sulfur.

The molar mass of Oz is 48 g/mol is true.

Molar mass of a substance is the mass of 1 mole of that substance or it is the number of grams per mole of a substance. The units for molar mass is grams/mole.

Therefore,The molar mass of Oz is 48 g/mol is correct because ozone have three oxygen and the molar mass of one oxygen is 16g/mol.

Ozone= 16×3

Ozone=48g/mol.

Learn more on molar mass here.

https://brainly.com/question/15299296

Answer:

D.) 4

Explanation:

Al + 3 O₂ --> 2 Al₂O₃

In the equation, there are:

Reactants: 1 Al and 6 O

Products: 4 Al and 6 O

To determine how many atoms there are of each, you multiply the coefficients by the subscripts attached to the atoms. While the question doesn't ask, as you can see, the oxygen atoms are balanced because there is an equal amount on both sides. To balance the aluminum atoms, you can get 4 aluminum atoms on the reactants side by using a coefficient of 4.

The new equation would look this this:

4 Al + 3 O₂ --> 2 Al₂O₃

There are now:

Reactants: 4 Al and 6 O

Products: 4 Al and 6 O

If 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

The molarity of a solution can be calculated using the following expression:

M1V1 = M2V2

Where;

25 × 0.80 = 40 × M2

20 = 40M2

M2 = 20/40

M2 = 0.5M

Therefore, if 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

Learn more about molarity at: https://brainly.com/question/12127540

ANSWER:

Physical chemistry is the branch of chemistry that deals with the physical structure of chemical compounds, the way they react with other matter and the bonds that hold their atoms together. An example of physical chemistry is nitric acid eating through wood.

The concentration of the final solution after mixing water into the H₂SO₄ is 0.375 M.

Concentration in terms of molarity will be calculated by using the below formula as:

M₁V₁ = M₂V₂, where

M₁ = molarity of H₂SO₄ = 1.50 M

V₁ = volume of H₂SO₄ = 50 mL

M₂ = molarity of water = ?

V₂ = volume of water = 200 mL

On putting all values on the above equation, we get

M₂ = (1.50)(50) / (200) = 0.375 M

Hence option (2) is correct.

To know more about molarity, visit the below link:

https://brainly.com/question/14469428