Some chemical factories make hydrogen gas (H2) using a process called steam methane reforming. In this process, methane (CH4) combines with steam (H2O) at high temperatures to form a mixture of hydrogen gas and carbon monoxide (CO). This mixture can then be used to make substances like hydrogen fuel and ammonia

Answer:

300 mL

Explanation:

the unit formula of calcium phosphate is Ca3(PO4)2

molar mass of Ca3(PO4)2 = (3×40 + 2×31 + 8×16) g/mol = 310 g/mol

n = m/M = 35 g/(310 g/mol)

c = n/V

V = n/c = [35 g/(310 g/mol)]/0.375 mol/L

V = 0.30 L = 300 mL

100.6 F is around 38.1 C!

Answer:

C

Explanation:

Answer:

Which phrase best describes wave motion? Movement of energy through space or a medium.

Explanation:

Answer option A.

D melting ice cream because if u know what a physical change is its a change that you can reverse chimical change are changes you cant reverse so u can freeze back ice cream so :D

Answer:

okkkkk

Explanation:

the balanced equation is

2NaBr +Cl2 =2NaCl + Br2

can you mark me as a brainliest

Answer:

Probably around 6 because the ph of hydrochloric acid is 3

Explanation:

Explanation:

Your chemical equation should look like this:

Li3PO4 + AlF3 --> 3LiF + AlPO4

This is the balanced equation for a double-displacement reaction

Answer:

212.5 mL

both the original and the diluted solution have 0.765 moles of KCl

Explanation:

c1V1 = c2V2

V2 = c1V1/c2 = (1.8 M×425 mL)/1.2 M = 637.5 mL

(637.5 - 425) mL = 212.5 mL

n = (1.8 mol/L)(0.425 L) = 0.765 moles of KCl

since it's a dilution, the diluted solution has the same number of moles as the original solution, 0.765 moles of KCl

Answer:

48 mph

Explanation:

divide time by distance - 20/25 = .8 miles per minute, multiple by 60 to get mph

Answer:

the required temperature of uranium hexafluoride is 54156.25 K

Explanation:

Given the data in the question;

We know that average speed is;

u = [tex][ 3RT / MM ]^{1/2[/tex] ----------- let this be equation 1

where MM is the molar mass

T is temperature

R is universal gas constant and u is the average speed.

First we get the average speed of H₂

[tex]U_{H}[/tex]₂ =  [tex][ 3RT_H_2 / MM_H_2 ]^{1/2[/tex] ------ let this be equation 2

Next is the average speed of UF₆

[tex]U_{UF[/tex]₆ = [tex][ 3RT_{UF_6} / MM_{UF_6} ]^{1/2[/tex] ------ let this be equation 3

given that; both have the same average speed, equation 2 = equation 3;

[tex][ 3RT_H_2 / MM_H_2 ]^{1/2[/tex] = [tex][ 3RT_{UF_6} / MM_{UF_6} ]^{1/2[/tex]

we multiply both sides by 1/3R and also square both sides.

[tex][ T_H_2 / MM_H_2 ][/tex] = [tex][ T_{UF_6} / MM_{UF_6} ][/tex]

given that; temperature of hydrogen T[tex]_{H[/tex]₂ = 37°C = ( 37 + 273.15)K = 310.15 K

we know that Molar mass of H₂; MM[tex]_{H[/tex]₂ = 2.016 g/mol  

and molar mass of  UF₆; MM[tex]_{UF[/tex]₆ = 352.02 g/mol

so we substitute

[ 310.15 K / 2.016 g/mol  ] = [ T[tex]_{UF[/tex]₆ / 352.02 g/mol ]

T[tex]_{UF[/tex]₆ = [ 352.02 g/mol  × 310.15 K ] / 2.016 g/mol

T[tex]_{UF[/tex]₆ = 109179.003 K/ 2.016

T[tex]_{UF[/tex]₆ = 54156.25 K

Therefore, the required temperature of uranium hexafluoride is 54156.25 K

Answer:

The astenosphere is located below the lithosphere

The mantle is composed of silicate material

Explanation:

The Earth has several different layers, and they can be presented in two different manners, depending on their chemical composition and their physical properties. According to the chemical composition the Earth has three layers, crust, mantle, and core, while in accordance to the physical properties it has five, lithosphere, astenosphere, mesosphere, outer core, and inner core.

The astenosphere is the second layer from the top, and it lies just below the lithosphere. It is also the upper part of the mantle. The mantle is a layer that is largely composed of silicate material, mostly silicate molten rock. It can easily be seen from the volcanic activities that this layer is composed of silicate material because the magma is rich in it, and the magma comes from this layer.

Answer:

80L

Explanation:

V1/T1 = V2/T2

V2 = V1 T2/T1

T1 = 300K

V1 = 60L

T2 = 400K

V2 = ?

V2 = V1 T2/T1

V2 = (60L)(400K) / (300K)

V2 = 80L

Electromagnetic radiation is reflected or absorbed mainly by several gases in the Earth's atmosphere, among the most important being water vapor, carbon dioxide, and ozone. Some radiation, such as visible light, largely passes (is transmitted) through the atmosphere.

Answer:

O titanium, Ti

Explanation:

Answer:increase In kinetic energy of molecules

Explanation:increase in kinetic energy of molecules

When there is an increase in temperature of a gas in an enclosed container, the pressure will also increase due to the increase in the kinetic energy.

Temperature and pressure of gas is directly proportional to each other.

When the temperature of the gas increases, then the kinetic energy of the gas molecules are also increases. Due to increase in the velocity of gas molecules they will collide with each other as a result of which pressure of the gas is aslo increases.

Hence due to increase in kinetic energy, pressure increases.

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Answer:

Very true

Explanation:

Answer:

4.9 L O₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify variables

[Given] 6.4 g O₂ at STP

[Solve] L O₂

Step 2: Identify Conversions

[STP] 1 mol = 22.4 L

[PT] Molar Mass of O: 16.00 g/mol

Molar Mass of O₂: 2(16.00) = 32.00 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

4.48 L O₂ ≈ 4.9 L O₂

Answer:

[tex]Al_2(SO_4)_3+3Mg(NO_3)_2\rightarrow 2Al(NO_3)_3+3MgSO_4[/tex]

Explanation:

Hello there!

In this case, for the given reactants side, we infer this is a double replacement reaction because all the cations and anions are switched around as a result of the chemical change, we infer that the products side include aluminum with nitrate and magnesium with sulfate as shown below:

[tex]Al_2(SO_4)_3+Mg(NO_3)_2\rightarrow Al(NO_3)_3+MgSO_4[/tex]

However, we need to balance since unequal number of atoms are present at both sides, thus, we do that as shown below:

[tex]Al_2(SO_4)_3+3Mg(NO_3)_2\rightarrow 2Al(NO_3)_3+3MgSO_4[/tex]

Thus, we make 6 Al atoms, 3 S atoms, 3 Mg atoms and 30 O atoms on each side in agreement with the law of conservation of mass.

Regards!

Answer: The value of equilibrium constant, K, is [tex]7.74 \times 10^{-4}[/tex].

Explanation:

The reaction equation is as follows.

[tex]2SO_{3}(g) \rightleftharpoons 2SO_{2}(g) + O_{2}(g)[/tex]

Now, the expression for equilibrium constant of this reaction is as follows.

[tex]K = \frac{[SO_{2}]^{2}[O_{2}]}{[SO_{3}]^{2}}[/tex]

Substitute the given values into above expression as follows.

[tex]K = \frac{[SO_{2}]^{2}[O_{2}]}{[SO_{3}]^{2}}\\= \frac{(\frac{0.210}{15.4})^{2} \times (\frac{0.354}{15.4})}{(\frac{8.51 \times 10^{-2}}{15.4})}\\= 7.74 \times 10^{-4}[/tex]

Thus, we can conclude that the value of equilibrium constant, K, is [tex]7.74 \times 10^{-4}[/tex].

Answer:

2,981g

Explanation:

Firstly, we need to find the number of moles of MgCl that we have by using the formula: mass = No. Moles x Molar Mass, which we can rearrange so that we are solving for no. moles:

No. Moles = mass / Molar Mass

We are given a mass of 621g, and we can calculate the molar mass of MgCl by adding the two molar masses together: 24.31+35.45 = 59.76

Now we can calculate number of moles by substituting these values into the formula:

n = 621 / 59.76

No. moles = 10.4

Now we can use the co-efficients in the formula to tell us how many moles of AgCl will be formed. The coefficient of MgCl is 1, and the coefficient of AgCl is 2. This means that every 1 mol of MgCl will form 2 moles of AgCl. So, to find the no. moles of AgCl, we multiply our no. moles by 2:

10.4 x 2 = 20.8 moles

Finally we convert this back into mass by multiplying the no. moles by the Molar mass of AgCl:

m = 20.8 x (107.87+35.45)

m = 2,981g

Answer:

See Explanation

Explanation:

Let us closely consider the electronic configuration of manganese atom, Manganese II ion and manganese III ion. This will give a clue of the answer.

Manganese: [Ar] 3d5 4s2

Manganese II: [Ar] 3d5

Manganese III: [Ar] 3d4

Now, let us remember that the d orbital contains a maximum of ten electrons. Hence, the electronic configuration of Mn^2+, [Ar] 3d5 reflects a half filled d- orbital which is known to be unusually stable(half-filled orbitals are known to possess unusual stability just as fully filled orbitals do).

The same can not be said about Mn^3+. Hence, Mn^2+ is more stable than Mn^3+.

Answer:

A

Explanation:

because

O2 : H2O

11 : 8

hope this helps:)

The mole to mole ratio of oxygen to water for the chemical equation given is 11:8.

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.

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Explanation:

One atom of carbon (2.4) combines with two atoms of oxygen (2.6) to form the compound carbon dioxide CO2 (only the outer shell of carbon's electrons are shown). ... The carbon dioxide molecule is held together by the strong C=O. carbon–oxygen double covalent bonds by sharing electrons.

H2SO4 (aq) + CaCO3(s) → H2O(l)+ CO2(g)+ CaSO4(s)

it is balanced

:it is doubled displacement reaction.

Answer:

bAlanced

Explanation:

Answer:

3M

Explanation:

moles ÷ liters = molarity

4.8 ÷ 1.6 = 3M

Answer:

Limiting Reagent = Aluminum

Mass formed = 28.92g (4.s.f.)

Explanation:

Step 1: Write a balanced equation for the reaction

We know that Aluminum hydride is formed from hydrogen and aluminum, so we can put those elements in our equation first:

H2 + Al -> AlH3

*Remember that hydrogen is a diatomic molecule so it is H2.

Now let's balance it! We can see that the Al molecules are balanced but the Hydrogens are not, so we can multiply both molecules by the opposite number:

3H2 + Al -> 2AlH3

Now we have 6 hydrogens on each side, we just add a 2 to balance the aluminum and we have the balanced equation!

3H2 + 2Al -> 2AlH3

Step 2: Convert all values to no. of moles

To do this, we can use the formula:

mass = no. moles x Molar mass

Which we can rearrange to find No. moles = mass/ Molar mass

Hydrogen: 3.00/2.02 = 1.49 moles

Aluminum: 26.00/26.98 = 0.9637 moles

Step 3: Find the Limiting Reagent

Now we choose one (let's use hydrogen) and divide by the co-efficient ratio between the two elements (3H2 for every 2 Al).

1.49 x 2/3 = 0.993 (This is the theoretical amount of Aluminum we need for the amount of hydrogen we have)

Now we compare this number with the actual no. moles of aluminum we have to find the limiting reagent:

0.993 > 0.9637

This means that Aluminum is the limiting reagent. (We are working with 0.9637 moles of Aluminum.)

Step 4: Find amount of product formed

We can use the molar ratio of the balanced equation again to find how much AlH3 is made. The coefficient of Al is the same as the coefficient of AlH3. This means that equal no. if moles are made in the reaction.

This means that 0.9637 moles of Aluminum Hydride is formed in this reaction.

Step 5: Convert back to mass in grams

Now we just need to convert the no. moles back to mass using the same formula:

mass = no. moles x Molar Mass

m = 0.9637 x (26.98 + 3 x 1.01)

m = 0.9637 x 30.01

m = 28.92g (4.s.f.)

Hope this helped!

Answer:

"3. Energy can either be destroyed or created. Its goes from one form to another."  

Explanation:

The third answer choice, "3. Energy can either be destroyed or created. Its goes from one form to another. " is related to the Law of Conservation of Energy from thermodynamics. Is it not a postulate of the Kinetic Molecular Theory.

"1. Average Kinetic Energy of the system is a measure of the temperature of the system."

Postulate of Kinetic Molecular Theory [tex]\checkmark[/tex]

"2. Energy is conserved in the collisions between gas molecules.."

Postulate of Kinetic Molecular Theory [tex]\checkmark[/tex]

"3. Energy can either be destroyed or created. Its goes from one form to another.

[tex]\times[/tex] NOT a Postulate of Kinetic Molecular Theory

"4. Gases travel in straight line until they collide with other gas molecules"

Postulate of Kinetic Molecular Theory [tex]\checkmark[/tex]