Water (H2O) forms when hydrogen gas (H2) and oxygen gas (O2) react according to the equation below: 2H2 O2 → 2H2O What mass of water forms when 1. 45 × 10-3 g O2 react completely? (Molar mass of O2 = 32. 00 g/mol; molar mass of H2O = 18. 02 g/mol) 1. 63 × 10-3 g 8. 16 × 10-4 g 1. 29 × 10-3 g.

So following this simple ratio, 4 moles of H2O2 will result in 2 moles of O2. For 1 mole of H2O2, it will yield to 0.5 moles of O2. Adding those up, 5 moles of H2O2 will yield to 2.5 moles of O2.

The mole concept is used here to determine the moles of oxygen produced from the decomposition of hydrogen peroxide. The moles of O₂ produced is 2.5.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The balanced equation for the decomposition of H₂O₂ is given as:

2H₂O₂ → O₂ + 2H₂O

Here the number of 'H' and 'O' atoms are equal on both sides.

The moles of oxygen produced from 5 mol of hydrogen peroxide is:

5 mol H₂O₂  × 1 mol O₂ / 2 mol H₂O₂ = 2.5 moles O₂

Thus the number of moles of O₂ produced from 5 mol of H₂O₂ is 2.5.

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Answer:

True

Explanation:

Hope This Helps

This problem is providing us with the reaction whereby tungsten is produced from tungsten (VI) oxide and hydrogen, so the percentage atom economy is required and found to be 64.3 % according to:

In the ambit of green chemistry, atom economy is one of the twelve principles of green chemistry, and tell us how efficient a chemical process is, in terms of the necessary reactants, versus the yielded products. In the ideal case, it is 100 % meaning that all the reactants lead to the desired product.

However, when byproducts are present, this percentage dwindles and the idea is to reason how convenient the process is. In this case, we can calculate the atom economy, by simply dividing the atomic mass of tungsten by the addition of the molar mass of tungsten (VI) oxide and three times that of waters:

[tex]\%A-E=\frac{183.84g/mol}{231.84g/mol+3*18.02g/mol} *100\%\\\\\%A-E=64.3\%[/tex]

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[tex]\rm -187.9 \;J/K[/tex]entropy of the reaction.

Entropy is the amount of heat or temperature inaccessible for the system to work and convert the chemical or thermal energy into mechanical energy.

Given,

The balanced reaction can be shown as,

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

The Gibbs free energy can be calculated as:

[tex]\rm \Delta G = \Delta H - \rm T\Delta S[/tex]

Here,[tex]\rm \Delta G[/tex] = gibbs free energy, [tex]\rm \Delta H[/tex] = change in enthalpy, T = temperature and [tex]\rm \Delta S[/tex] = change in entropy.

Substituting values in the equation:

[tex]\begin{aligned}\rm \Delta G &= -198400 \;\rm kJ -297 \times (-187.9\;\rm kJ/mol)\\\\\rm \Delta G &= -198400 + 55806.3\\\\\rm \Delta G &= - 142593.7 \;\rm kJ\end{aligned}[/tex]

Therefore, [tex]\rm -187.9 \;J/K[/tex] is the entropy [tex](\rm \Delta S)[/tex] of the reaction.

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Answer:

3.011 x 10^23 molecules of acetate

Explanation:

Answer:

3,924°F

Explanation:

here is the answer it is a little hard to explain but hopeing it helps you a lot

Answer:

The temperature would be 3,924 degrees Fahrenheit.

Explanation: Hope this helps<3

The answer to your problem is 0.015 liters. I got the answer because to convert cubic centimeters into liters, you need to divide the cubic centimeters by 1000.

Answer: oh i thought i knew it nvm im sorry love

Explanation:

A, the total number of valence electron is 24 for Silicon Tetrachloride , SiCl₄ .

In Lewis Dot structure S=N-A is used to calculate the total number of shared and unshared electrons in a molecule.

S is the number of shared electrons ,N is the number of total valence shell electrons required by all the atom of the molecule, A is the total number of valence electrons available from all the atoms in the molecule

For SiCl₄,

• We have to first count the valence electron on each atom that is coming to form a molecule .

Valence electron on Si = 4

Valence Electron on Cl = 7

Total valence electron on SiCl₄ = 4+ 4 * 7 = 32

• Then we find the least electronegative atom in the molecule and place it at the center , In SiCl₄ , Si has 1.8 and Cl has 3.16 and so Si is placed at the center and four Cl atoms are connected with a single bond

• A single bond takes up 2 valence electron and so for four bonds 8 valence electrons have been occupied , so we are left with 32-8=24 valence electrons.

Therefore In the Lewis Dot structure S=N-A , Total number of valence electrons available from all the atoms in molecule of SiCl₄ is 24.

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Answer:

Answer is B

Explanation:

Answer:

As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C .

You can determine how many grams of sodium chloride, commonly known as table salt, can be dissolved in

100 g

of water at

80

∘

C

by taking a look at its solubility graph.

A substance's solubility graph tells you how its solubility changes, let's say starting from room temperature, when temperature is either decreased or increased.

Answer:

7.28 moles Ag°

Explanation:

              Cu°          +    2 AgNO₃  => Cu(NO₃)₂ + 2Ag°

Given 7.28 moles     7.28 moles

To determine limiting reactant, divide the mole values by the respective coefficient of balanced equation. The resulting smallest value is the limiting reactant. Note: this is a short cut method for determining limiting reactant only. Once the limiting reactant is determined one must use the given mole values of the limiting reactant to solve problem. That is ...

Limiting reactant determination:

              Cu°          +    2 AgNO₃  => Cu(NO₃)₂ + 2Ag°

Cu: 7.28 / 1  = 7.28

AgNO₃ : 7.28 / 2 = 3.64 => Limiting Reactant is AgNO₃

Solving Problem depends on AgNO₃; Cu will be in excess.

Since coefficients of AgNO₃ & Ag° are equal, then the moles AgNO₃ used equals moles Ag° produced and is therefore 7.28 moles Ag°.

Answer:

21.32 L

Explanation:

First, convert grams to moles using molar mass. C has a mass of 12 and O has a mass of 16. CO2 will therefore have a mass of 28 g/mol. Divide 22 by 28 to get about 0.79 moles. Convert C to Kelvin by adding 273; getting 323K. Then use the ideal gas law (PV=nRT) to solve for V (V=nRT/P). This gets you 21.32 L, hope this helps!

Answer:

Option B

Explanation:

Use Avogadro constant of 6.02 x 10^23

For Option A,

1.9 moles x (6.02 x 10^23) = 1.1438 x 10^24

For Option B,

5.3 moles x (6.02 x 10^23) = 3.1906 x 10^24

For Option C,

9.5 moles x (6.02 x 10^23) = 5.719 x 10^24

For Option D,

19.2 moles x (6.02 x 10^23) = 1.1558 x 10^25

Therefore, the nearest one to 3.2 x 10^24 is Option B

The final temperature of the mixture is 28.93°C

Data;

The underlying principle of transfer of heat is discussed in heat transfer which can be summarized as heat lost by a warmer body is equal to heat gain by a colder body. The formula of this can be written as

[tex]Q=mc\delta \theta\\[/tex]

Heat Loss = Heat gain

[tex]m_1c_1(T_1-T_3)=m_2c_2(T_2-T_3)\\0.519*2.01*(105-T_3)=5.91*4.18*(16.7-T_3)\\109.53495-1.04319T_3=412.55346-24.7038T_3)\\1.04319T_3+24.7038T_3=412.55346-109.53495\\25.74699T_3=303.01851\\T_3=\frac{303.01851}{25.74699}\\T_3=11.77^0C[/tex]

The final temperature is equal to

[tex]T_f = \delta vap - T_3\\T_f = 40.7 - 11.77\\T_f = 28.93^0C[/tex]

The final temperature of the mixture is 28.93°C

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Answer:

It is true! Have a great day/night :). & make sure you drink water and eat!

Explanation:

Answer:

I dont know sorry i will try my best htough

Explanation:

Answer:

0.682L or 682mL

Use Charles Law of V1/T1 = V2/T2

V1 = 0.6L

T1 = 293K

V2=?

T2= 333K

Explanation:

?

Use a conversion factor to figure this out.

[tex]=99.47\ kPa[/tex] × [tex]\frac{1\ atm}{101.325\ kPa}[/tex]

= 0.9816925734 atm (round as you wish)

Answer:

Water vapor, carbon dioxide gas, heat, and light

Explanation:

I think this is right? :)

MY COMPUTER JUST FROZE SO I HAVE NO IDEA IF IM TYPING THE ANSWER

Explanation:

I THINK THE ANSWER WOULD BE OXYGEN AND LIGHT WOULD BE FORMED OFF OF THE CANDLE

Answer:

Explanation:Hydrogen peroxide

Explanation:

Hydrogen peroxide (

H

2

O

2

) is commonly used as a first aid antiseptic and decomposes naturally. They are usually kept in special containers to retain it's chemical properties, but if you poured some into a bowl you would see little gas bubbles rising up.

2

H

2

O

2

→ 2

H

2

O

+

O

2

Answer:

12 moles

Explanation:

1. Do comparison

From the equation, 1 mole of C3H8 yields 3 moles of CO2

Therefore, 4 moles of C3H8 should yield 12 moles of CO2

Steps:

Number of moles of CO2

= (1 mol x 4) x 3

= 12 moles

Answer:

982.5 kg/m³

Explanation:

When the temperature of a fluid increases, it dilates, and because of the variation of the volume, it's density will vary too. The density can be calculated by the expression:

ρ₁ = ρ₀/(1 + β*(t₁ - t₀))

Where ρ₁ is the final density, ρ₀ the initial density, β is the constant coefficient of volume expansion, t₁ the final temperature, and t₀ the initial temperature.

At t₀ = 4°C, the water desity is ρ₀ = 1,000 kg/m³. The value of the constant for water is β = 0.0002 m³/m³ °C, so, for t₁ = 93°C

ρ₁ = 1,000/(1 + 0.0002*(93 - 4))

ρ₁ = 1,000/(1+ 0.0178)

ρ₁ = 982.5 kg/m³

Answer:

groundwater pollution

Explanation:

Hope this solve your answer

Answer:

are cell which contain sulfuric acid while voltaic are cell which are dry.

Reactivity series:-

[tex]\setlength{\unitlength}{0.8 cm}\begin{picture}(20,15)\thicklines\put(5,9.5){\large {\boxed{ \sf{Reactivity \: series}}}}\put(0.8,8){\large\sf K \qquad\qquad\qquad Potassium\qquad\qquad\qquad \: maximum}\put(0.8,7.2){\large\sf Na \qquad\qquad\qquad Sodium\qquad\qquad\qquad\quad \: reactivity}\put(0.8,6.2){\large\sf Ca\qquad\qquad\qquad \: Calcium}\put(0.8,5.2){\large\sf Mg\qquad\qquad\quad \: Magnesium}\put(0.8,4.2){\large\sf Al\qquad\qquad\qquad \: Aluminium\qquad\qquad\qquad \: decreasing}\put(0.8,3.2){\large\sf Zn\qquad\qquad\quad\qquad \: Zinc\qquad\qquad\qquad\qquad \:reactivity}\put(0.8,2.2){\large\sf Fe\qquad\qquad\quad\qquad Ferrous}\put(0.8,1.2){\large\sf Pb\qquad\qquad\qquad \: \:\: Lead}\put(0.8,0.2){\large\sf H\qquad\qquad\qquad \: \:Hydrogen}\put(0.8, - 0.6){\large\sf Cu\qquad\qquad\qquad \: Copper}\put(0.8, - 1.5){\large\sf Hg\qquad\qquad\qquad \: Mercury}\put(0.8, - 2.5){\large\sf Ag\qquad\qquad\qquad \: \:Silver}\put(0.8, - 3.5){\large\sf Au\qquad\qquad\qquad \: \: Gold\qquad\qquad\qquad\quad \: \: minimum reactivity}\put(9.3,8.2){\vector(0, - 2){12}}\end{picture}[/tex]

#1

Ag is found as too less reactive so

#2

No element in universe can displace potassium (K) from its solution as it's most reactive .

#3

Fe is also a reactive metal.

So

#4

#5

#6

#7

#8

#9

#10

#11

As Ca is third most reactive metal

#12

the answer is a because the positive cations are attracted to the negative cathode. when the positive ions get to the cathode they pick up an electron and this produces normal sodium.