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3 years ago

In Balancing Equations, why do I put a 3 before reactant H?

Chemistry

1 answer:

Katena32 [7]3 years ago

5 0

You have 3 (h2(so4)) on the reactants side so you need to have 6 total hydrogen’s on the products side. Therefore 3(h2) is required.

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For the reaction represented by the equation 1SO3 1H2O -> 1H2SO4, calculate the percentage yield if 500. g of sulfur trioxide

Lyrx [107]

Answer:

The answer to the question is

The percentage yield when 500. g of SO₃ react with excess water to produce 575 g of H₂SO₄ is 81.63 %

Explanation:

The known variables are

Mass of SO₃ = 500 g

Mass of H₂SO₄ = 575 g

Molar mass of SO₃ = 80.0632 g/mol

Molar mass of H₂SO₄ = 98.079 g/mol

The reaction equation is

SO₃ +H₂O → H₂SO₄

One mole of SO₃ react with one mole of H₂O to produce one mole of H₂SO₄

Therefore number of moles of SO₃ in 500 g sample of SO₃ = (500 g)/(80.0632 g/mol) = 6.25 moles

Also number of moles of H₂SO₄ in 575 g sample of H₂SO₄ = (575 g)/(98.079 g/mol) = 5.86 moles

Which shows that the reaction is in the forward direction, production of H₂SO₄

Therefore 6.25 moles of SO₃ can produce 6.25 moles of H₂SO₄ and

The mass of 6.25 moles of H₂SO₄ = 6.25 moles × 98.079 g/mol = 612.51 g

Theoretical Yield = 612.51 g

Percentage Yield = $\frac{Actual Yield}{Theoretical Yield} *100$ = $\frac{500}{612.51}*100$

Percentage Yield = 81.63 %

6 0

3 years ago

An isotonic solution has: a)The same pH as blood b) More ions per unit volume than blood c) More water per unit volume than blo

Veronika [31]

Answer:

d) osmotic pressure equal to that of blood

Explanation:

Answer is not a) because pH is concentration of positive hydrogen in solution but it not note all solutes. Answer is not b) because like answer a), it not note solutes without charge and, additionally it not note the pressure equilibrium when solvent flows through a membrane . Answer is not c) because it can be more or less water (solvent).

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3 years ago

How is a magnetic field produced?

Kipish [7]

Answer:

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.

6 0

3 years ago

What internal structure do a zebra and a lion share?<br> Claws<br> Backbone<br> Hooves<br> Hair

alexandr402 [8]

Answer:

BACKBONEEEE

Explanation:

3 0

3 years ago

Read 2 more answers

An air-filled balloon has a volume of 225 L at 0.940 atm and 25 °C. Soon after, the pressure changes to 0.990 atm and the temper

lorasvet [3.4K]

Answer:

The right choice is V₂ = 195.7 L

Explanation:

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V: is the volume of the gas in L.

n: is the no. of moles of the gas in mol.

R: is the general gas constant,

T: is the temperature of the gas in K.

If n is constant, and have different values of P, V and T:

(P₁*V₁) / T₁ = (P₂ * V₂) / T₂

Knowing that:

V₁ = 225 L , P₁ = 0.940 atm

T₁ = 25 °C + 273 = 298 K

V₂ = ??? L, P₂ = 0.990 atm

T₂ = 0 °C + 273 = 273 K

applying in the above equation

(P ₁* V₁) / T₁ = (P₂ * V₂) / T₂

(0.940 atm * 225 L) / 298 K= (0.990 atm * V₂) / 273 K

V₂ = (0.940 atm * 225 L * 273 K) / (298 K * 0.990 atm)

V₂ = 195.7 L

So, the right choice is:

V₂ = 195.7 L

7 0

3 years ago