What is the molar mass of Fe(NO3)2?

Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly. When exposed to ultraviolet

igomit [66]

Answer:

1. Yes

2. After 68.1 mins, pX < pY.

Explanation:

Assuming the total gas pressure is 1 atm, let the partial pressure of Y be y, partial pressure of X will be 0.25y + y = 1.25y

1.25y + y = 1atm

2.25y = 1 atm

y = 1 atm / 2.25 = 0.44 atm

Then partial pressure of X = 0.56 atm

The partial pressure of a gas in a mixture of gases is directly proportional to the mole fraction of the gas.

Therefore the mole fraction of X and Y is 0.56 and 0.44 respectively.

The partial pressures of X and Y becomes half of their original values at 1.25 h = 85 min and Y at 150 min respectively.

The partial pressure after some time can be calculated from the half-life equation :

m = m⁰ * 1/2ⁿ

Where m = the remaining mass, m⁰ = initial mass, and n is number of half-lives undergone.

Let partial pressures represent the mass, and n for X and Y be a and b respectively:

pX = 0.56/2ᵃ

pY = 0.44/2ᵇ

We then determine when Partial pressure of X, pX = Partial pressure of Y, pY

0.56/2ᵃ = 0.44/2ᵇ

2ᵃ/2ᵇ = 0.56/0.44

2ᵃ/2ᵇ = 1.27

2ᵃ⁻ᵇ = 2⁰°³⁴⁵

a - b = 0.345

Let this time be t, therefore,

For X; t = 85a and For Y: t = 150b

85a = 150b

then, a = 1.76b

1.76b - b = 0.345

0.760b = 0.345

b = 0.454 and,

a = 0.345 + 0.454 = 0.799

So, X goes through 0.779 half-lives while Y goes through 0.454 half-lives Then, the time for both X and Y to have the same amount is:

t = 150 * 0.454 = 68.1 min

After 68.1 mins, pX < pY.

5 0

3 years ago

When heating liquid materials in laboratory glassware, a student should always

Lelechka [254]

Answer:

be careful to not hurt yourself

5 0

3 years ago

Read 2 more answers

If the concentration of h uons were to decrease what would happen to the oh ions

stich3 [128]

<span>If the concentration of H⁺ ions will decrease then the concentration of OH⁺ ions will increase.</span>

3 0

4 years ago

Iron is extracted from iron oxide in the Blast Furnace: Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2

arsen [322]

a. mass of iron = 69.92 g

b. percent yield = 93%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

a.

Reaction

Fe₂O₃+3CO⇒2Fe+3CO₂

MW Fe₂O₃ : 159.69 g/mol

mol Fe₂O₃

$\tt \dfrac{100}{159,69}=0.626$

mol Fe₂O₃ : mol Fe = 1 : 2

mol Fe :

$\tt \dfrac{2}{1}\times 0.626=1.252$

mass of Fe(Ar=55.845 g/mol) :

$\tt 1.252\times 55.845=69.92~g$

b.

actual yield = 65 g

theoretical yield = 69.92 g

percent yield :

$\tt =\dfrac{65}{69.92}=0.93=93\%$

8 0

3 years ago

Determine how many formula units are in 2.35 moles of lithium phosphite?

Stells [14]

Answer:

Determine how many formula units are in 2.35 moles of lithium phosphite?

Explanation:

After reading the sources provided write a 250 word summary on the contributions of West Virginians to the war effort.What are the dimensions of the product? 2 6 4 1 -3 0 x -3 -2 -8 2 3 5 1 x 2 2 x 2 3 x 2 3 x 3Can somebody help me with this pleaseDetermine how many formula units are in 2.35 moles of lithium phosphite?Can someone help? It's due todayWhat main idea links all three of the article excerpts contained in th passage together? A) Taxation rates should be applied equally and fairly to all people. B A little bit of kindness goes a long way in trying to change the world. C) No one deserves to be lonely, and everyone deserves to be loved. D African-Americans had to fight long and hard to receive equal rights in America.Can somebody help me with this pleaseCan somebody help me with this pleaseAfter reading the sources provided write a 250 word summary on the contributions of West Virginians to the war effort.

4 0

3 years ago