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3 years ago

7

for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction

1 answer:

sammy [17]3 years ago

8 0

Answer:

59.09%

Explanation:

13/22*100=59.09%

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The electron in a hydrogen atom, originally in level n = 8, undergoes a transition to a lower level by emitting a photon of wave

timofeeve [1]

Explanation:

It is given that,

The electron in a hydrogen atom, originally in level n = 8, undergoes a transition to a lower level by emitting a photon of wavelength 3745 nm. It means that,

$n_i=8$

$\lambda=3745\ nm$

The amount of energy change during the transition is given by :

$\Delta E=R_H[\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2}]$

And

$\dfrac{hc}{\lambda}=R_H[\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2}]$

Plugging all the values we get :

$\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{3745\times 10^{-9}}=2.179\times 10^{-18}[\dfrac{1}{n_f^2}-\dfrac{1}{8^2}]\\\\\dfrac{5.31\times 10^{-20}}{2.179\times 10^{-18}}=[\dfrac{1}{n_f^2}-\dfrac{1}{8^2}]\\\\0.0243=[\dfrac{1}{n_f^2}-\dfrac{1}{64}]\\\\0.0243+\dfrac{1}{64}=\dfrac{1}{n_f^2}\\\\0.039925=\dfrac{1}{n_f^2}\\\\n_f^2=25\\\\n_f=5$

So, the final level of the electron is 5.

4 0

3 years ago

Determine the enthalpy for the reaction A+B --> C If we know the following:

PolarNik [594]

Explanation:

here is the answer to the question

7 0

3 years ago

Describe a procedure to separate a mixture of sugar black pepper and pebbles

slamgirl [31]

Put the mixture in water, the pebbles will sink, the pepper will float, and the sugar will dissolve

7 0

4 years ago

2C4H10+13O2-->8CO2+10H2O Using the predicted and balanced equation, How many Liters of CO2 can be produced from 150 grams of

Anna11 [10]

Answer: 233 L of $CO_2$ will be produced from 150 grams of $C_4H_{10}$

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$ $\text{Moles of} C_4H_{10}=\frac{150g}{58g/mol}=2.59moles$

The balanced chemical equation is:

$2C_4H_{10}+13O_2(g)\rightarrow 8CO_2+10H_2O$

According to stoichiometry :

2 moles of $C_4H_{10}$ produce = 8 moles of $CO_2$

Thus 2.59 moles of $C_4H_{10}$ will produce= $\frac{8}{2}\times 2.59=10.4moles$ of $CO_2$

Volume of $CO_2=moles\times {\text {Molar volume}}=10.4moles\times 22.4mol/L=233L$

Thus 233 L of $CO_2$ will be produced from 150 grams of $C_4H_{10}$

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3 years ago

In a saturated fatty acid, every carbon atom is saturated with __________.

marta [7]

Carbon atoms are saturated with (surrounded by) Hydrogen atoms

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3 years ago