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3 years ago

A closed system is:

1 answer:

3 0

A closed system is completely closed to the outside environment. Every interaction is transmitted inside that closed system.

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Using the Rydberg equation, calculate the energy for the following electronic transitions in a hydrogen atom and label each as a

Murljashka [212]

Answer:

-1.94 * 10^-18 J

Since the electron moved from a higher to a lower energy level (n = 3 → n = 1) it is an emission.

Explanation:

From Rydberg equation;

E = -RH(1/n^2final - 1/n^2initial)

For a transition from n = 3 → n = 1

RH = 2.18 * 10^-18 J

E = -(2.18 * 10^-18) (1/1^2 - (1/3^2)

E = -(2.18 * 10^-18) (1-1/9)

E= -(2.18 * 10^-18) (8/9)

E = -1.94 * 10^-18 J

7 0

2 years ago

N methyl 2 pyrrolidone heated with aqueous acid reaction

monitta

N-methyl 2 pyrrolidone is a cyclic amide and it when heated with aqueous acid gives the product as a cyclic amino acid. The product name is N-Methyl-4-aminobutyric acid

The reaction is given as follows in the attached picture.

5 0

2 years ago

About 6 × 109 g of gold is thought to be dissolved in the oceans of the world. If the total volume of the oceans is 1.5 × 1021 L

Lelechka [254]

First, determine the number of moles of gold.

Number of moles = $\frac{given mass in g}{molar mass}$

Given mass of gold = $6 \times 10^{9} g$

Molar mass of gold = 196.97 g/mol

Put the values,

Number of moles of gold = $\frac{6 \times 10^{9} g}{196.97 g/mol}$

= $0.03046\times 10^{9} mole$ or $3.046\times 10^{7} moles$

Now, molarity = $\frac{moles of solute}{volume of the solution in liters}$

Put the values, volume of ocean = $1.5 \times 10^{21} L$

Molarity = $\frac{3.046\times 10^{7} moles}{1.5 \times 10^{21} L}$

= $2.03\times 10^{-14} M$

Thus, average molar concentration = $2.03\times 10^{-14} M$

6 0

2 years ago

if during the interaction of 36.5 g of hydrochloric acid with magnesium 137 kg of joules energy are released, how much energy wo

svetoff [14.1K]

Explanation:

ANSWER

The molarity =

molecularweight

density×purity×10

36.5

1.18×36.5×10

=11.8molar

7 0

2 years ago

I need an analysis and conclusion, for the lab, Types of reactions

Leya [2.2K]

Answer:

Explanation:

I am a bit confused is there instuctions on what to write on or anything like that

3 0

2 years ago