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Sphinxa [80]
3 years ago
7

A chemist analyzes two samples. One sample contains 14g of element x and 6.0 g of element y. The second sample contains 28 g of

element x and samples are the same substance
Chemistry
1 answer:
inn [45]3 years ago
7 0

Answer:

Explanation:

Here's the complete question:

A chemist analyzes two samples.One sample contains 14g of element x and 6.0g of element y.The second sample contains 28g of element x and 6.0g of element y. Does it appear that the two samples are the same substance?

The two samples that we are given in the question are different. They are not the same thing because we can deduce that their components ratio are different.

Sample One contains 14g of element x and 6.0g of element y. The ratio of element x to y is 14/6 = 7/3 = 7:3.

Sample Two contains 28g of element x and 6.0g of element y. The ratio of element x to y is 28/6 = 14/3 = 14:3.

Therefore, they have different ratio for their components and are therefore not thesame.

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At elevated temperatures, sodium chlorate decomposes to produce sodium chloride and oxygen gas. A 0.8765-g sample of impure sodi
barxatty [35]

Answer:

z = 18,46%

Explanation:

First we need to discover the mole number of the O2 produced so we use PV=nRT

734 torr * 57.2*10^-3 L = n 62.3637 * 295.15 K

n = \frac{734 * 57.2*10^-3}{62.3637 * 295.15}

n = \frac{41,98}{18.406}

n = 2,28 * 10^-3 mole

The reaction to the decomposition is:

2 NaClO3 --> 2 NaCl + 3 O2

2 mole NaClO3 - 3 moles O2

x - 2,28*10^-3 moles O2

X= 1,52*10^-3 moles of NaClO3

1 moles of NaClO3 - 106,44 g

1,52*10^-3 moles of NaClO3 - y

y = 0,1617 g

0,8765 g - 100%

0,1617 g - z

z = 18,46%

8 0
3 years ago
Identifica el elemento según su configuración electrónica, 1s2 2s2 2p6 3s2 3p6 4s2 3d8 *
Marysya12 [62]

Answer:

nickel is the correct answer

4 0
3 years ago
Calculate the wavelength for the transition from n = 4 to n = 2, and state the name given to the spectroscopic series to which t
finlep [7]

Answer:

The wavelength for the transition from n = 4 to n = 2 is<u> 486nm</u> and the name  name given to the spectroscopic series belongs to <u>The Balmer series.</u>

Explanation

lets calculate -

Rydberg equation-   \frac{1}{\pi } =R(\frac{1}{n_1^2} -\frac{1}{n_2^2})

where ,\pi is wavelength , R is Rydberg constant ( 1.097\times10^7), n_1 and n_2are the quantum numbers of the energy levels. (where n_1=2 , n_2=4)

Now putting the given values in the equation,

                \frac{1}{\pi }=1.097\times10^7\times(\frac{1}{2^2} -\frac{1}{4^2} )=2056875m^-^1

    Wavelength \pi =\frac{1}{2056875}

             =4.86\times10^-^7 = 486nm

<u>    Therefore , the wavelength is 486nm and it belongs to The Balmer series.</u>

8 0
3 years ago
In a solution of a carbonated beverage, what is the dissolved carbon dioxide?
insens350 [35]

Answer:

D.

Explanation:

D is the correct answer because, in aqueous solution, solvent is water and solute (in this example carbon dioxide CO₂) is a substance dissolved in water. The amount of solute that can be dissolved in a solvent depends of chemical composition, temperature and pressure

4 0
3 years ago
Read 2 more answers
A 748 L hot air balloon sits on a table at 26.7oC. If the balloon is heated to 48.3oC, what is the new volume?
Naddik [55]

The new volume of the hot air balloon is 801.9L.

As the temperature of the hot air balloon on the table is increased, the its volume also increases.

<h3>Charle's law</h3>

Charle's law states that the volume of an ideal gas is directly proportional to the absolute temperature provided pressure is kept at constant.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

  • Initial volume V₁ = 748L
  • Initial temperature T₁ = 26.7°C = 299.85K
  • Final temperature T₂ = 48.3°C = 321.45K
  • Final volume V₂ = ?

To calculate the new volume we subtsitute our given values into the expression above.

V₁T₂ = V₂T₁

V₂ = V₁T₂ / T₁

V₂ = ( 748L × 321.45K ) / 299.85K

V₂ = 240444.6LK / 299.85K

V₂ = 801.9L

The new volume of the hot air balloon is 801.9L.

As the temperature of the hot air balloon on the table is increased, the its volume also increases.

Learn more about Charle's law here: brainly.com/question/21184611

3 0
2 years ago
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