All categories

3 years ago

Answer the 2 following questions: (ill give brainlist to someone)

Chemistry

1 answer:

julsineya [31]3 years ago

7 0

Answer:

I think that both have the same mass

Explanation:

PLEASE MARK ME AS BRAINLIEST THANK YOU

You might be interested in

What happens to the reactivity of nonmetals within a group from top of the group to the bottom?

andreev551 [17]

As you go down a group, the atoms get bigger. The bigger the atom, the more unstable it is. The more unstable it is, the more reactive the atom will be. So, as you go down a group, the nonmetals will become more reactive.

6 0

4 years ago

A compound has the following percentages by mass: barium, 58.8%; sulfur, 13.74%; oxygen, 27.43%. Determine the empirical formula

lys-0071 [83]

Answer:

BaSO₄

Explanation:

Let's assume we have 100 g of the compound. If that's the case we would have:

58.8 g of Ba

13.74 g of S

27.43 g of O

Now we convert the masses of each element into moles, using their respective molar masses:

58.8 g Ba ÷ 137.327 g/mol = 0.428 mol Ba

13.74 g S ÷ 32 g/mol = 0.429 mol S

27.43 g O ÷ 16 g/mol = 1.71 mol O

We divide those moles by the lowest number among them:

0.428 mol Ba / 0.428 = 1

0.429 mol S / 0.428 ≈ 1

1.71 mol O / 0.428 = 4

We can express those results as Ba₁S₁O₄, meaning the empirical formula is thus BaSO₄.

5 0

3 years ago

Which of the following statement is true?

Svetradugi [14.3K]

Answer:

a. The resonance effect of the hydroxyl group stabilizes the anionic intermediate

Explanation:

The resonance effect stabilizes the the charge through the delocalization of the pi bonds. The resonance stabilization mainly occurs in the conjugated pi systems.

For example, phenol forms a strong hydrogen bonds than the nonaromatic alcohols as the $O_2-H_2$ dipole present in the hydroxyl group is being stabilized by the presence of the aromatic ring of phenol.

Thus the resonance effect of the hydroxyl group stabilizes the anionic intermediate.

4 0

3 years ago

g A hydrogen atom initially in the n = 4 states emits a photon and makes a transition to the n = 2 level. What is the wavelength

Vinil7 [7]

Answer: The wavelength of the photon is 486.2 nm and it lies in the visible region

Explanation:

To calculate the wavelength of light, we use Rydberg's Equation:

$\frac{1}{\lambda}=R_H\left(\frac{1}{n_i^2}-\frac{1}{n_f^2} \right )$

Where,

$\lambda$ = Wavelength of radiation

$R_H$ = Rydberg's Constant = $1.097\times 10^7m^{-1}$

$n_f$ = Higher energy level = 4

$n_i$ = Lower energy level = 2

Putting the values in above equation, we get:

$\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{2^2}-\frac{1}{4^2} \right )\\\\\lambda =4.862\times 10^{-7}m$

Converting this into nanometers, we use the conversion factor:

$1m=10^9nm$

So, $4.862\times 10^{-7}m\times (\frac{10^9nm}{1m})=486.2nm$

As, the range of wavelength of visible light is 400 nm - 700 nm. So, the wavelength of the given photon lies in the visible region

Hence, the wavelength of the photon is 486.2 nm and it lies in the visible region

6 0

3 years ago

Describe how kinetic energy is related to temperature.

Tasya [4]

Temperature is the average kinetic energy of the particles of matter. the hotter something is the more kinetic energy it has. ... temperature heats up the particles they have more kinetic energy and move and bounce into each other and spread out.

6 0

3 years ago