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bulgar [2K]
3 years ago
13

According to Bohr atomic model

Chemistry
1 answer:
nata0808 [166]3 years ago
7 0

Answer:

A small positively charged nucleus surrounded by revolving negatively charged electrons in fixed orbits

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9. Which of the following accurately describes the orbits of the planets in the solar system?
lana [24]

Answer:

the awnser is B

Explanation:

the awnser is B

7 0
2 years ago
The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
Paul [167]

Answer:

Option B. +3 and +6

Explanation:

<em>Zeff</em> = <em>z - s</em>

where <em>z</em> is the atomic number, <em>s</em> is the number of shielding(non-valence) electrons

For Boron, electronic configuration is 1s²2s³.

z = 5, s = 2

Zeff = 5 - 2 = +3

For Oxygen, electronic configuration is 1s²2s²2p⁴

z = 8, s = 2

Zeff = 8 - 2 = +6

3 0
3 years ago
Which two trials could be used to measure the surface area
OLEGan [10]

Answer:

Trials A and B

Explanation:

4 0
3 years ago
CH4 with pressure 1 atm and volume 10 liter at 27°C is passed into a reactor with 20% excess oxygen, how many moles of oxygen is
BaLLatris [955]

Answer : The moles of O_2 left in the products are 0.16 moles.

Explanation :

First we have to calculate the moles of CH_4.

Using ideal gas equation:

PV=nRT

where,

P = pressure of gas = 1 atm

V = volume of gas = 10 L

T = temperature of gas = 27^oC=273+27=300K

n = number of moles of gas = ?

R = gas constant = 0.0821 L.atm/mol.K

Now put all the given values in the ideal gas equation, we get:

(1atm)\times (10L)=n\times (0.0821L.atm/mol.K)\times (300K)

n=0.406mole

Now we have to calculate the moles of O_2.

The balanced chemical reaction will be:

CH_4+2O_2\rightarrow CO_2+2H_2O

From the balanced reaction we conclude that,

As, 1 mole of CH_4 react with 2 moles of O_2

So, 0.406 mole of CH_4 react with 2\times 0.406=0.812 moles of O_2

Now we have to calculate the excess moles of O_2.

O_2 is 20 % excess. That means,

Excess moles of O_2 = \frac{(100 + 20)}{100} × Required moles of O_2

Excess moles of O_2 = 1.2 × Required moles of O_2

Excess moles of O_2 = 1.2 × 0.812 = 0.97 mole

Now we have to calculate the moles of O_2 left in the products.

Moles of O_2 left in the products = Excess moles of O_2 - Required moles of O_2

Moles of O_2 left in the products = 0.97 - 0.812 = 0.16 mole

Therefore, the moles of O_2 left in the products are 0.16 moles.

7 0
3 years ago
What does it mean to truly love someone?​
Minchanka [31]

Truly loving someone means caring for them in the ways that they need to be cared for, with no strings attached. (That's why they call it unconditional love.)

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2 years ago
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