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3 years ago

Select the correct answer.

Chemistry

1 answer:

givi [52]3 years ago

6 0

Answer:

{1s^2 2s^2 2p^6} 3s^2 3p^4

{Ne}3s^2 3p^4

Explanation:

i didnt understand the rest of that but this is the e- configuration on top and the bottom is noble gas configuration

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What is the mass in grams of 6.022 x 1023 molecules of CO2?

Kamila [148]

Answer: Molar mass of CO2 is 44 gram/mol. So,the mass of 1 mole or 6.02*10^23 molecules of CO2 is 44 grams

Explanation:

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3 years ago

How is the enthalpy of reaction shown in this potential energy diagram?

Snowcat [4.5K]

Answer : The correct option is C.

Explanation :

Enthalpy of reaction : It is defined as the changes in heat energy takes place when reactants go to products. It is denotes as $\Delta H$ .

$\Delta H$ = Energy of product - Energy of reactant

$\Delta H$ is positive when heat is absorbed and the reaction is endothermic.

$\Delta H$ is negative when heat is released and the reaction is exothermic.

In the given potential energy diagram, the energy of product at higher level and energy of reactant at lower level. The $\Delta H$ for this reaction will be positive.

So, the enthalpy of reaction is defined as the difference of the energy of the reactants and the energy of the products.

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4 years ago

Which of these substances are molecules?

Studentka2010 [4]

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. So I would say is all of them, as they all contain two atoms each even in the diatomics

7 0

3 years ago

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What is the mass of an object if force of -136 n can make it accelerate at -9.6 m/s^2

vampirchik [111]

The answer for the following problem is mentioned below.

Therefore the mass of an object is 14.16 grams.

Explanation:

Force:

The push or pull on an object with mass that cause change in the velocity

It is a vector quantity.

The formula to calculate the force is:

F = m × a

Given:

Force (F) = -136 N

acceleration (a) = -9.6 m/s^2

To calculate:

mass of the object (m)

We know that,

F = m × a

where,

F represents the force of the object

m represents mass of an object

a is acceleration of an object

From the equation;

-136 = m × -9.6

m = $\frac{-136}{-9.6}$

m = 14.16 grams

Therefore the mass of an object is 14.16 grams.

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4 years ago

Neon's outer energy level contains ______________ electrons. A) 2 B) 8 C) 10 D) 20

yuradex [85]

B) 8

Neon is a noble gas which means it is in the 18th group which has 8 valence electrons. Thus Neon has 8 valence electrons.

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3 years ago

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