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4 years ago

This periodic table entry is for the element neon. How many neutrons does a typical neon atom have?

Chemistry

2 answers:

Alinara [238K]4 years ago

8 0

A typical neon atom has 10 neutrons

natulia [17]4 years ago

7 0

10 would be the answer

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Predict whether the following reactions will be exothermic or endothermic. Reaction A. N 2 ( g ) + 3 H 2 ( g ) ⟶ 2 NH 3 ( g ) Re

Marina86 [1]

Answer :

Exothermic reactions : A, B, D

Endothermic reaction : C

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

As we know that, heat is released in the bond formation and heat is required in the bond breaking.

Reaction (A):

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

In this reaction, the more bonds are formed than the bond broken. That means, heat will be released. So, It is an exothermic reaction.

Reaction (B):

$S(g)+O_2(g)\rightarrow SO_2(g)$

In this reaction, burning of sulfur with oxygen takes place. That means, heat will be released. So, It is an exothermic reaction.

Reaction (C):

$2H_2O(g)\rightarrow 2H_2(g)+O_2(g)$

This reaction is a decomposition reaction. That means, heat will be required. So, It is an endothermic reaction.

Reaction (D):

$2F(g)\rightarrow F_2(g)$

In this reaction, formation of fluorine molecule from its atoms releases heat. So, It is an exothermic reaction.

Hence, the exothermic reactions are, A, B, D and endothermic reaction is, C

3 0

3 years ago

Plz help I’ll give brainliest!!<br> Describe the temperate coniferous forest?<br> Explain

andriy [413]

Answer:

Temperate coniferous forest is a terrestrial biome defined by the World Wide Fund for Nature. This is because Temperate coniferous forests are found predominantly in areas with warm summers and cool winters, and vary in their kinds of plant life.

Explanation:

5 0

2 years ago

18. Describe the relationship between kinetic energy and mass, and give an example of

lidiya [134]

Answer:

Kinetic energy is directly proportional to mass

Explanation:

Kinetic energy is directly proportional to the mass of an object and also directly proportional to the square of the velocity of that object:

$E_k = \frac{1}{2} mv^2$

Notice that if we keep velocity constant and only increase the mass of a object, the kinetic energy of that object would increase, as we've already emphasized the direct relationship between the kinetic energy term and the mass term.

Let's take a simple example: assume that object 1 and object 2 are both moving at the same velocity but object 1 has a much lower mass than object 2. According to the equation, object 1 has lower kinetic energy. This object can then transform all of its kinetic energy into some other form, say, heat the ground. The heat transferred will be significantly lower than by the object 2 moving at the same velocity but having a much greater mass.

5 0

4 years ago

How many joules will it take to raise 5 grams of water by 1 c

bazaltina [42]

15? Idk I'm guessing I'm sorry

3 0

3 years ago

How many hydrogen atoms are missing in ethane compared to ethane

Lera25 [3.4K]

Isomer types. The connectivity and molecular motion due to bond rotations within a molecule can result in atoms that are considered to be equivalent or non-equivalent types. For example, the six hydrogen atoms in ethane are considered to be chemically equivalent

6 0

3 years ago