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3 years ago

Briefly explain in your own words why the bond angle increases as the number of electron groups decreases

Chemistry

1 answer:

tekilochka [14]3 years ago

4 0

Answer:

i) The bond angle decreases due to the presence of lone pairs, which causes more repulsion on the bond pairs and as a result, the bond pairs tend to come closer. ii) The repulsion between electron pairs increases with an increase in electronegativity of the central atom and hence the bond angle increases.

Explanation:

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Advantages and disadvantages of chemical

Anit [1.1K]

Answer:

Advantages :they are used for seeing chemical reactions .

they are used for doing chemical experiment .

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3 years ago

How do you think engineers use the specific heat of various substances when they are designing new products?

Snezhnost [94]

Answer:

engineers use knowledge of heat of reaction to predict how much energy will be produced in a chemical system, which is important for keeping the reactor safe and efficient. Beyond chemical reactions, heat is exchanged for physical reactions, too.

5 0

3 years ago

What are some possible ways these rocks were formed? Be sure to discuss all 3 rocks.<br> pls help me

horrorfan [7]

The brownish rock is a sedimentry rock was formed when things like sand, mud, or pebbles get laid down in layers. Eventually the layers are lithified.

The grey rock is a metamorphic rock and was when other rocks are changed because of heat or pressure. Earth movements can cause rocks to be deeply buried or squeezed. As a result, the rocks are heated and put under great pressure. They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks.

The red dots rock is an igneous rock. Igneous rock forms when hot, molten rock crystallizes and solidifies.

8 0

3 years ago

Read 2 more answers

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

Part A

KonstantinChe [14]

Answer:

The answer to your question is below

Explanation:

[H₃O⁺] = 2 x 10⁻¹⁴ M

pH = ?

Formula

pH = - log [H₃O⁺]

Substitution

pH = - log [2 x 10⁻¹⁴]

Result

pH = 13.7

[H₃O⁺] = ?

pH = 3.12

Formula

pH = - log [H₃O⁺]

Substitution

3.12 = - log [H₃O⁺]

$10^{-3.12} = [H_{3} O^{+}]$

Result

[H₃O⁺] = 7.59 M

7 0

3 years ago