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3 years ago

A chemical equation does not give information about what

Chemistry

1 answer:

Lana71 [14]3 years ago

8 0

A chemical equation does not give information about the following:

It usually does not give the "state of the substances". There are three states: Solid(s), liquid(q) and gas(vap).
The chemical equation does not show whether it is complete or incomplete.
The "speed of the reaction" is not mentioned.
The "concentration of the substance" whether it is diluted or concentrated is not mentioned.
The "rate of the reaction", temperature, catalyst, pressure etc is not mentioned. These can be mentioned "above or below the arrow".

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If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the struct

Inessa05 [86]

Answer:

The correct option is: bent 109°

Explanation:

Covalent molecules are the molecules in which the atoms are linked by covalent bonds. The electrons involved in the formation of a covalent bond are known as shared pair or bond pair of electrons.

The three-dimensional arrangement of the atoms of a molecule in space is known its molecular structure or geometry.

Given molecule: XY₂, having two lone pairs around the central atom X.

Since the molecule XY₂ has two lone pairs and two bond pairs of electrons. Therefore according to the VSEPR theory, the given molecule has a bent molecular geometry with 109° bond angle.

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3 years ago

A chemistry student measures out 41 grams of sodium hydroxide, NaOH. They react it with an excess of hydrochloric acid, HCl, for

exis [7]

The answer will be around 687.928 grams

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3 years ago

An investor has an account with stock from two different companies. Last year, his stock in Company A was worth $7200 and his st

djyliett [7]

Answer:

22.7%

Explanation:

Given that last year stock for company A was $7200

The stock for company B last year was worth $3510

Stock in company A decreased by 24%

This means the new value of stock for company A became;

(100-24)/100 *$7200

76/100*$7200

0.76*7200 =$5472

Stock in company B decreased by 20%

This means the new value of stock for company B became;

(100-20)/100 *$3510

80/100*$3510

0.8*$3510

$2808

Original investors stock value was = $7200+$3510 =$10710

New investors stock value is = $5472+$2808=$8280

Decrease in value of stock = $10710-$8280 =$2430

percentage decrease in stock value = decrease in stock/original value of stock *100%

=2430/10710 *100 =22.689

=22.7%

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3 years ago

Which statement best explains the energy change that will occur when the

amid [387]

Answer:the answer is D

Explanation:

I have already taken the exam. Hope this helps

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3 years ago

Read 2 more answers

How many electrons fit in the part of the third energy level shown

makkiz [27]

Answer:

18 electrons

Explanation:

Note: The third energy level can actually hold up to 18 electrons, so it is not really filled when it has 8 electrons in it.

5 0

2 years ago