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yawa3891 [41]
2 years ago
12

In the periodic table, how are elements in the same group related to each other? A. They have the same atomic mass. B. They have

very different properties. C. They have the same atomic number. D. They have very similar properties.
Chemistry
2 answers:
SashulF [63]2 years ago
5 0

Answer:

D. They have very similar properties.

Explanation:

A. They have the same atomic mass.

 ⇒ This is false, every element has a different atomic mass.

B. They have very different properties

 ⇒ This is false. elements in the same group have similar properties

C. They have the same atomic number.

⇒ Every element has a unique and different atomic number

D. They have very similar properties.

 ⇒ This is correct. Elements in the same group usually have similar properties, because they have the same number of electrons in the outermost electron shell.

Irina-Kira [14]2 years ago
3 0
Elements in the same group tend to have very similar properties (D). This is due to the number of valence electrons each group has.
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A container of hydrogen at 172 kPa was decreased to 85.0 kPa producing a new volume of 3L. What was the original volume?
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Answer:

<h2>The answer is 1.48 L</h2>

Explanation:

In order to find the original volume we use the same for Boyle's law which is

P_1V_1 = P_2V_2

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the original volume

V_1 =  \frac{P_2V_2}{P_1}  \\

From the question

P1 = 172 kPa = 172000 Pa

P2 = 85 kPa = 85000 Pa

V2 = 3 L

We have

V_1 =  \frac{85000 \times 3}{172000}  =  \frac{255000}{172000}  =  \frac{255}{172}  \\  = 1.482558139...

We have the final answer as

<h3>1.48 L</h3>

Hope this helps you

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3 years ago
Is carbon dioxide formed during incomplete combustion of methane? ...?
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Ksp = [Ag+][Br-]
5 0
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describe how 250 cm³ of 0.2 mol/dm³ H2SO4 could be prepared from 150 cm³ of 1.0mol/dm³ stock solution of the acid​
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Answer:

Explanation:

250 cm^3 of 0.2 moldm-3 H2SO4 can be prepared from 150cm^3 of 1.0 moldm^-3 by dilution.

150cm^3 of the 1.0 moldm^-3 stock solution is measured out using a measuring cylinder and transferred into a 250 cm^3 standard volumetric flask and made up to mark. The resulting solution is now 250cm^3 of 0.2 moldm-3 H2SO4.

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3 years ago
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arsen [322]

Answer:

Electromagnetic Force

Explanation:

Every aspect of chemical reaction is the output of electromagnetic force though the forces can take on many forms because of the quantum wave nature of particles.

The electromagnetic force has the ability to attract opposite charges such as protons and electrons and it repels same charges such as electrons and protons.

This force is an important force in the chemical reaction as it it is responsible for bonding between atoms. Though other forces are unique in their own way but they don't affect chemical reaction. Force of gravity is not strong enough to affect chemical reactions; when nuclear forces are involved in a reaction, such reaction is a nuclear reactor; not chemical reaction.

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