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2 years ago

Substance is matter with a composition that is ?

Chemistry

1 answer:

STatiana [176]2 years ago

8 0

Answer:

A substance is a form of matter that will have a constant composition of evenly distributed products.

Explanation:

(Has to be the same everywhere)

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What is the joining of atoms to form new substances called?

kirill115 [55]

Chemical bonds is the answer

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2 years ago

_____ is the degree of attraction of one atom for the valence electrons of another atoms. Electronegativity Ionization energy Co

yan [13]

<span>Electronegativity maybe.......</span>

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3 years ago

Read 2 more answers

The first step of electrophilic aromatic substitution involves the formation of the arenium ion intermediate.

Anastaziya [24]

Answer:

True

Explanation:

Aromatic compounds undergo substitution rather than addition reactions because the aromatic structure is maintained.

Electrophilic aromatic substitution begins with attack of the electrophile on the aromatic ring to yield a delocalized intermediate called the arenium intermediate. Loss of hydrogen from this intermediate yields the final product.

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3 years ago

If 0.250 mol of hydrogen gas occupies 0.333L at 20.0c what is the pressure in atmospheres?

maria [59]

Answer: The pressure will be 18.05 atm.

Explanation: Expression for ideal gas equation is :

$PV=nRT$

where,

P = Pressure of the gas = ? atm

V = Volume of the gas = 0.333L

n = Number of moles of gas = 0.250 moles

R = Universal gas constant = $0.082057\text{ L atm }mol^{-1}K^{-1}$

T = temperature of the gas = 20°C = (273 + 20)K = 293K

Putting values in above equation, we get:

$P\times 0.333L=0.250mol\times 0.082057\text{ L atm }mol^{-1}K^{-1}\times 293K$

P = 18.05 atm

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3 years ago

How many atoms are in 0.100 mol of C3H8

Natalija [7]

Number of atoms = mole x Avogadro’s Number

= 0.1 x 6.022 x 10^23
= 6.022 x 10^22

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3 years ago