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3 years ago

What is the relationship between atoms, elements and compounds?

Chemistry

1 answer:

KatRina [158]3 years ago

4 0

Compound is formed when two or more chemical elements are chemically bonded together. elements are made of atoms

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Iron is the most

Georgia [21]

hope this is correct

Answer:

Explanation:

Iron is the fourth most abundant element, by mass, in the Earth's crust. The core of the Earth is thought to be largely composed of iron with nickel and sulfur. The most common iron-containing ore is haematite, but iron is found widely distributed in other minerals such as magnetite and taconite.

5 0

4 years ago

How many electrons are being shared between the two carbon atoms in the compound ethyne? Ethyne has the Lewis structure: H−C≡C−H

Komok [63]

Thhhhhhhhhhhhhhhe ansssssssssswerrrrrrrrrrrrrrrrrrr is 4!

8 0

3 years ago

The initial pressure of a mixture of C6H6 and an excess of H2 in a rigid vessel is 1.21 atm. A catalyst is introduced. After the

KengaRu [80]

Answer:

mole fraction of C6H6 = 0.613 atm

Explanation:

The equation for this reaction is :

$C_6H_6 _{(g)} + 3H_2_{(g)} \to C_6H_{12}_{(g)}$

Initial P₁ P₂ 0

Final 0 P₂ -P₁/2 P₁

After completion of the reaction;

P₁ + P₂ = 1.21 atm ----- (1)

P₂ - P₁/2 + P₁ = 0.839 atm

P₂ + P₁/2 = 0.839 atm ----- (2)

Subtracting (2) from (1); we have:

P₁/2 = 0.371

P₁ = 0.742 atm

From(1)

P₁ + P₂ = 1.21 atm

0.742 atm + P₂ = 1.21 atm

P₂ = 1.21 atm - 0.742 atm

P₂ = 0.468 atm

Thus, the partial pressure of C6H6 = 0.742 atm

∴

Partial pressure = Total pressure × mole fraction of C6H6

mole fraction of C6H6 = Partial pressure / Total pressure

mole fraction of C6H6 = 0.742 atm / 1.21 atm

mole fraction of C6H6 = 0.613 atm

5 0

3 years ago

Irina-Kira [14]

Answer:

A magnet

Explanation:

6 0

3 years ago

Vinegar is a dilute solution ethanoic acid in water (see the question above for the structure of ethanoic acid). In order to tes

Dovator [93]

Answer:

Explanation:

Below is the equation of the chemical reaction:

CH3COOH (aq) + NaOH (aq) ----------> CH3COONa (aq) + H2O (l)

The mole ratio of acid and base in the balanced equation is:

Ma = 1, Mb = 1

Cb = 0.1001 mole/Kg

Ca = ???

Va = 10 grams

Vb = 131.44 - 48.11 = 83.33 grams

From the acid-base mole ration formula

$\frac{Ma}{Mb} = \frac{Ca x Va }{Cb * Vb}$

$\frac{1}{1} = \frac{Ca x 10 }{0.1001 * 83.33}$

$Ca = \frac{0.1001 x 83.33}{10.00} = 0.8341333 mole/kg$

The number of moles of acetic acid in the sample = $0.8341333 * \frac{10}{1000} = 0.008341333 moles$

Therefore 0.008341333 moles of acetic acid are in the sample.

8 0

3 years ago