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yulyashka [42]
3 years ago
6

Which solution is a homogeneous mixture?

Chemistry
2 answers:
otez555 [7]3 years ago
7 0
Salt and water is a homogeneous mixture. Sand and water,salad dressing,soil are heterogeneous mixtures.
notsponge [240]3 years ago
4 0

Answer : The correct option is, salt and water  

Explanation :

  • Heterogeneous mixtures : It is a type of mixture in which the appearance of the solution throughout is non-uniformly and the particle size or shapes are also different.
  • Homogeneous mixtures : It is a type of mixture in which the appearance of the solution throughout uniformly and the particle size or shapes are not different.

Sand and water : It is a heterogeneous mixture in which the particle size of the sand and water are different. The mixture of sand and water can be separated by the physical method like filtration.

Salt and water : It is a homogeneous mixture in which the salt is completely dissolves in the water. The mixture of salt and water can not be separated by the physical method.

Salad dressing  : It is a heterogeneous mixture in which the particle size of the salad are different. The Salad dressing can be separated by the physical method.

Soil : It is a heterogeneous mixture in which the particle size of the solit are different. The soil can be separated by the physical method.

Hence, the salt and water solution is a homogeneous mixture.

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Write the ionic charges (such as Ca2+) and chemical formulas and fill-in the table below.
Vikentia [17]

1) Lithium and fluorine:

Ionic charges: lithium cation Li⁺ and fluorine anion F⁻.

Chemical formula LiF.

In ionic salt lithium fluoride (LiF), fluorine has electronegativity approximately χ = 4 and lithium χ = 1 (Δχ = 4 - 1; Δχ = 3).

Fluorine attracts electron and it has negative charge and lithium has positive charge.

2) Beryllium and oxygen:

Ionic charges cation Be²⁺ and anion O²⁻.

Chemical formula is BeO.

Beryllium is metal from group 2 and oxygen is nonmetal from group 16.

Electron configuration of beryllium: ₄Be: 1s² 2s², it has two valence electrons in 2s orbital.

Beryllium lose two electrons and to gain electron configuration as noble gas helium (He).

Electron configuration of oxygen atom: ₈O 1s² 2s² 2p⁴.

Oxygen gain two valence electron to form anion with stable electron configuration as noble gas neon (atomic number 10).

3) Magnesium and fluorine:  

Ionic charges cation Mg²⁺ and anion F⁻.

Chemical formula is MgF₂.

Magnesium fluoride (MgF₂) is salt, ionic compound.  

Magnesium (Mg) is metal from 2. group of Periodic table of elements and has low ionisation energy and electronegativity, which means it easily lose valence electons (two valence electrons).  

Magnesium has atomic number 12, which means it has 12 protons and 12 electrons. It lost two electrons to form magnesium cation (Mg²⁺) with stable electron configuration like closest noble gas neon (Ne) with 10 electrons.  

Fluorine (F) is nonmetal with greatest electronegativity, which means it easily gain electrons.  

Fluorine has atomic number 9, which means it has 9 protons and 9 electrons. It gain one electron to form fluorine anion (F⁻) with stable electron configuration like closest noble gas neon (Ne) with 10 electrons.  

4) Aluminum and chlorine:  

Ionic charges cation Al³⁺ and anion Cl⁻.

Chemical formula is AlCl₃.

The right name for AlCl₃ is aluminium chloride.

Aluminium chloride is a salt with ionic bonds.

Aluminium (metal from group 13) has oxidation number +3 and chlorine (nonmetal from group 17) has oxidation number -1, chemical compound has neutral charge (+3 + 3 · (-1) = 0).

5) Beryllium and nitrogen:  

Ionic charges cation Be²⁺ and anion N³⁻.

Chemical formula is Be₃N₂.

Atomic number of nitrogen is 7, it has 7 protons and 7 electrons.

Electron configuration of nitrogen atom: ₇N 1s² 2s² 2p³.

Nitrogen gain three electrons to form anion with stable electron configuration as noble gas neon (atomic number 10).

4 0
3 years ago
What is radius? When might you need to measure an object’s radius?
katrin2010 [14]
It’s halfway into the circle, you would need it when trying to find the circumference
3 0
3 years ago
Modern atomic theory states that the atom is a diffuse cloud surrounding a small, dense nucleus. Identify which particle is in t
yaroslaw [1]
B) proton
electrons are in a cloud around it, ions are elements with a charge, idk what a free radical is but ik that protons and neutrons are inside the nucleas
4 0
3 years ago
What volume of silver will weigh exactly 2500 g. The density of silver is 10 g/cm3.
zysi [14]

Answer:

<h2>250 cm³</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question we have

volume =  \frac{2500}{10}  \\

Wr have the final answer as

<h3>250 cm³</h3>

Hope this helps you

7 0
3 years ago
A banana rots if its out to long.What property is this
s2008m [1.1K]
Chemical properties because <span>It`s the ethylene gas and bacteria and fungi that attack the banana.</span>
6 0
3 years ago
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