Answer:
Cohesion
Explanation:
Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.
Answer: Morse code and Braille use representations to form messages.
Explanation:
- they both have military roots.
-also a similarity is that braille letters are made of 1 to 6 dots, and Morse code is also made of 1 to 6 dots and dashes
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The number of moles of H atoms in 15.2 grams of pure ice is 0.850 moles
The number of moles of O atoms in 15.2 grams of pure ice is 13.50 moles
<h3>What is an atom?</h3>
An atom is a smallest indivisible particle of a chemical element that is capable of independent existence.
- Pure ice contains the H2O molecules and the molar mass of H2O is 18.02 g/mol
Using the relation:
- number of moles = mass/molar mass
The number of moles of H2O = 15.2 grams/18.02 g/mol
number of moles of H2O = 0.8435 moles
If the atomic mass of H and O are as follow:
- the atomic mass of H atom is = 1.00784 g/mol
- the atomic mass of O atom is = 15.999 g/mol
Then:
the number of H atoms in 15.2 grams of pure ice = mass of H atom × molar mass of H2O.
the number of H atoms = 0.8435 mol × 1.00784 g/mol
the number of H atoms = 0.850 moles
the number of O atoms in 15.2 grams of pure ice = 0.8435 mol × 15.999 g/mol
the number of O atoms = 13.50 moles
Learn more about atoms here:
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We can prepare CaCO₃ and MgO from dolomite.
<h3 /><h3>
What is Dolomite?</h3>
- Common rock forming mineral is called dolomite.
- It's chemical composition is CaMg(CO₃)₂.
- The component of the sedimentary rock is called dolostone.
- It is the primary component of the metamorphic rock known as dolomitic marble.
- Limestone that contains some dolomite is known as dolomitic limestone.
Dolomite is a mineral which is rarely found in the environment , but dolostones are the minerals which are very commonly found.
<h3>Properties of Dolomite:</h3>
- The trigonal-rhombohedral system is used to crystallise dolomite
- It forms crystals that are white, tan, green, or pink in colour.
- Dolomite is a double carbonate of calcium and magnesium ions arranged in an alternating structural structure.
- Granular dolomite is a medium to dark grey, brown, or white granular dolomite found in rocks.
- The lustre varies from dull to subvitreous. Dolomite, like calcite, cleaves into six-sided polyhedrons with diamond-shaped faces.
- Dolomite vein grains may be several centimetres in diameter.
<h3>Uses of Dolomite:</h3>
- Ornamental stone is used as Dolomite, and a magnesium oxide source, as well as used in the Pidgeon magnesium production process.
- Dolomite is often used in place where calcite limestone is used as as a flux for the smelting of iron and steel when calcite limestone is not available or very expensive.
- Therefore, it is also called dolomite limestone.
- Dolomite and dolomitic limestone are often used in horticulture as a pH buffer and magnesium source in soils .
- Calcined dolomite is also used as a catalyst invery high-temperature gasification of biomass in order to kill tar.
<h3>Preparation of CaCO₃ and MgO from dolomite:</h3>
- Dolomite is a double salt which consists of calcium carbonate (CaCO3) and magnesium carbonate (MgO) and it is one of the two forms of limestone.
- This dolomite is found in the Bangkalan area, which only used in landfill and used to make light stone. Existence the great potential for dolomite as a biomaterial then in this research was carried by making CaCO3/MgO from dolomite using a simple calcination method at 600°C, 700°C and 800°C for one hour From the results of XRD found that the CaCO3/MgO phase was formed optimally at a temperature of 700°C.
Thus from the above conclusion we can say that, we can prepare CaCO₃ and MgO from dolomite.
Learn more about Dolomite here :brainly.com/question/10283539
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