Hydrogen bonds between water molecules occur because of the polarity of the water molecule.
A hydrogen bond is a weak bond that forms between a hydrogen atom that is covalently bonded to a highly electronegative atom and another highly electronegative atom in the same or a different molecule.
A water molecule consists of two hydrogen atoms and one oxygen atom. The hydrogen atoms are bonded to the oxygen atom, but the electrons in the covalent bonds are not shared equally. This results in a partial negative charge on the oxygen atom and a partial positive charge on the hydrogen atoms.
When two water molecules are close together, the partial positive charge on one hydrogen atom is attracted to the partial negative charge on the oxygen atom of the other molecule. This attraction is called a hydrogen bond.
Therefore, due to polarity of the water molecule, it results into hydrogen bonds between water molecules.
Learn more about hydrogen bond here:
#SPJ6
Answer:
1. Sand Casting: Sand casting is a popular method used to create pewter objects. Here's how it's achieved:
- First, a pattern or model of the desired object is created using materials like wood, plastic, or metal.
- The pattern is then pressed into a special type of sand called green sand, leaving an impression.
- Next, the pattern is removed, leaving a cavity in the sand.
- Molten pewter is poured into the cavity and left to cool and solidify.
- Once cooled, the sand is carefully removed, revealing the pewter object.
2. Spin Casting: Spin casting, also known as centrifugal casting, is another way to mold pewter. Here's how it works:
- A rubber mold of the object is created, usually using a master pattern made of wax or another material.
- The rubber mold is placed in a casting machine that rotates at high speed.
- Molten pewter is poured into the mold while it spins.
- The centrifugal force evenly distributes the pewter, filling the mold's cavities.
- As the pewter cools, it solidifies and takes the shape of the mold.
- Once cooled, the mold is opened, and the pewter object is removed.
3. Die Casting: Die casting is a method used for producing high-quality pewter objects. Here's how it's done:
- A metal mold, called a die, is created to match the desired shape of the object.
- Molten pewter is injected into the die under high pressure.
- The pressure ensures that the pewter fills the mold completely and captures all the intricate details.
- After a short cooling period, the die is opened, and the pewter object is ejected.
Explanation:
These are just a few ways to form or mold pewter. Each method has its advantages and is suitable for different types of objects. It's important to choose the appropriate method based on the complexity of the design and the desired quality of the final product.
The substance that represents a compound among the given options is CO. The correct answer is (3) CO(g)
From the question,
We are to determine which of the given substances is a compound.
First, we will define a compound
A compound is a chemical species that is formed when two or more atoms join together chemically, with covalent or ionic bonds.
OR
A compound is a substance that contains atoms of two or more different elements, and these atoms are chemically joined together
NOTE: A molecule consisting of atoms of only one element is NOT a compound.
Among the given options, only CO satisfies the definition of a compound, because it contains two different elements, Carbon (C) and Oxygen (O).
Hence, the substance that represents a compound among the given options is CO. The correct answer is (3) CO(g)
Learn more here: brainly.com/question/12862037
B) 1.62 x 10^-17
C) 4.42 x 10^-23
D) 1.99 x 10^-25
E) 1.51 x 10^-17
to write laws
to execute laws
to lead the military
Answer:
to interpret laws
Explanation:
Answer:
To Interpet Laws
Explanation: