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Water is one of the most essential substances on earth. All living things need water to survive. Even though water seems to be everywhere, it is actually a limited resource. Only a small percentage of the world’s water is fresh water that is suitable for drinking. The rest is salt water from the ocean or trapped in glaciers.
Water is constantly recycled through the water cycle, but human activities are polluting and contaminating our fresh water supplies. It is important to conserve water and use it wisely to protect this vital resource.
Table Of Contents
Which is true regarding water a compound?
Water is a compound because it contains more than one type of atom. In this case, water is made up of two hydrogen atoms and one oxygen atom.
What is true regarding the structure of a water molecule?
A water molecule is made up of two hydrogen atoms and one oxygen atom. The hydrogen atoms are bonded to the oxygen atom via covalent bonds. Water molecules are held together by these bonds, which give water its structure.
What is a true regarding air?
Air is a gas made up of nitrogen, oxygen, and other gases. It is invisible and odorless.
Which gas is found maximum in air?
Nitrogen gas is found maximum in air. It is a colourless, tasteless, and mostly odorless gas. Nitrogen makes up about 78 percent of Earth’s atmosphere.
Frequently Asked Questions (FAQs)
What type of bonds are in water?
Water molecules are held together by hydrogen bonds. These are weaker than the covalent bonds that hold together the atoms within the water molecules, but they are strong enough to keep the molecules close together.
Why is water essential to life?
Water is essential to life because it is necessary for many biochemical reactions to take place. It is also a good solvent, so it can help to transport nutrients and wastes around the body.
What kinds of bonds are present in a single water molecule?
A water molecule has two hydrogen atoms covalently bonded to a single oxygen atom. In addition to these covalent bonds, the water molecules are also held together by hydrogen bonds.
How many lone pairs are in water?
Each water molecule has two lone pairs of electrons on the oxygen atom.
Do humans need nitrogen?
Humans do not need nitrogen, but it is a important element in many biological processes. For example, nitrogen is a key component of DNA and proteins.
Are humans made of stardust?
Yes, humans are made of stardust. All of the elements that make up the human body were created in stars.
What happens if we breathe nitrogen?
Breathing nitrogen is not harmful to humans because we have enzymes that can convert it into other useful compounds. However, breathing pure nitrogen can lead to a condition called hypoxia, where the body tissues do not get enough oxygen.
Why is water called water?
The word “water” comes from the Old English word “wæter”, which means “liquid”.
How many molecules do you think are in one drop of water?
There are approximately 3.3 x 10^23 molecules in one drop of water.
How many atoms are in a human?
There are approximately 7 x 10^27 atoms in a human body.