Answer: no
Explanation:
What holds hydrogen and oxygen atoms together in in a water molecule? ... No because there are 2 oxygen not 1 so they are different compounds. two formulas for compounds containing hydrogen and oxygen are H2O and H2O2
Answer:
A chemical change is required to separate the elements present in it.
Explanation:
The only true statement from the choices given is that water as a pure substance requires a chemical change to separate the elements present in it.
Water is a molecule consist of two atoms of hydrogen and one atom of oxygen.
- The atoms are covalently bonded together.
- A chemical process, the electrolysis of water is often used to separate the atoms of a water.
- Physical changes cannot be used to separate the atoms of water.
- Water is a compound which consists of two elements.
Therefore, we see that only the first choice satisfies this problem.
Answer:
K₂S
Explanation:
A chemical formula is a formula showing the symbols of elements present in a compound.
It shows the symbols of the elements in a compound and the number of atoms of each element in the compound.
To write the formula of the compound we need to;
- First, identify the elements in the compounds and their symbols
- In this case, the symbols of potassium and sulfur are K and S respectively.
- Secondly, we need to know their valency.
- Potassium has a valency of 1 since it reacts by losing one electron to attain stability while sulfur has a valence of 2 since it reacts by gaining two electrons to attain an octet configuration.
- Thirdly, we write the formula with each element taking the valency of the other element as a subscript.
- We get our formula as K₂S.
Answer:
Both,
Both,
Vertical
Explanation:
When you push a lawn mower, you can be moving up and down or across, when your pushing a wheel barrel you can do the same, when you do a push up your going up and down which is vertical.
If a chemical equation is not balanced it implies that either mass has been created or destroyed which is a contradiction to law of conversation of mass which states that matter can niether be created nor destroyed.
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
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