Let's work through these chemistry-related questions one by one with detailed explanations.
### Question 10:
What compound is magnesium dichloride?
- a) MCI
- b) MC12
- c) MgCl
- d) MgCl2
Magnesium dichloride refers to a compound formed by magnesium (Mg) and two chlorine atoms (Cl2). The correct chemical formula for magnesium dichloride is MgCl2.
Correct answer: d) MgCl2
### Question 11:
CaCO3 represents a chemical:
- a) Formula
- b) Subscript
- c) Symbol
- d) Reaction
CaCO3 is the chemical formula for calcium carbonate, a substance found in rocks. A chemical formula represents the kinds and numbers of atoms in a compound.
Correct answer: a) Formula
### Question 12:
What is the chemical formula for Fluorine trisulfide?
- a) FS
- b) FS3
- c) S3F
- d) none of the above
In chemical nomenclature, "trisulfide" means three sulfur atoms bonded with fluorine, which commonly represents compounds like SF3 in correct nomenclature. However, SF3 is not standard and highly unusual, thus none of the listed options are correct.
Correct answer: d) none of the above
### Question 13:
What is the formula for magnesium chloride?
- a) Mg2Cl
- b) Mg(ClO3)2
- c) MgCl
- d) MgCl2
Magnesium chloride consists of one magnesium (Mg²⁺) and two chloride ions (Cl⁻). This chemical combination results in the formula MgCl2.
Correct answer: d) MgCl2
### Question 14:
2 atoms of hydrogen and 1 atom of oxygen combine to form water. What is the chemical formula for water?
- a) H₂Oz
- b) HO₂
- c) H₂O
Water is composed of two hydrogen atoms and one oxygen atom. The chemical formula for water is H₂O.
Correct answer: c) H₂O
### Question 15:
What state of matter has a definite volume but no definite shape?
- a) Gas
- b) Plasma
- c) Solid
- d) Liquid
A liquid has a definite volume but takes the shape of its container. Unlike solids, which have both a definite volume and shape, and gases and plasmas, which have no definite shape or volume.
Correct answer: d) Liquid
These are the step-by-step solutions for the given questions.
