<span>The vaporization of br2 from liquid to gas state requires 7.4 k/cal /mol.</span>
Answer: kg= 0.37
Explanation:
Use the molality formula.
M= m/kg
The one abt respiration the answer is the first one and circulatory system is the last one that says “delivery molecules …”
Potassium is placed where it is based on its properties and it's reactivity. It's also placed there based on it's atomic number.
Answer:
A. Because they are compounds, they cannot be pure substances.
Explanation:
The false statement from the given choices is that because they are compounds they cannot be pure substances. In fact, because they are compounds they are pure substances.
Pure substances are made up of elements and compounds and they have the following properties:
- All parts are the same throughout
- Composition is definite
- They cannot easily be separated or broken
- Separation by physical method is not easy
- They have unique sets of physical and chemical properties.
