Answer:
2.5 M NaOH
Explanation:
The solution with the highest molarity is the most concentrated one.
Molarity is the number of moles per unit volume of a solution.
- Molarity =
2.5M implies there are 2 mole of NaOH per solution of this given substance.
This is the highest from the list as other ones falls below it.
The lowest concentration is 0.2M because just 0.2 mole of NaOH is contained per unit volume.
Answer: -
Only C(s) and Br2(l)
Explanation: -
Ionic compounds are formed between metals and nonmetals.
We use the term molecule when covalent compounds are formed but not for ionic compounds. In the case for Na(s) and O2(g), an ionic compound is formed. Similarly between Mg (s) and I2(s) an ionic compound is formed.
Only between C(s) and Br2 (l) a covalent compound gets formed. These compound is formed of molecules.
Answer:
Anthracite: The highest rank of coal. This coal is hard, brittle, and black lustrous. It is often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.
Explanation: There are four ranks of coal
Coal rank measures the carbon content which is in correlation with calorific value and metamorphic grade. It has a very high carbon (over 90%) and low volatile content (below 5%)1.
Answer:
if the value of volume doubles but the mass stays the same, the value for density will be 1