<span>Answer: B. Ionic solids have higher melting points than molecular solids.
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This is because the rest are false, as solids are able to melt, and do have melting points. Also, not all solids have the same melting points.
<h2>Answer:</h2>
2 hydrogen atoms.
<h2>Explanations:</h2>
Given the chemical formula H2SO4,
The compound shows that the formula has 4 atoms of oxygen, one atom of sulfur and 2 hydrogen atoms.
Therefore, the number of hydrogen atom in the molecule H2SO4 is 2 hydrogen atoms.
Answer:
Explanation:
The SI unit for mass is the KG
Answer:
a) 213.3 mg/L
b) 62.61 mg/L
c) 0.0225 mg/L
Explanation:
Theoretical oxygen demand (ThOD)is essentially the amount of oxygen required for the complete degradation of a given compound into the final oxidized products
a) Given:
Concentration of acetic acid,![[CH3COOH]](https://tex.z-dn.net/?f=%5BCH3COOH%5D)
= 200 mg/L
Based on the reaction stoichiometry:
mass of 
= 60 g
mass of 
= 2(32) = 64 g
b) Given:
Concentration of ethanol, ![[C2H5OH]](https://tex.z-dn.net/?f=%5BC2H5OH%5D)
= 30 mg/L
Based on the reaction stoichiometry:
mass of 
= 46 g
mass of = 3(32) = 96 g
c) Given:
Concentration of sucrose, ![[C12H22O11]](https://tex.z-dn.net/?f=%5BC12H22O11%5D)
= 50 mg/L
Based on the reaction stoichiometry:
mass of 
= 342 g
mass of = 12(32) = 384 g
An ore is a type of rock that contains many minerals. But a mineral is just a part of the ore. So all ores are minerals but all minerals are not ores.
