객관식
Which action is performed by the slightly charged parts of a water molecule when salt (such as NaCl) dissolves in water?
88
views
1. Intro to General Chemistry
Chemical Properties
객관식
Which of the following minerals is the main component in the cement slab commonly found in houses?
A
Portlandite (Ca(OH)_2)
B
Quartz (SiO_2)
C
Gypsum (CaSO_4 · 2H_2O)
D
Calcite (CaCO_3)
검증된 단계별 안내1
Understand that cement slabs in houses are primarily made from materials that result from the hydration of cement compounds, which typically involve calcium-containing minerals.
Recall that Portlandite, with the chemical formula \(\text{Ca(OH)}_2\), is a product formed during the hydration of Portland cement and is a major component in hardened cement paste.
Recognize that Quartz (\(\text{SiO}_2\)) is a common mineral in sand and aggregates but is not a main chemical component of cement itself.
Note that Gypsum (\(\text{CaSO}_4 \cdot 2\text{H}_2\text{O}\)) is added to cement to control setting time but is not the main component of the hardened cement slab.
Understand that Calcite (\(\text{CaCO}_3\)) is a common mineral in limestone and marble but is not the primary component in cement slabs; it may be present as an aggregate or filler.
관련 영상
관련 실천
