Answer:
In the lab, students were encouraged to look at different types of rocks and minerals. They were also told to observe the physical properties of the rocks and minerals. Based on these physical properties, the children were able to distinguish the different types of rocks and minerals. The major differences which the children will focus on will be the color, shape, hardness, luster, streak, fracture and cleavage of the rocks and minerals.
Ca(OH)2 + HCl → CaCl + H2O is not a correct acid- base neutralization reaction
<em><u>Explanation</u></em>
<em> Acid and base react to form salt and water.</em>
The reaction of Ca(OH)2 + HCl → CaCl2 +H2O is not correct because
- The formula of salt formed is incorrect. It is suppose to be CaCl2 since Ca has a charge of 2+ while cl- has a charge of -1. Therefore to form ionic bond 2 Cl ion are needed.
- The equation is not balanced. there is suppose to be 2 in front of HCl and in front of H2O
Therefore the correct acid -base neutralization reaction is as below
Ca(OH)2 + 2HCl→ CaCl2 + 2H2O
Answer:
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
Explanation:
Answer: THe anwser for the first one is Carbon monoxide, Cupric selenide, iron or sulfide, lead dioxide
Explanation: i took these in science ur welcome
Answer:
C.
Explanation:
The heat island effect or the the urban heat island effect, is where the temperature of an area is higher than close rural areas. This is because materials suh and concrete and asphalt absorb the sunlight and store it, causing extreme weather.