Answer: Slowly move at least 3 m away from the side mirror. Observe your image as you ... Compare the images formed in different mirrors. ... but if i stand 3m away, even though there is no light, it reflects the other material it can ... is transparent so you cannot see yourself much in the mirror, that is my observation.
Explanation:
Hard.
Form crystal lattices not molecules.
Good insulators.
High melting points/ Boiling Points.
Conduct electricity when dissolved in water or as a liquid.
Solids do not conduct electricity.
The ionic compound formed by sodium and sulfur is Na2S, whose name is sodium sulfide.
The chemical formula tells you the ratio between the two elements is 2Na/1S or 1S/2Na
So, if you have 6.4 * 10^22 sodium ions, you will have
6.4 * 10^22 Na * 1S / 2Na = 3.2 * 10^22 S.
Answer: the compound contains 3.2 * 10^22 sulfide ions.
The mass of calcium hydroxide that is formed when 10.0 g of CaO reacts with 10.0 g of water is 13.024 grams
calculation
from the equation
CaO + H2O → Ca(OH)2,
1 moles of CaO reacted with 1 moles of H2O to form 1 moles of Ca(OH)2
find the moles of each reactant
moles=mass/molar mass
moles of CaO= 10 g/56 g/mol=0.179 moles
moles of H2O = 10 g/18 g/mol 0.556 moles
CaO is the limiting reagent therefore by use of mole ratio of CaO:Ca(OH)2 which is 1:1 moles of Ca(OH)2 is = 0.179 moles
mass= moles x molar mass
= 0.176 moles x 74 g/mol = 13.024 grams
