They are called "energy levels".
Answer:
(A) Mixture; physical; (B) compound; chemical; (C) mixture; physical
Explanation:
(A) Orange liquid
Mixture — Red solid dissolved in yellow liquid gives orange solution
Physical change — separated by distillation with no change to the substances
(B) Crystalline solid
Compound — decomposition converts a substance into two or more different substances with different properties.
Chemical change — new substances formed.
(C) Cup of tea
Mixture — sugar is dissolved in the tea
Physical change — the tea and sugar retain their original properties.
It would be extradited from the extraordinary and you should look into twice it helps a lot
Answer:
a) 40 %
b)
c)
Explanation:
For a) we will have to calculate the <u>molar mass</u> of , so the first step is to find the <u>atomic mass</u> of each atom and multiply by the <u>amount of atoms</u> in the molecule.
C => 12*(6) = 72
H => 1*(12) = 12
O => 6*(16) = 96
Molar mass = 180 g/mol
Then we can calculate the percentage by mass:
For b) we have to start with the <u>reaction of glucose</u>:
Then we have to convert the grams of glucose to moles, the moles of glucose to moles of carbon dioxide and finally the moles of carbon dioxide to grams. To do this we have to take into account the<u> following conversion ratios</u>:
-) 180 g of glucose = 1 mol glucose
-) 1 mol glucose = 6 mol carbon dioxide
-) 1 mol carbon dioxide = 44 g carbon dioxide
For C, we have to start with the conversion from grams of glucose to moles, the moles of glucose to moles of oxygen and finally the moles of oxygen to molecules. To do this we have to take into account the <u>following conversion ratios</u>:
-) 180 g of glucose = 1 mol glucose
-) 1 mol glucose = 6 mol oxygen
-) 1 mol oxygen = 6.023x10^23 molecules of O2
Answer:
B. All of the Above
Explanation:
Sea of electrons -
This model of the metallic bonding helps in explaining the properties like , malleability , ductility ,high electrical conductivity , luster ,high thermal conductivity of the metals in solid state .
The metallic bonding is between metal atoms and the ionic bond links a metal and a non - metal together ,
In case of metallic bonding , bulk of metal atoms are joined .
hence from the question , all the given properties are correct .