Answer:
The amount of sodium in this sample = 32.4 grams
Explanation:
Mass of Sodium = 23 g/mol
Mass of Chlorine = 35.5 g/mol
Mass of NaCl = 35.5 g/mol
Fraction of Na in NaCl = 
=0.648
We are given a sample of 50 grams of sodium chloride.
The amount of sodium in this sample = 
The amount of sodium in this sample = 
The amount of sodium in this sample = 32.4 grams
Answer:
84g Thus, 84g of KNO3 must be dissolve in 100 grams of water to form a saturated solution at 50 oC.
and 136 of KNO3 must be dissolve in 100 grams of water to form a saturated solution at 70 oC.
Explanation:
2 HCl + Ca(oh)2 ---------- CaCl2+ 2 H2O
Metals are conductors and therefore they carry high amount of electricity. Semiconductors have less electrical conductivity than metals. In metals electrons carry out the current. But in semiconductors, current is carried out by the flow of electrons of positively charged holes.
