Molar mass NaCl = 58.44 g/mol
number of moles
1 mole ------ 58.44 g
? moles ----- 25 g
25 x 1 / 58.44 => 0.4277 moles
Therefore:
M = n / V
M =0.4277 / 1.5
M = 0.285 mol/L
Answer:
CH2.
Explanation:
The mass of C in the CO2 = 2.49 * 12/(12+32) = 0.6791 g
The mass of Hydrogen in the water = 2 * 1.008 / (2.016 + 16) = 0.1119 g.
Ratio of H to O is 0.1119/ 1.008 : 0.6791/12
= 0.111 : 0.0566
= 2 : 1
The empirical formula is CH2
Metals are placed in one spot,the nonmetals are placed in another spot,And lastly the metalloids are seperated