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M=238g/mol
b) Ti + O2 ---------> TiO2
m = (48+2*16)g = 80g
1 mol ---------> 80 g
x ---------> 87g
x=1,0875 mola
c)m=(16 +14)g = 30g
7,31 •10^22 cz. NO ----------> x
6,02 *10^23 cz. NO ----------> 30 g
x= 36,43 * 10^-1= 3,643g
d)mN2 = 2 *14g = 28g
72,3 g N2--------> 22,4 dm^3
28 g N2 ----------> x
x= 8,7 dm^3
2. 0,32 g He -------> x
4 g He --------> 6,02 * 10^23 at He
x = 0,4816 * 10^23 at He
0,4816 * 10^23 at ------------------> y
6,02 * 10^23 at ------------------> 31 g
y = 2,48 g