Answer:
Comprehensive Two-dimensional gas chromatography, or GCxGC is a multidimensional gas
<span>This type of expansion can occur either in a hot or cold universe, under the right ... but not ordinary atomic matter made from electrically neutral atoms.</span>
Buffer is formed from weak acid and its salt with strong base (its conjugate base)
So the only one correct answer is :
0.2 M H₃PO₄ and 0.2 M NaH₂PO₄
While all other choices are incorrect
Ill try to help you find the answer
