this would be the best one to use
hope this helps :)
6000 that should be the answer if u are doing it by thousands
Answer:
0.067M H3PO4
Explanation:
H3PO4 reacts with NaOH as follows:
H3PO4 + 3NaOH → 3H2O + Na3PO4
<em>Where 1 mole of H3PO4 reacts with 3 moles of NaOH</em>
To solve trhis question we need to find the moles of NaOH required. With the chemical equation we can find the moles of H3PO4 and its concentration as follows:
<em>Moles NaOH:</em>
50.0mL = 0.0500L * (0.20moles /L) = 0.0100 moles NaOH
<em>Moles H3PO4: </em>
0.0100 moles NaOH * (1mol H3PO4 / 3mol NaOH) = 0.00333 moles H3PO4
<em>Concentration:</em>
0.00333 moles H3PO4 / 0.0500L = 0.067M H3PO4
The electronegativity generally increases as you go from left to right across the periodic table. It decreases as you go down the periodic table. So the answer is nitrogen.