Answer:
Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.
Explanation:
Answer:
since the movie was unlisted, i'm unable to provide you with a proper answer? sorry
Explanation:
Answer: option A
Explanation: Organic chemistry deals with the study of carbon and hydrogen containing compounds, drugs and pharmaceuticals etc.
If an atom is neutrally charged, then it has the same number of protons and electrones. When the atom loses one or more electrones, the protons are more than the electrones and the atom becomes a positively charged ion.
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