Answer:
The answer to your question is letter c. Ca(NO₃)₂
Explanation:
Data
Ca(NO₃)₂ = 3.4 moles
Li₃PO₄ = 2.4 moles
Reaction
3 Ca(NO₃)₂ + 2 Li₃PO₄ ⇒ 6 LiNO₃ + Ca₃(PO₄)₂
Process
Calculate the proportion theoretical and experimental of reactants and compare these proportions.
Theoretical proportion
Ca(NO₃)₂ / Li₃PO₄ = = 1.5
Experimental proportion
Ca(NO₃)₂ / Li₃PO₄ =
As the experimental proportion is lower than the theoretical proportion we conclude that the amount of Li₃PO₄ increased in the experiment so the limiting reactant is Ca(NO₃)₂.
Lewis Structures of Ammonium Ion (RED) and Chloride Ions (BLUE) are attached below.
Lewis structures are those structures which shows the environment of electrons in a molecule. These structures basically depicts the bonding electrons and non-bonding electrons also known as Lone pair electrons.
In attached structure it can be seen that the ammonium ion is made when nitrogen atom is forming four single bonds with four hydrogen atoms and the formal charge on nitrogen becomes +1. While, in case of chloride ion the chlorine atom has four lone pair of electrons and has a formal charge of -1.
The formula here is:
pH = -log[H+]
3.6 = -log[H+]
[H+] = 2.51 x 10⁻⁴ mol / Liter
The first option is correct.
Answer:
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. State what steps you will take to design an experiment to test your hypothesis. Complete the experiment. Make observations. Record what happened during your experiment.
Correct me if I’m wrongs but the answer should be 21.844