Answer:
they are non metals and all hollagens gain one single electron to fill their valence energy level and all of them form an anion with one single negative charge. so i believe the answer is true
Explanation:
Answer:
i'm going to say it 2 or 4
Explanation:
here is your anserw please let me know if it was right
Answer
The four steps of the scientific method are:
1) Observation and description of a natural phenomenon of group of phenomena;
2) Formulation of a hypothesis to explain the phenomena;
3) Use of the hypothesis to predict the existence of other phenomena or to predict quantitatively the results of new observations, i.e to test the hypothesis if the hypothesis is true, find more evidence or find counter-evidence, if the hypothesis is false, create a new hypothesis or try again; and
4) Draw conclusions and repeat –the scientific method is never-ending, and no result is ever considered perfect.
Answer:
B. The [H1+] >[OH1-] and the solution is acidic
Answer:
8.82 gm of Pb
Explanation:
Question
calculate the Mass of lead that will be deposited from an aqueous solution of lead(2)salt by the same quantity of electricity that deposit 2.7 g of copper from an aqueous solution of copper (2)saltSince the oxidation# of the Pb and the Cu is the same, we know that the same amount of electricity that will deposit 1 mole of Cu will deposit 1 mole of Pb
2.7 gm of Cu were deposited
the atomic mass of Cu = 63.5
the number of moles of Cu deposited was 2.7/63.5 = 0.0425 moles
so 0.0425 moles of Pb will be deposited.
The atomic mas of Pb is 207.2
0.0425 mole of Pb weigh 0.0425 X 207.2 =
8.82 gm of Pb