The unit of concentration in all the data is M. That is molarity or number of moles of solute per liter of solution.
The amount of sample or volume does not varies the concentration of the solution.
Then you only must compare the molarities and the greater the molarity (moles/liter) the greater the concentration or the more is concentrated the solution.
In this case the order is 0.90 M < 1.00 M < 1.45 M < 2.00 M.
And so, we get to the conclusion that the option C. is the most concentrated solution: 800 mL of 2.00 HCl.
Answer: Spectator ions are removed
Explanation:
Answer:
Mass of lead, m = 687 g
Explanation:
The expression for the calculation of the enthalpy change of a process is shown below as:-
Where,
is the enthalpy change
m is the mass
C is the specific heat capacity
is the temperature change
Thus, given that:-
Mass = ?
Specific heat = 0.0380 cal/g°C
Heat added = 47.0 calories
So,
Mass of lead, m = 687 g
Answer:
Group 7 or the Halogens
Explanation:
The halogens occupies the 7th group on the periodic table. The group is made of F, Cl , Br, I and At.
The elements in this group are the most reactive of all elements. They are very reactive because they have just 7 electrons in their outermost shell and they only require an electron to complete their electronic configuration to produce an octet which typically mimics the stable group VIII elements.
This makes them very highly reactive.