Answer:
The concentration of the HNO3 solution is 0.103 M
Explanation:
Step 1: Data given
Volume of the unknow HNO3 sample = 0.125 L
Volume of 0.200 M Ba(OH)2 = 32.3 mL = 0.0323 L
Step 2: The balanced equation
2HNO3(aq) + Ba(OH)2 ( aq ) ⟶ 2H2O ( l ) + Ba( NO3)2 (aq)
Step 3:
n2*C1*V1 = n1*C2*V2
⇒ n2 = the number of moles of Ba(OH)2 = 1
⇒ C1 = the concentration of HNO3 = TO BE DETERMINED
⇒ V1 = the volume of the HNO3 solution = 0.125 L
⇒ n1 = the number of moles of HNO3 = 2
⇒ C2 = the concentration of Ba(OH)2 = 0.200 M
⇒ V2 = the volume of Ba(OH)2 = 0.0323 L
1*C1 * 0.125 L = 2*0.200M * 0.0323 L
C1 = (2*0.200*0.0323)/0.125
C1 = 0.103 M
The concentration of the HNO3 solution is 0.103 M
This problem is providing the water consumption in Mexico as 88 billion m³ and the Mexican population as 127.5 million people so that the per capita daily water use is required and found to be 690 m³/person according to the following:
<h3>Dimensional analysis:</h3><h3 />
In chemistry, the use of dimensional analysis and units conversion covers a wide range of calculations, necessary to report a result in a specific way. In this case, we see this problem asks for the consumption of water, in cubic meters, that each person does every day.
Thus, with a view to calculating this, one must first write this values without any million or billion system as shown below:

This means we can get the per capita daily water use by simply dividing these two:

Learn more about dimensional analysis: brainly.com/question/10874167
Answer:
Limiting reactants
Explanation:
Because fi you slowly limit reactants it will stop eventually the reaction itself
If i am not mistaken ,
density = mass / volume
density = 7.87 g/cm3
volume = 2.5 cm3
thus ,
mass = density x volume
7.87 g/cm3 x 2.5 cm3 = 19.675 g
Probably toxins in the environment, new habitats, or changes in the food supply.
I hope this was somewhat helpful!