Answer:
15.52 kj 
Explanation:
H2 O   mole wt ~ 18 gm 
6.35 gm   is    6.35 gm /18 gm/mole  = .353 moles of H2O
.353 moles * 44 kj/mole = 
 
        
             
        
        
        
Answer:
50000 dollars or 5 e5
Explanation:
Mr. Garibay has  dollars in his bank.
 dollars in his bank. 
Scientific notation represents the data in the format of expanded number or with e character. 
For instance, 5.0 * 10^4 dollars = 50000 dollars or 5 e5
 
        
             
        
        
        
The people of Finland, who are secluded to some degree from the rest of the world by water, develop certain diseases due to the lack of genetic material from other ethnicities and races.
Physical barriers prevent fish from one stream from mating with fish from another stream, leading to a less varied gene pool among those fish. As time passes, the fish become unable to successfully mate with other groups.
A mountain range prevents two types of goat from mating, causing the gene pool to become less varied.<span>
</span>
        
             
        
        
        
Answer : The correct option is, (C) 0.675 M
Explanation :
Using neutralization law,

where,
 = concentration of
 = concentration of  = 13.5 M
 = 13.5 M
 = concentration of diluted solution = ?
 = concentration of diluted solution = ?
 = volume of
 = volume of  = 25.0 ml  = 0.0250 L
 = 25.0 ml  = 0.0250 L
conversion used : (1 L = 1000 mL)
 = volume of diluted solution = 0.500 L
 = volume of diluted solution = 0.500 L
Now put all the given values in the above law, we get the concentration of the diluted solution.


Therefore, the concentration of the diluted solution is 0.675 M
 
        
             
        
        
        
Answer : The percent by mass of the solution is 7.81 %
Explanation : Given,
Mass of NaCl = 8.75 g
Mass of solution = 112.0 g
Now we have to determine the percent by mass of the solution.

Putting values in above equation, we get:

Therefore, the percent by mass of the solution is 7.81 %