<span>An acetate buffer solution
Volume of Acetic Acid = 50 ml
Concentration of Acetic Acid = 0.20 M
Volume of Sodium Acetate = 50 ml 
Concentration of Sodium Acetate = 0.20 M 
Volume of NaOH = 5 mL of 0.10 M 
The correct pairing is B) Acetic acid with pH > 4.7</span>
        
             
        
        
        
Answer:
0.0375 moles HBr
Explanation:
we are given;
- Molarity of HBr solution as 0.15 M
- Volume of the solution as 250 mL
We are required to determine the number of moles;
We need to know that;
Molarity = Moles ÷ Volume 
Therefore;
Moles of HBr = Molarity of HBr solution × Volume of solution 
Thus;
Moles of HBr = 0.15 M × 0.25 L
                       = 0.0375 Moles 
Thus, the number of moles of HBr solute is 0.0375 moles 
 
        
             
        
        
        
The rate of the reaction is measurable quantity that refers to the amount or how much is are chemical substances reagents used up or converted into the product over some period of time. 
Rate = change in the amount/time. 
This can indirectly be observed through many ways, such as the volume of gas given off if the byproduct is a gas being produced, the colour of the solution etc.
        
             
        
        
        
The name is Potassium bromide.
        
                    
             
        
        
        
The fuel released 90 calories of heat.
Let suppose that water experiments an entirely <em>sensible</em> heating. Hence, the heat released by the fuel is equal to the heat <em>absorbed</em> by the water because of principle of energy conservation. The heat <em>released</em> by the fuel is expressed by the following formula:
 (1)
 (1)
Where:
 - Mass of the sample, in grams. - Mass of the sample, in grams.
 - Specific heat of water, in calories per gram-degree Celsius. - Specific heat of water, in calories per gram-degree Celsius.
 - Temperature change, in degrees Celsius. - Temperature change, in degrees Celsius.
If we know that  ,
,  and
 and  , then the heat released by the fuel is:
, then the heat released by the fuel is:

The fuel released 90 calories of heat.
We kindly invite to check this question on sensible heat: brainly.com/question/11325154