Answer : The mass of potassium phosphate needed will be 3.98 grams.
Explanation : Given,
Molarity of potassium phosphate = 0.75 M = 0.75 mole/L
Molar mass of potassium phosphate = 212.27 g/mole
Volume of solution = 25.0 mL = 0.025 L (conversion used : 1 L = 1000 mL)
Molarity : It is defined as the number of moles of solute present in one liter of solution.
In this problem solute is, potassium phosphate.
Formula used :
Now put all the given values in this formula, we get:
Therefore, the mass of potassium phosphate needed will be 3.98 grams.
Answer:
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Explanation:
The molar concentration of the potassium hydroxide solution was 0.815 mol/L.
<em>Balanced equation</em>: 2KOH + H_2SO_4 → K_2SO_4 + 2H_2O
<em>Moles of H_2SO_4</em>:
15.1 mL H_2SO_4 × (1.50 mmol H_2SO_4 /1 mL H_2SO_4)
= 22.65 mmol H_2SO_4
<em>Moles of KOH</em>: 22.65 mmol H_2SO_4× (2 mmol KOH/2 mmol H_2SO_4)
= 45.30 mmol KOH
<em>Concentration of KOH</em>: c= "moles"/"litres" = 45.30 mmol/55.6 mL
= 0.815 mol/L
The answer to this question is:
<span>If the observed test value of a hypothesis test is outside of the established critical value(s), a researcher would __________.
</span><span>"Claim significant support for the hypothesis"
Hoped This Helped, </span><span>
Itsalishamariee
Your Welcome :)</span>
Answer:
A.
Explanation:
It would be A. because the question is asking how the harmful chemicals have an effect on the environment. This answer also proves that even though we don't mean to harm the environment it still happens because we are using these chemicals for things in our daily life.