Answer:
Devon needs add 60 mL of 5% acid solution and 30 mL of 20% acid solution
Explanation:
It know acid and water concentration for every solution. 2 equation are proposed because there are two unknowns. V1= volume 5%acid and V2 =volume 20% acid
<em>Acid </em>V1(0.05)+V2(0.2)=90mL(0.1)
<em>Water </em>V1(0.95)+V2(0.8)=90mL(0.9)
Clearing V1 from acid equation having to: V1=180-4V2
Replacing V1 in water equation having to: (180-4V2)(095)+V2(0.8)=81
Clearing V2 = 30mL
Replacing in water equation V1(0.05)+30(0.2)=9 So, V1=60mL
I hope it helps
Answer A scientific law is a statement that describes what always happens under certain conditions in nature. An example of a scientific law is the law of gravity, which was discovered by Sir Isaac Newton. The law of gravity states that objects always fall towards Earth because of the pull of gravity.
Explanation:
Answer:
What is the real meaning of this questions
By looking at the graph, you can determine the answer is C. Na2HAsO4 and Na2SO4.
Answer:
I need the table to do the question
Explanation:
