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:
it's easy u just have to put them in a calculator the way they are it will give you your answer atleast I think so hope this helps
True becuase the substance changed into another substance which is a example of a chemical reaction.
Br
Se
As
Ge
Ga
Rb
Elements in the top right corner of the periodic table have the highest electronegativity. Elements on the right side have a higher electronegativity than those on the left, same with the ones on the top in comparison to those on the bottom.
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