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Diano4ka-milaya [45]
2 years ago
14

Please help fast. I will give brainliest.

Chemistry
1 answer:
Sonbull [250]2 years ago
5 0

Answer:39 min

Explanation:

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A 20.0-milliliter sample of HCl(aq) is completely neutralized by 32.0 milliliters of 0.50 M KOH(aq).
salantis [7]
You can use the formula M1 x V1 = M2 x V2 where M1 is the molarity of the first substance and V1 is the volume of the substance. M2 is the molarity of the 2nd substance and V2 is the volume of the substance

if substance 1 is HCl and 2 is KOH we can set up the following equation

x moles / liter (unknown) x .02 liters = .5 moles/ liter x .032 liters

x moles / liter x .02 liters = .016 moles

x moles / liter = .016/.02 liters

x moles / liter = .8 moles/ liter
 
You have . 8M HCL 

3 0
3 years ago
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which of the following will stay consant, no matter if the substance is in the solid, liquid, or gas state​
777dan777 [17]

Answer:

chemical composition

Explanation:

changes into any state of matter are physical and thus the chemical composition of the matter is unaltered

8 0
3 years ago
Value of MA is always lesser thàn 1 why?​
Degger [83]

Answer:

because the load arm is greater than the effort arm. As we know that when the load arm is greater than the effort arm, the mechanical advantage will always be lesser than one, which results in gain in speed

3 0
2 years ago
Keiko needs 100mL of a 5% acid solution for a science experiment. She has available a 1% solution and a 6% solution. How many mi
4vir4ik [10]

Answer:

Keiko should mix 20 mL 1% solution and 80 mL 6% solution for to make 100 mL 5% solution

Explanation:

There are 2 unknown values X= mL 6% solution and Y=1% solution. So, we need 2 equations:

1. Equation acid concentration. X mL 6% + Y mL 1% = 100 mL 5%

2. Equation solvent concentration X mL 94% + Y mL 99% = 100 mL 95%

When clearing X and Y :

(X mL 6%    +   Y mL 1%      =    100 mL 5%) (-15,7)

X mL 94%  +   Y mL 99%   =   100 mL 95%

_______________________________

 -                      Y  0.83       =   16.5

                        Y                =   19.9 mL 1% solution

Replace Y in anyone equation and X = 80 mL 6% solution

I hope to see been helpful

7 0
3 years ago
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A stream leaving a mountain range deposits a large part of its load in a(n): alluvial fan sandbar meander sand dune
pshichka [43]

the answer to you question is alluvial fan

3 0
3 years ago
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