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3241004551 [841]
2 years ago
11

Help me with this science question on the middle one..

Chemistry
1 answer:
viktelen [127]2 years ago
8 0
Networks of feeding relationships is correct
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How many milliliters of a 3.0 M HCL solution are required to make 250.0 millimeters of 1.2 M HCL?
White raven [17]
The problem above can be solved using M1V1=M2V2  where M1 is the concentration of the concentrated, V1 is the volume of the concentrated solution, M2 is the concentration of the Dilute Solution, V2 is the Volume of the dilute solution. Hence,

(3.0 M)(V2)=(250 mL)(1.2M)
V2 (3.0)= 300
V2= 100 mL

Therefore, you need 100 mL of 3.0 M HCl to form a 250 mL of 1.2 M HCl.
7 0
3 years ago
HELP !<br> 85g of NiCl2 dissolves in 350ml of H2O. What is the Molarity? Show your work
trapecia [35]

Answer:

1.874 M.

Explanation:

<em>Molarity is defined as the no. of moles of a solute per 1.0 L of the solution.</em>

<em />

M = (no. of moles of solute)/(V of the solution (L)).

<em>∴ M = (mass/molar mass)of NiCl₂/(V of the solution (L)).</em>

<em></em>

∴ M = (mass/molar mass)of NiCl₂/(V of the solution (L)) = (85.0 g / 129.59 g/mol)/(0.35 L) = 1.874 M.

7 0
3 years ago
The Galapagos Islands formed over a hot spot. The majority of the volcanoes here are ________________ volcanoes. A) shield B) ci
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I think the answer would be shield volcanoes.
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3 years ago
Phosphoric acid is neutralized by potassium hydroxide according to the following reaction:
rusak2 [61]
Balance the reaction first:

3KOH + H3PO4 —> K3PO4 + 3H2O

So for every mol of H3PO4, you need 3 mol of OH- to fully neutralize the acid, since H3PO4 is polyprotic.

0.0200 L KOH • (2.000 mol KOH / L KOH) • (1 mol H3PO4 / 3 mol KOH) = 0.0133 mol H3PO4

Divide this by the volume of H3PO4 to get the concentration.

0.0133 mol H3PO4 / 0.0250 L = 0.532 M H3PO4
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2 years ago
How can people affect the water cycle in a good way
Greeley [361]

Answer:

damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels.

Explanation:

4 0
2 years ago
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