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trasher [3.6K]
4 years ago
11

A 225. mL sample 3.5M solution of KBr is diluted to a final volume of 750. mL. What is the final concentration of this solution?

please show the steps
Chemistry
1 answer:
Allushta [10]4 years ago
7 0
C= comcentration
V= volume
C1*V1=C2*V2
3.5M*225.mL = xM*750 mL
x=(3.5*225/750) =1.05M≈1.1M
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What is the number of millimoles of H+ in 1.653 mmol of oxalic acid dehydrate?Remember that oxalic acid is diprotic.
Anastaziya [24]

Answer: 3.306 mmol

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

Molarity

n= moles of solute  

V_s = volume of solution in ml

C_2O_4H_2.2H_2O\rightarrow C_2O_4^{2-}+2H^++2H_2O

According to stoichiometry:

1 mole of C_2O_4H_2 gives 2 moles of H^+

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4 0
4 years ago
When the following equation is balanced, the coefficient of Al is ___ Al (s) + H20 (1) - Al(OH)3 (s) + H2 (g) A) 4 B) 1 C) 5 D)
Salsk061 [2.6K]

<u>Answer:</u> The correct answer is Option E.

<u>Explanation:</u>

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This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical equation for the reaction of aluminium and water follows:

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The coefficient of Aluminium is 2.

Hence, the correct answer is Option E.

7 0
3 years ago
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