Chemistry: 63) How many moles of CaBr 2 are in 5.0 grams of CaBr 2 2. 4.0 x 101 mol 2.5 x 10-2 mol 4.2 x 10-2 mol 1.0 x 10 mol

63) How many moles of CaBr 2 are in 5.0 grams

zacharysharpe2805

04.06.2021

I think it will be the answer

2.5 x 10-2 mol

I hope it help you

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letsgetcookingblog

05.11.2020

Percent by mass : 4.10⁺³%

Further explanation

The concentration of a solution can be expressed in units such as molarity, normality, mass percent, volume percent etc.

$\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%$

mass solute= mass of NaOH

mass of NaOH :

$\tt 0.001~mol/L\times 1~L\times 40~g/mol=0.04~g$

mass solution = 1000 g

% mass :

$\tt \dfrac{0.04}{1000}\times 100=4.10^{-3}\%$

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