Chemistry: What mass of MgO will be produced when 0.5 Moles of Mg burns in oxygen

What mass of MgO will be produced when 0.5 Moles - id0515155928, nolimitsteve3210

Ответ:

eliwas555

06.01.2022

Chemistry

2Mg + O2 = 2MgO

0,5/2 = х / 2

х = 0,5

0,5* 40 = 20g

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Ответ:

xxtonixwilsonxx

15.01.2021

Chemistry

$1\times 10^{-4}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

$pH=-\log [H^+]$

pOH=-log[OH^-]

pH+pOH=14

Given: pH= 4.0

Putting in the values in the given equation:

$4.0=-\log [H^+]$

$[H^+]=1\times 10^{-4}M$

Thus concentration of hydrogen ions [H+] in a solution of pH = 4.0 is $1\times 10^{-4}M$

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What mass of MgO will be produced when 0.5 Moles of Mg burns in oxygen

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