Which best describes a compound such as magnesium oxide?

Chemistry

2 answers:

Rina8888 [55]3 years ago

5 0

Answer:

Explanation:

a pure substance that is made up of different elements

KatRina [158]3 years ago

4 0

<span>magnesium oxide is a compound that is composed of one atom of magnesium and two atoms of oxygen. The compound is a combination of Mg2+ ion and O2-. The ions translate into atoms which reflects on the subscripst of the elements already. magnesium oxide is a basic oxide with the pH level greater than 7.</span>

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For the following reaction if you have 13.2g of CO and 42.7g of Fe2O3, which is the limiting reagent with regards to the Fe prod

MrRissso [65]

Answer: CO is a limiting reagent with regards to the Fe production.

Explanation:

$Fe_2O_3(s)+3CO(g)\rightarrow 2Fe(s)+3CO_2(g)$

Moles of CO = $\frac{\text{mass of CO}}{\text{molar mass of CO}}=\frac{13.2 g}{28 g/mol}=0.4714 mol$

moles of $Fe_2O_3=\frac{\text{mass of} Fe_2O_3}{\text{molar mass of}Fe_2O_3}=\frac{42.7 g g}{159.7 g/mol}=0.2673 mol$

According to reaction , 3 mole of CO reacts with 1 mole of $Fe_2O_3$ then , 0.4714 moles of CO will react with : $\frac{1}{3}\times 0.4714$ moles of $Fe_2O_3$ that is 0.1571 moles.