How Many Grams of CO2 from 8.8 Moles of ZnCO3?

Let's examine the thermal decomposition of zinc carbonate.This reaction requires heat to proceed.When zinc carbonate decomposes, it breaks down into zinc oxide and carbon dioxide.This is a one-to-one relationship, meaning one mole of zinc carbonate produces one mole of carbon dioxide.Therefore, when we start with eight point eight moles of zinc carbonate...We will produce exactly eight point eight moles of carbon dioxide.Notice that our equation is balanced, with equal numbers of each atom on both sides.Now that we understand the equation and molar relationships, we can move on to mass calculations.To find the mass of CO2 produced, we need to calculate its molar mass using the periodic table.Carbon dioxide consists of one carbon atom and two oxygen atoms.Let's calculate the molar mass step by step.First, carbon contributes twelve point zero one grams per mole.Two oxygen atoms contribute thirty-two point zero zero grams per mole.Adding these together gives us a total molar mass of forty-four point zero one grams per mole.Now we can convert eight point eight moles of CO2 to grams.We multiply eight point eight moles by the molar mass of forty-four point zero one grams per mole.This gives us three hundred eighty-seven point two eight eight grams of carbon dioxide.Now let's perform our final calculation using the moles of CO2 and its molar mass.Before we accept our calculated value of 387.288 grams, we need to consider significant figures.In our calculation, eight point eight has two significant figures, while forty-four point zero one has four significant figures.Our final answer must have the same number of significant figures as the least precise measurement, which is two.Let's round our result step by step.First, we round three eight seven point two eight eight to three eight seven point three.Then, to get to two significant figures, we round to three nine zero.Therefore, our final answer is three hundred ninety grams of carbon dioxide.Let's review the key points about significant figures and rounding in chemical calculations.Remember to always consider significant figures, round to the least precise measurement, and include units in your final answer.Thanks for learning about chemical calculations and significant figures with Spark.E!