Question

2 what are the products? cuco3(s)→cuo(s)+co2(g) 123.6 g 79.6 g + 44.0 g what is the value of x in grams? numeric 20 points multiple choice 20 points cuco3(s) cuo(s)+co2(g) unable to tell co2(g)

Explanation:

Step1: Identify the chemical reaction

The reaction is $\mathrm{CuCO_3}(s)
ightarrow\mathrm{CuO}(s)+\mathrm{CO_2}(g)$.

Step2: Analyze mass - conservation

The molar mass of $\mathrm{CuCO_3}$ is approximately 123.6 g/mol, the molar mass of $\mathrm{CuO}$ is approximately 79.6 g/mol and the molar mass of $\mathrm{CO_2}$ is approximately 44.0 g/mol. According to the law of conservation of mass in a chemical reaction, when 123.6 g of $\mathrm{CuCO_3}$ decomposes, it forms 79.6 g of $\mathrm{CuO}$ and 44.0 g of $\mathrm{CO_2}$.

Answer:

The products of the decomposition of $\mathrm{CuCO_3}(s)$ are $\mathrm{CuO}(s)$ and $\mathrm{CO_2}(g)$ which is consistent with the given reaction and mass - values. For the question about the value of X, since no X is clearly defined in the context provided in a calculable way from the given reaction and data, it's unclear what X is referring to. But if we assume X is related to the mass of a product, based on the reaction $\mathrm{CuCO_3}(s)
ightarrow\mathrm{CuO}(s)+\mathrm{CO_2}(g)$, when 123.6 g of $\mathrm{CuCO_3}$ decomposes, 44.0 g of $\mathrm{CO_2}$ and 79.6 g of $\mathrm{CuO}$ are formed. If we had to pick one of the masses given as a possible value for an undefined X related to the products, it could be either 44.0 g (mass of $\mathrm{CO_2}$) or 79.6 g (mass of $\mathrm{CuO}$) depending on what X represents. But without clear definition of X, we can't give a definite single - valued answer.