when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide
what is the mass of oxygen that has combined with the copper?
how much copper must be heated to form 300 grms. of copper oxide?
To find the mass of oxygen that has combined with copper, we need to determine the difference in mass between the copper and the copper oxide formed. Let's break down the steps to find the answer:
Step 1: Find the mass of oxygen in the copper oxide formed.
Given that 80 grams of copper react to form 100 grams of copper oxide, we can subtract the mass of copper from the mass of copper oxide to find the mass of oxygen.
Mass of copper oxide - Mass of copper = Mass of oxygen
100 grams - 80 grams = 20 grams
Therefore, the mass of oxygen that has combined with copper is 20 grams.
Moving on to the second question:
To determine the amount of copper needed to form 300 grams of copper oxide, we need to calculate the amount of copper in the given mass of copper oxide.
Step 1: Find the mass of oxygen in the copper oxide.
We know from the previous question that the mass of oxygen in copper oxide is 20 grams.
Step 2: Find the mass of copper in the given amount of copper oxide.
To determine the mass of copper, we subtract the mass of oxygen from the given mass of copper oxide.
Mass of copper oxide - Mass of oxygen = Mass of copper
300 grams - 20 grams = 280 grams
Therefore, you would need to heat 280 grams of copper to form 300 grams of copper oxide.