Answer:
Mass = 23.95 g
Explanation:
Mass of iron = 16.7 g
Mass of iron(iii) oxide formed = ?
Solution:
Chemical equation:
Fe + 3O₂ → 2Fe₂O₃
Number of moles of iron:
Number of moles = mas/ molar mass
Number of moles = 16.7 g/ 55.85 g/mol
Number of moles = 0.3 mol
Now we will compare the moles of iron and iron oxide.
Fe : Fe₂O₃
4 : 2
0.3 : 2/4×0.3 = 0.15 mol
Mass of iron(iii) oxide:
Mass = number of moles × molar mass
Mass = 0.15 mol × 159.69 g/mol
Mass = 23.95 g
Answer:
Degrees Celsius (°C)
Explanation:
Liters is for liquid, grams is for mass, and millimeters is for length
Answer:
"Accuracy refers to how close a measurement is to the true value of what is being measured. Precision refers to how close measurements of the same quantity are to each other, even if they are not close to the true value."
Explanation:
Look for the ones with the same number of protons and different neutrons number
Answer:
Endothermic reactions is the result of heat being absorbed.
Explanation:
Melting ice cubes. Melting solid salts. Evaporating liquid water. Converting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processes.
(These are all examples of endothermic reactions.)