Rust results from iron’s reaction to oxygen. An iron nail gains mass when it rusts. How does this reaction support the law of co
nservation of mass? "The mass of the rusted nail equals the mass of iron and the oxygen from the air it reacted with to form the rust." "The mass of the rusted nail increases because iron attracts more protons from the air." "The increased mass of the rusted nail is an exception to the law of conservation of mass since the rusted nail’s mass increases." "The increased mass of the rusted nail results from the rearrangement of protons and neutrons within oxygen, according to the law of conservation of mass."
<h2><u><em>When measuring data, the result often varies from the true value. Error can arise due to many different reasons that are often related to human error, but can also be due to estimations and limitations of devices used in measurement. Regardless, in cases such as these, it can be valuable to calculate the percentage error. The computation of percentage error involves the use of the absolute error, which is simply the difference between the observed and the true value.</em></u></h2>
