Describe some ways you could keep ice from melting over a long period of time?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

Precision can be defined as the o exact center of a data set. o reproducibility of a measured value. o correlation between two variables that are measured in a data set agreement between a measured value and an accepted value.