The tree outside my window is green . Is that Observation or a inference?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)

How many neutrons does an element have if its atomic number is 50 and its mass number is 166