Be sure to answer all parts. label the reactants and products, and indicate how many atoms of each type of element are present on each side of the following equations. a. 2 h2o2(aq) → 2 h2o(l) + o2(g) b. 2 c8h18 + 25 o2 → 16 co2 + 18 h2oc. 2 na3po4(aq) + 3 mgcl2(aq) → mg3(po4)2(s) + 6 nacl(aq)

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

How does the viscosity of magma change as magma cools?