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Select the correct formula for a compound formed from barium and nitrogen

To convert 3.6 ng to mL, which of the following sets of conversion factors would be possible to use?

(SLO #2) A hydrate is a chemical compound that contains small amounts of water that are chemically bound to the crystal. These compounds are typically ionic salts, and the water bound to them is referred to as the water of hydration. The water molecules can be easily removed by heating the hydrate. This produces a dry (anhydrous) form of the ionic compound. For example, copper(II) chloride dihydrate (CuCl2 ∙ 2H2O) is converted to anhydrous copper(II) chloride (CuCl2) if heated to about 110°C: CuCl2 ∙ 2H2O (s) → CuCl2 (s) + 2H2O (g)   A student was given a sample of copper(II) chloride dihydrate. She weighed the sample in a dry covered porcelain crucible and obtained a mass of 25.47 g for the crucible, cover, and hydrated sample. The mass of the empty crucible and cover had been found earlier to be 23.78 g. She then heated the crucible to drive off the water of hydration, keeping the crucible at red heat for at least 15 minutes with the cover slightly ajar. On cooling, she found the mass of the crucible, cover, and its anhydrous contents to be 25.11 g. The following table does not need to be filled in (table not graded), but is here to help you organize your thoughts similar to our lab:   Mass of the crucible and cover   Mass of the crucible, cover, and hydrate   Mass of the crucible, cover, and anhydrous salt   Mass of the solid hydrate   Mass of the anhydrous salt   Mass of H2O lost after heating     From the information given, what is the mass of water in the hydrate?

(3 points) What are the coefficients of the balanced chemical equation for the reaction between methane (CH4) and oxygen gas (O2) reacting and producing methanol (CH3OH)? (You may want to write out the chemical equation yourself).

Which of the following would happen as you climb a tall mountain?

(3 points) Which is the correct lewis structure for HCN? (let me know if these answer choice images do not load)

When 1 mole of Na3PO4 is dissolved in water, which of the following would be true?

Consider the following compounds when answering questions 43 – 46: (Let me know if the image does not load) What intermolecular force(s) can methanal (above on left) form?

(SLO #4) Which of the choices below would represent the sequence of correct names for the following compounds? Co3P2; N2O5; PCl3; Na2SO3

Which of the following compounds would have the general formula, M3X2?