What is the apparent motion of the sun in the sky

Is the following equation balanced? 2Na + 2H2O = 2NaOH + H2 Yes No

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In a metallic bond, electrons A. Are shared B. Are completely transferred between bonded atoms C. Move freely between the clouds of several atoms D. Move from a high energy level to a low energy within one atom

For acidic solutions, which element is added to balance half-reactions? A. hydrogen B. hydroxide C. oxygen D. nitrogen

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A reaction mixture initially contains 22.02 g Fe2O3 and 14.66 g CO. Assume that the reaction will progress to 100% completion. What mass (in g) of the excess reactant is leftover?

A cylinder at left with balls evenly spaced throughout the cylinder has an arrow leading to a cylinder at right cylinder with balls in a layer at its bottom. Which change of state is shown in the model?

Which ion was fomed by providing the second ionization to remove an electron A) ca2 + B) N3 - B) Fe3 + C) S2

A reaction was performed in which 3.7 g of benzoic acid was reacted with excess methanol to make 2.1 g of methyl benzoate. Calculate the theoretical yield and percent yield for this reaction.

According to Reference Table N, which radioactive isotope will retain only 1/8 its original radioactive atoms after approximately 43 days? A. gold-198 B. iodine-131 C. phosphorus-32 D. radon-222