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Questions in chemistry

📝 Answered - How would you prepare 1.00 L of a 0.400 M solution of copper(II) sulfate, CuSO\(_4\)?

📝 Answered - The molar mass of calcium is 40.08, oxygen is 16.0, and hydrogen is 1.01. What is the mass of one mole of calcium hydroxide [tex](\text{Ca(OH)}_2)[/tex]?

📝 Answered - How many molecules are found in 0.589 moles of [tex]$N_2$[/tex]?

📝 Answered - The solubility of barium carbonate, BaCO₃, is 0.0100 g/L. Its molar mass is 197.3 g/mol. What is the Ksp of barium carbonate?

📝 Answered - Water molecules attract one another to form what kind of bonds?

📝 Answered - Similar organisms that are not related are an example of: A. Natural selection B. Convergent evolution C. Divergent evolution D. Common ancestor

📝 Answered - How many moles are present in a 24.5 gram sample of [tex]K_2Cr_2O_7[/tex]?

📝 Answered - Hess's law ____. A. makes it possible to calculate [tex]\Delta H[/tex] for complicated chemical reactions B. states that when you reverse a chemical equation, the sign of [tex]\Delta H[/tex] does not change C. determines the way a calorimeter works D. describes the vaporization of solids

📝 Answered - The mass of 2 cm\(^3\) of gold is 38.6 grams. Find the density of the gold.

📝 Answered - What volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia? \[ \text{Reaction:} \quad N_2 + 3H_2 \rightarrow 2NH_3 \]