How much Cu2S is needed to make 255.0 g Cu?

What mass of slaked lime is needed to decompose 10 g of ammonium chloride to give 100% yield? Ca (OH) 2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 400 mL more water to it? A. 0.03 molar B. 0.13 molar C. 0.23 molar D. 0.33 molar

You notice that two brothers have the same eye color. You are describing their genotype phenotype genetic makeup

In Europe, nutritional information is given in kilojoules (kJ) instead of nutritional calories (1 nutritional calorie = 1 kcal).

What does "naked" DNA mean? What kinds of organisms have "naked" DNA?

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.

Which of the following solutions contains the largest total concentration of ions, assuming complete dissociation .010 M aluminum chloride .010M sodium chloride .010M aluminum sulfate .010M calcium chloride

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.

Choose all that apply: Living organisms use atoms from sugar molecules combined with other elements to form: Question 9 options: Lipids Metals Nonmetal atoms Nucleic Acids

12.5ml of 2.0m NaOH neutralizes 10ml og HCL, what is the acid concentration