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Questions in chemistry

[Done] [tex]H_2SO_4 + 2NH_3 \rightarrow (NH_4)_2SO_4[/tex] What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?

[Done] Describe a procedure to separate a mixture of sugar, black pepper, and pebbles.

[Done] A diorama is a type of model. Marcy built a diorama of a forest. She put small models of trees, birds, and deer in the diorama. She also put rocks and moss on the bottom of her diorama. What does her diorama represent? A. a museum display B. an ecosystem C. an animal D. distances across Earth's surface

[Done] How does the chemical structure of a paper towel differ from that of potatoes?

[Done] What concentration of [tex] \text{SO}_3^{2-} [/tex] is in equilibrium with [tex] \text{Ag}_2\text{SO}_3 \text{(s)} [/tex] and [tex] 3.60 \times 10^{-3} \, \text{M} \, \text{Ag} [/tex]? The [tex] K_{sp} [/tex] of [tex] \text{Ag}_2\text{SO}_3 [/tex] is [tex] 1.5 \times 10^{-14} [/tex].

[Done] Chlorine has two naturally occurring isotopes, Cl-35 and Cl-37. The atomic mass of chlorine is 35.45. Which of these two isotopes of chlorine is more abundant?

[Done] Explain the relationship between chemical bonds and energy in the body.

[Done] What kind of mistake has a scientist made if he accidentally spills a chemical that causes invalid conclusions? Is it an honest mistake or a biased mistake?

[Done] Which of the following solutions has the highest pH? Can you also explain how to determine if a solution has the highest pH? a) 1.00 mol/L HNO3 (aq) b) 1.00 mol/L KOH (aq) c) 1.00 mol/L NaCl (aq) d) 1.00 mol/L CaCl2 (aq) At equal concentrations, which of the following solutions is the most conductive? a) C6H12O6 (aq) b) CH3COOH (aq) c) HClO4 (aq) d) CH3OH (aq)

[Done] A compound has 39 g of potassium and 78 g of selenium. What is the mass ratio of potassium to selenium in the compound?