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Helena
Chemistry
This is two or more elements chemically combined in a fixed ratio.
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Catalina
Chemistry
Write balanced chemical reactions for the following a) Ammonia, NH3, reacts with nitrogen oxide, NO, to produce water and nitrogen gas. b) Oxygen gas reacts with hydrogen sulfide, H2S, to produce water and sulfur dioxide, SO2.
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Jaylynn Maldonado
Chemistry
Distinguish between acids and bases by indicating TWO general properties of acids and TWO general properties of bases. Be specific!
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Virginia Henry
Chemistry
In the redox fueling reaction, succinate + nad ↔ fumarate + nadph, the succinate molecule is undergoing which process?
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Guest
Chemistry
How are neutral atoms converted into cations
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Kenny Small
Chemistry
A chemical reaction, when more energy is released than is needed to get the reaction started, is called?
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Gemma Petty
Chemistry
What type of rock cannot be changed into a metamorphic rock?
A) sedimentary
B) igneous
C) metamorphic
D) magma
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Cheyanne Simpson
Chemistry
What is the most massive element?
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Luz Martinez
Chemistry
A liquid would boil at the lowest temperature at a pressure of
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Roderick Conway
Chemistry
The reaction 2HgO (s) ↽⇀ 2Hg (l) + O2 (g), you produce 1 mole of Hg (I). What is your percentage yield?
A) 30%
B) 20%
C) 50%
D) 100%
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Guest
Chemistry
What are the concentrations of Cu2+, NH3, and Cu (NH3) 42 + at equilibrium when 18.8 g of Cu (NO3) 2 is added to 1.0 L of a 0.800 M solution of aqueous ammonia? Assume that there is no volume change upon the addition of the solid, and that the reaction goes to completion and forms Cu (NH3) 42+.
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Douglas Sandoval
Chemistry
Estimate the optimal number of neutrons for a nucleus containing 70 protons.
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Libby Cohen
Chemistry
Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxygen equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?
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Rosemary Young
Chemistry
Which of the following properties of water allows an insect to "climb" up a tube? Capillary action Cohesion Adhesion Density
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Alex Bradley
Chemistry
What is the pOH of a solution with [OH-] = 2.0 10-2?
A. 2.00 B. - 1.70 C. 3.01 D. 1.70
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