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Moriah Whitney
ChemistryChemistry
What ionic bond occurs between what particles?

A. Two Negative Ions

B. A positive and negative ion

C. Two positive ions

D. Two neutral atoms
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Moriah Whitney
ChemistryChemistry
Which of the following are good traits of a hypothesis? it will be able to be tested

it can predict an outcome

it will explain the observations

all of these
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Broderick Harvey
ChemistryChemistry
What is the mass of a box of nails
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Fisher Sanford
ChemistryChemistry
In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A. 315g of water vapor was produced. B. 17.5 g of water vapor was producedC. 17.5 mol of water vapor was produced. D. 17.5 mol of liquid water was produced. E. 17.5 g of liquid water was produced.
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Janelle Sanchez
ChemistryChemistry
Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.

Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy
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Bentley Clay
ChemistryChemistry
How many Joules are equivalent to 75 Calories?
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Fernanda Stein
ChemistryChemistry
How do you balance nuclear equations?
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Gates
ChemistryChemistry
Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction
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Camron Carey
ChemistryChemistry
How do the relative concentrations of hydronium ions and hydroxide ions compare in acidic solution?
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Julissa Mcclure
ChemistryChemistry
Give the name of the orange metal visable after one week
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Leo Briggs
ChemistryChemistry
What is the rough er connected to
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Christine Snow
ChemistryChemistry
Two students design an experiment to see if pushing or pulling a box across the floor is more effective. The first student pushes the box across the floor a distance of 20 feet and the second student times how long it takes. Next they switch roles and the second student pulls the same box across the floor instead of pushing. They repeat this 5 times. Which statement best describes the design of this experiment? A) This is a well design experiment. B) This experiment is not well design because 20 feet is too long a distance. C) This experiment is not well design because they should not repeat it 5 times. D) This experiment is not well design because they should not switch roles during the experiment.
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Bossy
ChemistryChemistry
15.00 g of NH4HS (s) is introduced into a 500. mL flask at 25 °C, the flask is sealed, and the system is allowed to reach equilibrium. What is the partial pressure of ammonia in this flask if Kp = 0.108 at 25 °C for: NH4HS (s) ⇄ NH3 (g) + H2S (g) ?
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Guest
ChemistryChemistry
Among elements 1-18, which element or elements have the smallest effective nuclear charge if we use the equation zeff=z-s to calculate zeff? check all that apply.
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Woodard
ChemistryChemistry
Two clear solutions are placed in separate beakers. The first solution has a pH of 4, and the pH of the second solution is unknown. If the two solutions are mixed and the resulting pH is 5, the second solution must have
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