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Chemistry

Chad

Why noble gas neon is an unreactive element?

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Chemistry

Elisha Huang

Any reaction that absorbs 150 kcal of energy can be classified as

a. activated.

b. exothermic.

c. oxidation.

d. endothermic

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Chemistry

Deborah Flores

Consider a triprotic acid like phosphoric acid or citric acid. which expression correctly describes the relative magnitudes of the three ka equilibrium constants?

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Chemistry

Armani Lin

A student used a 10 ml volumetric pipet to measure and deliver an unknown liquid to a flask for density determination. the student forced all of the liquid out of the pipet with the bulb. will the determined density of the liquid be correct, too high or too low?

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Chemistry

Diesel

How many liters of water must be added to 5.40 g of sodium nitrate to create a solution that has a concentration of 3.81 g/L?

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Chemistry

Amy Wilson

How does microorganisms affect the quality of soil

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Chemistry

Alondra Ruiz

The red lionfish (shown below) is a voracious predator of small fish, including young angelfish and parrotfish. In the Caribbean, red lionfish have no natural predators. What is the most likely long-term outcome of the introduction of lionfish to a pristine reef?

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Chemistry

Caitlyn Knight

Cryolite, Na3AlF6 (s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation for the synthesis of cryolite. equation: Al2O3 (s) + NaOH (l) + HF (g) ⟶Na3AlF6+H2O (g) If 14.0 kg of Al2O3 (s), 59.4 kg of NaOH (l), and 59.4 kg of HF (g) react completely, how many kilograms of cryolite will be produced? mass of cryolite produced: kg Na3AlF6 Which reactants will be in excess? HF Al2O3 NaOH What is the total mass of the excess reactants left over after the reaction is complete? total mass of excess reactants: kg question source: MRG - General Chemistry|publisher: University Science Books

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Chemistry

Ronin Swanson

Calculate the pH of a 2.0 M solution of HClO4?

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Chemistry

Makenzie

What type of reaction is: CaO + H2O - > Ca (OH) 2?

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Chemistry

Mayra Pittman

Which of the following is a good conductor of heat and electricity? (*hint: which is a good conductor-metal or nonmetal)

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Chemistry

Ivan Houston

Household baking soda has the chemical formula NaHCO 3. Name the elements in baking soda. Use the Periodic Table (given in last lesson) if necessary: chlorine nitrogen hydrogen helium carbon oxygen sodium

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Chemistry

Francis Pruitt

Complete combustion of 5.80 g of a hydrocarbon produced 18.6 g of CO2 and 6.36 g of H2O. What is the empirical formula for the hydrocarbon?

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Chemistry

Ahmad Lara

How to determine which step is the slow step in a reaction?

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Chemistry

Lamar Mercer

Write the chemical formulas and names of the binary acids and oxoacids that contain Group 7A elements. Do the same for elements in Groups 3A, 4A, 5A, and 6A.

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