Questions by RaymonLamar7

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1 answer 34 views

Calculate the amount of heat required to sublimate 10 grams of dry ice (solid carbon dioxide) at a temperature of -78.5°C. The heat of sublimation of carbon dioxide is 25.2 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 36 views

A chemistry student wants to measure the rate of a chemical reaction. The reaction involves the reaction between zinc and hydrochloric acid. The student weighed out 0.5 grams of zinc and mixed it with 50 mL of 0.5 M hydrochloric acid. The student measured the time it took for the reaction to complete and found it took 3 minutes to produce all the hydrogen gas. Calculate the rate of the reaction in grams of zinc per minute.

asked Jan 22 in Chemical reactions

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1 answer 27 views

A certain polymerization reaction has a ΔH°rxn of -250 kJ/mol. If you need to make 500 grams of the polymer, how much energy in kilojoules will be released or absorbed during the reaction?

asked Jan 22 in ThermoChemistry

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1 answer 5 views

Consider two organic compounds with the molecular formula C5H10, one of which is a cyclic alkene and the other one is an acyclic alkene. Both of them exhibit positional isomerism as well. Identify the two compounds and draw their structural formulas.

asked Jan 21 in Organic Chemistry

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1 answer 41 views

When appraising the face validity of a test, what is being assessed?

asked Jan 16 in Psychology

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1 answer 17 views

Compare the use of sedatives and hypnotics in treating sleep disorders.

asked Jan 16 in Psychology

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1 answer 19 views

What is a mediating variable?

asked Jan 14 in Psychology

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1 answer 7 views

What term is used to describe when a liquid is the temperature at which its equilibrium vapor pressure is equal to the pressure exerted on the liquid by its gaseous surroundings?

asked Jan 8 in Science

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1 answer 31 views

What term describes the application of knowledge to real-world problems and is practiced by engineers?

asked Jan 7 in Science

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1 answer 20 views

The process in which animals use visual cues to communicate is known as what?

asked Jan 2 in Science

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1 answer 26 views

Arthropods change into the adult form in a process called what?

asked Dec 30, 2024 in Science

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1 answer 20 views

What is the largest and most complex algae

asked Dec 27, 2024 in Science

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