Questions by CharlotteBal

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1 answer 52 views

How can the composition of a mixture of caffeine and aspirin be analyzed using liquid chromatography?

asked Jan 29 in Analytical Chemistry

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1 answer 46 views

Calculate the enthalpy change for the combustion of methane gas (CH4) at constant pressure, given that the standard enthalpy of formation for CH4 is -74.8 kJ/mol and the balanced chemical equation for the combustion reaction is:CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (l) The molar enthalpy of formation of CO2 is -393.5 kJ/mol and that of H2O is -285.8 kJ/mol.

asked Jan 23 in Chemical thermodynamics

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1 answer 56 views

A chemistry student was given a sample of an unknown compound. The student performed an analysis on the sample using mass balance calculations and obtained the following data: the sample had a mass of 2.64 g and contained 1.32 g of carbon, 0.22 g of hydrogen, and 0.88 g of oxygen. What is the molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry

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1 answer 16 views

According to Gibson's ecological theory of perception, what is the role of affordances in perception?

asked Jan 17 in Psychology

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1 answer 16 views

When was the behaviourist theory proposed?

asked Jan 16 in Psychology

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1 answer 26 views

What is the alternative hypothesis?

asked Jan 13 in Psychology

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1 answer 47 views

Most biochemical molecules are macromolecules, meaning that they are what?

asked Dec 31, 2024 in Science

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1 answer 25 views

Bicarbonate is the second most abundant anion in the blood. its principal function is to maintain your body’s acid-base balance by being part of these?

asked Dec 30, 2024 in Science

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