Questions by GRXColleen50

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1 answer 52 views

Calculate the heat of crystallization for NaCl from the given data:The enthalpy of fusion of NaCl = 28.3 kJ/mol and the heat capacity of NaCl is approximately constant at 40.0 J/mol.K for temperatures close to room temperature. The melting point of NaCl is 801 °C and the density of the solid NaCl is 2.16 g/cm³.

asked Jan 23 in ThermoChemistry

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1 answer 52 views

A chemistry student wants to determine the concentration of a solution containing iron (III) ions. Using colorimetry, they measure the absorbance of the solution at a specific wavelength and plot a calibration curve with solutions of known iron (III) ion concentration. The student then measures the absorbance of their unknown solution at the same wavelength and uses the calibration curve to determine the concentration of iron (III) ions in the sample. What is the concentration of iron (III) ions in the unknown solution, in units of moles per liter?

asked Jan 22 in Analytical Chemistry

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1 answer 39 views

How does Terror Management Theory relate to end-of-life care for individuals with a strong cultural identity?

asked Jan 20 in Psychology

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1 answer 17 views

What criticisms have been lodged against social learning theory?

asked Jan 16 in Psychology

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1 answer 23 views

What is the Big Five personality theory?

asked Jan 15 in Psychology

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1 answer 17 views

When evaluating the effectiveness of cognitive behavioural therapy, what is meant by maintenance of gains?

asked Jan 15 in Psychology

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1 answer 18 views

According to Erikson, when does the trust vs. mistrust stage occur?

asked Jan 15 in Psychology

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1 answer 34 views

What is the impact of substance use on adolescent development?

asked Jan 14 in Psychology

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1 answer 23 views

What is the core assumption of the cognitive perspective?

asked Jan 13 in Psychology

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1 answer 49 views

What is extinction in behaviourism?

asked Jan 13 in Psychology

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1 answer 51 views

In contrast to precision, this term means how close a measurement is to the correct or accepted value of the quantity being measured?

asked Dec 31, 2024 in Science

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1 answer 20 views

Most tissues regulated by the autonomic nervous system receive both sympathetic and parasympathetic input from?

asked Dec 27, 2024 in Science

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