Recent activity by GRZManie2225

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What is the concentration of copper sulfate in a 50 mL solution if the absorbance measured by a spectrophotometer is found to be 0.450 at a wavelength of 450 nm? The molar absorptivity of copper sulfate at this wavelength is 9.6 x 10^3 L/mol.cm.

answered 6 days ago in Analytical Chemistry

1 answer 57 views

How can the concentration of a specific substance in a sample be determined using colorimetry? Provide a detailed stepwise procedure for the same and explain the underlying principle behind it.

asked Jan 29 in Analytical Chemistry

1 answer 70 views

A chemistry student is given a sample of an unknown salt consisting of a mixture of two compounds. The student is asked to determine the percentage composition of each compound in the salt using mass balance calculations. The total mass of the sample is 10 grams, and after performing careful analysis, the student obtains the following data: One compound has a molar mass of 80 g/mol and comprises 60% of the total mass of the salt. The other compound has a molar mass of 120 g/mol and comprises 40% of the total mass of the salt. What are the percentage compositions of each compound in the salt?

asked Jan 22 in Analytical Chemistry

1 answer 25 views

When was the study on exposure therapy for anxiety disorders by Wolpe conducted?

asked Jan 20 in Psychology

1 answer 27 views

Why might systemic therapy be used for couple counselling?

asked Jan 20 in Psychology

1 answer 21 views

According to the Heuristic-Systematic Model, what are the two routes to persuasion?

asked Jan 17 in Psychology

1 answer 24 views

What is the learned helplessness theory?

answered Jan 16 in Psychology

1 answer 66 views

Define cognitive neuroscience

answered Jan 15 in Psychology

1 answer 38 views

What is internal validity?

asked Jan 14 in Psychology

1 answer 36 views

What is the role of emotion-focused coping strategies?

asked Jan 14 in Psychology

1 answer 13 views

Which blood cells serve to defend the body in various ways?

answered Jan 8 in Science

1 answer 26 views

What do we call the amount of time it will take for half of the radioactive material to decay?

asked Jan 6 in Science

1 answer 50 views

What 2 things keep polar bears warm in their arctic ecosystem?

answered Jan 2 in Science

1 answer 27 views

In science, what is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved?

asked Dec 31, 2024 in Science

1 answer 19 views

A phase diagram plots temperature and what else?

asked Dec 30, 2024 in Science

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