Recent activity by ThedaLabarbe

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Question: A chemistry student wants to determine the concentration of copper (II) ions in a water sample. The student has access to a UV-Vis spectrophotometer and a copper (II) sulfate standard solution. Outline the steps the student should take to quantify the concentration of copper (II) ions in the water.

asked Jan 30 in Analytical Chemistry

1 answer 42 views

Calculate the enthalpy of formation of carbon dioxide given the following data:C(s) + O2(g) → CO2(g) ΔH° = -393.5 kJ/molC(s) + 2H2(g) → CH4(g) ΔH° = -74.8 kJ/mol2H2(g) + O2(g) → 2H2O(l) ΔH° = -571.6 kJ/mol

asked Jan 23 in ThermoChemistry

1 answer 32 views

Who formulated the concept of isomorphism?

asked Jan 20 in Psychology

1 answer 34 views

What is the triad of OCD?

asked Jan 15 in Psychology

1 answer 62 views

When do we perceive texture gradients?

asked Jan 15 in Psychology

1 answer 35 views

What is the 'hierarchy of needs'?

asked Jan 13 in Psychology

1 answer 19 views

Who is the father of interpersonal psychology?

answered Jan 13 in Psychology

1 answer 57 views

When cats mark their territory by rubbing their face against an object, they deposit chemicals released by what structures?

asked Jan 8 in Science

1 answer 29 views

What will you see if you look at a star through a prism?

answered Jan 8 in Science

1 answer 45 views

What is the number of electrons equal to in every electrically neutral atom?

asked Jan 7 in Science

1 answer 39 views

The majority of solids are what in nature?

answered Jan 2 in Science

1 answer 56 views

Reasoning can be broken down into two categories: deduction and?

answered Dec 31, 2024 in Science

1 answer 35 views

Dispersal occurs only on what time scale?

asked Dec 27, 2024 in Science

1 answer 52 views

What step, involving placement of a substance on the stigma, precedes fertilization?

answered Dec 27, 2024 in Science

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