Questions by BuckForro541

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1 answer 53 views

What is the concentration of a hydrochloric acid solution if 25 ml of the solution requires 18 ml of a 0.1 M sodium hydroxide solution for complete neutralization during a titration?

asked 6 days ago in Analytical Chemistry

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1 answer 43 views

How can the concentration of heavy metals (such as lead, mercury, arsenic) in a water sample be accurately quantified using atomic absorption spectroscopy, and how can this data be used to determine if the sample is safe for consumption according to regulatory guidelines?

asked Jan 29 in Analytical Chemistry

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1 answer 44 views

A student needs to determine the enthalpy change of a chemical reaction using the Hess's Law equation. They have the following information:- The enthalpy change for Reaction 1 is -210 kJ/mol- The enthalpy change for Reaction 2 is -325 kJ/mol- The enthalpy change for Reaction 3 is 155 kJ/molThe student needs to use Hess's Law to calculate the enthalpy change for the following reaction:4A + 3B → 2CGiven the information above, what is the enthalpy change for the reaction?

asked Jan 22 in Chemical reactions

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1 answer 66 views

A chemistry student is given an unknown compound and asked to identify it using mass spectrometry. The mass spectrum of the compound shows a molecular ion peak at m/z 150, a base peak at m/z 135, and a few smaller peaks at m/z 91, 77, and 65. What is the possible molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry

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1 answer 40 views

A chemistry student is asked to determine the effect of temperature and pressure on the equilibrium of the reaction: 2NO2(g) ⇋ N2O4(g) using Le Chatelier’s principle. The initial concentration of NO2(g) is 0.5 mol/L and the reaction is carried out at 25°C. How will the equilibrium shift if the temperature is increased to 100°C and the pressure is decreased to 0.5 atm?

asked Jan 22 in Chemical reactions

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1 answer 5 views

Why is social desirability bias a concern in research?

asked Jan 20 in Psychology

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1 answer 4 views

What is the dopamine reward circuit?

asked Jan 17 in Psychology

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1 answer 29 views

Which theory of personality focusses on the unconscious mind?

asked Jan 15 in Psychology

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1 answer 9 views

What is self-actualisation?

asked Jan 10 in Psychology

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1 answer 6 views

Which system consists of all the nervous tissue that lies outside the central nervous system?

asked Jan 8 in Science

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1 answer 32 views

What keeps the moon orbiting earth?

asked Jan 7 in Science

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1 answer 23 views

What is found at the top of the stamen?

asked Jan 6 in Science

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1 answer 30 views

When resources become limiting, populations follow a logistic growth curve in which the size will level off at a point called what?

asked Dec 27, 2024 in Science

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1 answer 27 views

What kind of anatomical structure consists of several types of tissues that together carry out particular functions?

asked Dec 27, 2024 in Science

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