Questions by Rosaline02Y

0 votes

1 answer 19 views

What is the step-by-step procedure for the preparation of 2,4-dinitrobenzoic acid from benzoic acid and nitric acid, including the required equipment and reagents, and the expected yield and purity of the product?

asked 4 days ago in Chemical synthesis

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1 answer 24 views

What is the efficiency of a photosensitizer in converting light energy to a reactive species? Provide a brief explanation of the photochemical mechanism involved.

asked 6 days ago in Physical Chemistry

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1 answer 54 views

Calculate the standard enthalpy change for the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH), given that the reaction produces water and sodium chloride as products. The molar enthalpy of formation for water is -285.8 kJ/mol and for NaCl is -411.2 kJ/mol. The balanced chemical equation for the reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

asked Feb 3 in Chemical thermodynamics

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1 answer 65 views

Calculate the enthalpy change for the oxidation of methane gas (CH4) to carbon dioxide (CO2) and water (H2O) using the following balanced chemical equation:CH4 (g) + 2O2 (g) -> CO2 (g) + 2H2O (l)The standard enthalpy of formation of methane, carbon dioxide, and water are -74.81 kJ/mol, -393.5 kJ/mol, and -285.83 kJ/mol respectively.

asked Jan 23 in ThermoChemistry

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1 answer 102 views

What is the systematic name of a cycloalkane with 10 carbon atoms?

asked Jan 21 in Organic Chemistry

0 votes

1 answer 46 views

What is the name of the theory that suggests that our behaviour can be explained by examining the functions it serves?

asked Jan 20 in Psychology

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1 answer 40 views

Where did Carl Rogers develop his person-centred approach to counselling?

asked Jan 17 in Psychology

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1 answer 41 views

What is the term used to describe the mental model used to predict the behaviour of other people?

asked Jan 15 in Psychology

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1 answer 33 views

Why is the id, ego, and superego still taught in psychology courses?

asked Jan 15 in Psychology

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1 answer 13 views

How can pain catastrophising be addressed in pain management?

asked Jan 14 in Psychology

0 votes

1 answer 47 views

What is a moderator?

asked Jan 13 in Psychology

+2 votes

1 answer 51 views

Yogurt is made from milk fermented with what type of organism?

asked Jan 8 in Science

0 votes

1 answer 65 views

What property of warm air causes it to rise above cold air?

asked Jan 7 in Science

0 votes

1 answer 24 views

What process tends to be external in aquatic species and internal in terrestrial species?

asked Jan 7 in Science

0 votes

1 answer 49 views

What leads to the buildup of electric charges on objects?

asked Jan 7 in Science

0 votes

1 answer 13 views

What is the germ for a group of atoms within a molecule that reacts similarly anywhere it appears in different compounds?

asked Jan 7 in Science

0 votes

1 answer 14 views

What is defined as a close relationship between organisms of different species in which at least one of the organisms benefits?

asked Jan 6 in Science

0 votes

1 answer 44 views

Thermal, radiant, electrical, nuclear, and chemical are all types of what?

asked Jan 2 in Science

0 votes

1 answer 12 views

The upper portion of the septum is formed by the perpendicular plate of which bone?

asked Jan 2 in Science

0 votes

1 answer 54 views

The smallest cyclic ether is called what?

asked Jan 2 in Science

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