Recent activity by KrystleDHage

1 answer 41 views

How can we explain the formation and properties of common household acids and bases, such as vinegar or baking soda, using fundamental principles of chemistry?

asked Feb 20 in Chemical education

1 answer 35 views

What is the environmental impact of a petrochemical industrial plant on air quality and nearby water bodies, and how can it be mitigated using chemical waste management techniques?

answered Feb 20 in Environmental Chemistry

1 answer 22 views

What is the electronegativity difference between the oxygen atom and the hydrogen atom in a molecule of water (H2O)?

asked Feb 20 in Chemical bonding

1 answer 37 views

What is the balanced chemical equation for the synthesis of magnesium oxide?

asked Feb 17 in Chemical reactions

1 answer 32 views

What is the activation energy for the electrochemical reaction between zinc and hydrochloric acid at room temperature? Provide calculations to support your answer.

asked Feb 17 in ElectroChemistry

1 answer 65 views

What are the hybrid orbitals involved in the formation of a carbon-oxygen double bond in methanal (formaldehyde)?

answered Feb 13 in Chemical bonding

1 answer 124 views

How does the increased level of nutrients in water bodies, particularly nitrogen and phosphorus, lead to eutrophication, and what are the various effects of eutrophication on the aquatic ecosystem?

asked Feb 13 in Environmental Chemistry

1 answer 35 views

How can students learn about the real-life applications of chemistry in everyday life despite limited exposure to chemistry beyond the classroom?

answered Feb 5 in Chemical education

1 answer 16 views

Calculate the standard enthalpy change for the vaporization of 1 mole of water at 100°C and 1 atm pressure. The enthalpy of formation of liquid water is -285.8 kJ/mol and the enthalpy of formation of water vapor is -241.8 kJ/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 76 views

Calculate the standard enthalpy change for the formation of ammonia gas from nitrogen gas and hydrogen gas using Hess's Law, given the following equations and their corresponding enthalpy changes:N2(g) + 3H2(g) → 2NH3(g) ∆H = -92.4 kJ/molN2(g) → 2N(g) ∆H = 941 kJ/molH2(g) → 2H(g) ∆H = 436 kJ/mol

answered Feb 3 in ThermoChemistry

1 answer 14 views

Calculate the percent composition of phosphoric acid, H3PO4.

asked Feb 3 in Inorganic Chemistry

1 answer 103 views

What is the dipole moment of a water molecule, as calculated using ab initio methods, and how does it compare to the experimentally measured value?

asked Jan 30 in Computational Chemistry

1 answer 94 views

What is the concentration of hydrochloric acid (HCl) in a solution, given that 25 mL of this solution requires 0.10 M sodium hydroxide (NaOH) to reach the equivalence point during a titration?

answered Jan 30 in Analytical Chemistry

1 answer 88 views

Calculate the enthalpy change when 2.5 moles of methane gas is completely burned in excess oxygen gas if the enthalpy of formation of methane is -74.8 kJ/mol and the enthalpy of formation of water is -285.8 kJ/mol, and the enthalpy of formation of carbon dioxide is -393.5 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 80 views

Calculate the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l) using Hess's law given the following reactions: 2H2(g) + O2(g) → 2H2O(g) ΔH1 = -483.6 kJ/mol 2H2O(g) → 2H2O(l) ΔH2 = -40.7 kJ/mol

asked Jan 23 in ThermoChemistry

1 answer 86 views

A chemistry student needs to analyze the composition of a soil sample using elemental analysis. The student has to determine the percentage of carbon, nitrogen, and sulfur present in the sample. How can the student perform elemental analysis and calculate the percentage of each element in the soil sample accurately?

asked Jan 22 in Analytical Chemistry

1 answer 42 views

What is the two-factor theory of anxiety?

answered Jan 20 in Psychology

1 answer 78 views

Why did the Stanford Prison Experiment have to be terminated prematurely?

asked Jan 20 in Psychology

1 answer 104 views

When did the attachment theory gain popularity?

answered Jan 20 in Psychology

1 answer 88 views

When did psychometric testing begin?

asked Jan 20 in Psychology

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