Recent activity by ChristianFar

1 answer 26 views

What is the balanced chemical equation for the double replacement reaction between silver nitrate (AgNO3) and sodium chloride (NaCl)?

asked 4 days ago in Chemical reactions

1 answer 37 views

How can chemistry teachers provide hands-on experiences to students in remote learning environments where in-person laboratory access is limited?

asked Feb 5 in Chemical education

1 answer 40 views

Calculate the standard enthalpy change for the reaction in which 6 moles of calcium oxide reacts with 3 moles of carbon dioxide to produce 2 moles of calcium carbonate. The equation for the reaction is:CaO(s) + CO2(g) → CaCO3(s)Given the standard enthalpy of formation values: ΔHf°[CaO(s)] = -635.09 kJ/mol, ΔHf°[CO2(g)] = -393.51 kJ/mol, and ΔHf°[CaCO3(s)] = -1207.44 kJ/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 54 views

How can a chemistry student effectively learn and practice laboratory techniques when access to laboratory equipment and facilities is limited?

asked Jan 30 in Chemical education

1 answer 60 views

Calculate the Gibbs free energy change at 25°C for the reaction:2NO(g) + O2(g) → 2NO2(g)Given the standard Gibbs free energy of formation at 25°C for NO(g), O2(g), and NO2(g) are +86.4 kJ/mol, 0 kJ/mol, and +51.3 kJ/mol, respectively.

asked Jan 23 in Chemical thermodynamics

1 answer 48 views

A chemistry student needs to identify an unknown compound using mass spectrometry. The compound has a molecular ion peak at m/z 120 and four major fragment ions at m/z 91, 77, 63, and 45. What is the molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry

1 answer 61 views

How did Skinner's 'Skinner box' experiment demonstrate operant conditioning?

answered Jan 20 in Psychology

1 answer 33 views

According to Urie Bronfenbrenner's ecological systems theory, what is the chronosystem?

asked Jan 15 in Psychology

1 answer 41 views

What helps pumice float in water?

asked Jan 6 in Science

1 answer 76 views

How many pairs of chromosomes do human have ?

asked Dec 30, 2024 in Science

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