Recent activity by AbdulCorser8

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Determine the standard enthalpy of formation of nitrogen dioxide (NO2) given that the balanced equation for the combustion of one mole of NO2 is:4NO2(g) + 6H2O(l) → 4HNO3(aq) + 2NO(g)The standard enthalpies of formation for HNO3(l), H2O(l), and NO(g) are -174.1 kJ/mol, -285.8 kJ/mol, and 90.4 kJ/mol, respectively.

asked 1 day ago in Chemical thermodynamics

1 answer 39 views

Identify the type of bonding in calcium chloride and justify your answer with specific characteristics of the compound.

answered 4 days ago in Inorganic Chemistry

1 answer 57 views

What is the specific concentration of the pesticide residue chlorpyrifos in a particular brand of apples and how does it compare to the Maximum Residue Limit (MRL) established by the regulatory authority? Additionally, what is the potential human health impact of consuming the apples with the measured pesticide residue concentration?

answered 5 days ago in Environmental Chemistry

1 answer 72 views

How does the limited understanding of chemical bonding and molecular structure affect the efficiency of common chemical reactions, such as combustion or synthesis? Provide specific examples and explanations.

answered 5 days ago in Chemical education

1 answer 45 views

How can Raman spectroscopy be used to identify the presence of specific compounds in a complex sample, such as a mixture of organic molecules?

asked Jan 29 in Analytical Chemistry

1 answer 50 views

Calculate the magnetic moment of the compound Ni(CO)4 using the crystal field theory and determine whether it is diamagnetic or paramagnetic.

asked Jan 23 in Inorganic Chemistry

1 answer 48 views

Calculate the bond dissociation energy (in kJ/mol) of the C-H bond in methane (CH4) using the following data: - The enthalpy change for the combustion of one mole of methane gas is -890.3 kJ/mol.- The energy required to break one mole of H-H bonds is 433.4 kJ/mol.- The energy required to break one mole of C=O bonds is 799.5 kJ/mol.- The energy required to break one mole of O-H bonds is 463.0 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 67 views

A chemistry student needs to determine the conditions at which a pure substance will change from solid to liquid phase. The substance in question has a melting point of 120 °C and a heat of fusion of 35 kJ/mol. How much heat is required to melt 100 grams of the substance at its melting point? And, what is the temperature at which the substance will start to solidify if the ambient pressure is 1 atm and the substance has cooled from its liquid phase at 150 °C to its solid phase?

answered Jan 22 in Physical Chemistry

1 answer 36 views

Why was the electroconvulsive therapy stigmatized?

asked Jan 20 in Psychology

1 answer 37 views

What is group identity fusion?

answered Jan 20 in Psychology

1 answer 59 views

According to the situated cognition theory, how is cognition related to the environment?

answered Jan 15 in Psychology

1 answer 20 views

What is a cross-sectional study?

asked Jan 14 in Psychology

1 answer 48 views

What is the difference between nature and nurture?

asked Jan 10 in Psychology

1 answer 33 views

What nucleic acid stores the genetic information?

asked Jan 7 in Science

1 answer 29 views

The ovaries produce estradiol and progesterone, which cause secondary sex characteristics and prepare the body for?

asked Jan 2 in Science

1 answer 21 views

Protozoa can be classified on the basis of how they?

answered Dec 31, 2024 in Science

1 answer 20 views

Each kidney is supplied by a renal artery and what else?

answered Dec 30, 2024 in Science

1 answer 20 views

Fission is a method of what type of reproduction exhibited by some planarians?

asked Dec 27, 2024 in Science

1 answer 21 views

What type of mammals includes opossums, kangaroos, and koalas?

answered Dec 27, 2024 in Science

1 answer 26 views

Karyotyping shows whether what structures, which contain genetic information, are normal in number and appearance?

asked Dec 27, 2024 in Science

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