Recent activity by MarilouRicar

1 answer 4 views

Calculate the standard enthalpy change for the fusion reaction of a sodium atom. Given the enthalpy of formation of Na(g) is 107.3 kJ/mol and the enthalpy of fusion of Na(s) is 2.6 kJ/mol.

answered 2 days ago in Chemical thermodynamics

1 answer 61 views

What is the percent composition of carbon, hydrogen, and nitrogen in a sample of caffeine? Use elemental analysis to determine the answer.

asked 5 days ago in Analytical Chemistry

1 answer 38 views

Calculate the amount of heat released when 25 g of NaCl is crystallized from a solution at its saturation point. The heat of crystallization of NaCl is -788 J/g.

answered Jan 23 in ThermoChemistry

1 answer 41 views

A student wants to produce aluminum oxide (Al2O3) in the lab. Write a balanced chemical equation for the reaction between aluminum and oxygen gas to form aluminum oxide. Calculate how many grams of Al2O3 can be produced from 25 grams of aluminum reacting with excess oxygen gas.

asked Jan 22 in Inorganic Chemistry

1 answer 6 views

Who proposed the concept of post-traumatic growth?

asked Jan 20 in Psychology

1 answer 4 views

According to Erik Erikson, what is the crisis that occurs during adolescence?

asked Jan 17 in Psychology

1 answer 46 views

Who is associated with parenting styles?

answered Jan 17 in Psychology

1 answer 19 views

Where does the concept of 'the absurd' come from?

asked Jan 17 in Psychology

1 answer 43 views

Who developed the theoretical orientation of cognitive-behavioural therapy?

asked Jan 16 in Psychology

1 answer 41 views

What is empowerment theory?

answered Jan 15 in Psychology

1 answer 28 views

What is pain self-efficacy?

asked Jan 15 in Psychology

1 answer 17 views

What term in physics refers to the use of force to move an object?

asked Jan 7 in Science

1 answer 33 views

What element makes up the majority of coal?

asked Jan 6 in Science

1 answer 22 views

An ammeter must be connected in series with what to allow it to accurately measure the current flow without causing any disruptions?

asked Dec 30, 2024 in Science

1 answer 19 views

What is the main component of phytoplankton?

asked Dec 30, 2024 in Science

1 answer 46 views

Which process helps absorptive protists absorb food molecules across their cell membranes?

answered Dec 28, 2024 in Science

1 answer 21 views

What is the name of a long and low hill of sediments which have been deposited by a glacier?

answered Dec 28, 2024 in Science

1 answer 31 views

Dry soils are relatively unproductive because plants need a sufficient quantity of liquid water to carry out what process?

asked Dec 27, 2024 in Science

1 answer 7 views

Like the marketplace, the metabolic economy is regulated by what basic principle?

asked Dec 27, 2024 in Science

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