Recent activity by CaryLangford

1 answer 32 views

Here's a precise problem for a chemistry student to solve:Using Hess's Law, calculate the enthalpy change for the reaction where 2 moles of methane (CH4) reacts with 4 moles of oxygen gas (O2) to form 2 moles of carbon dioxide (CO2) and 4 moles of water (H2O), given the following known enthalpy changes:ΔH1 = -890 kJ/mol for the reaction: CH4 + 2O2 → CO2 + 2H2OΔH2 = -394 kJ/mol for the reaction: C + O2 → CO2ΔH3 = -286 kJ/mol for the reaction: H2 + (1/2)O2 → H2O

asked 1 day ago in Chemical reactions

1 answer 72 views

What is the concentration of copper in a soil sample taken from a copper mine using X-ray fluorescence spectroscopy?

answered 6 days ago in Analytical Chemistry

1 answer 16 views

How are animal welfare concerns relevant to evaluating animal psychology?

asked Jan 16 in Psychology

1 answer 22 views

What is animal communication?

answered Jan 13 in Psychology

1 answer 26 views

What is the term for a structure composed of more than one type of tissue?

answered Jan 7 in Science

1 answer 51 views

What is light with wavelengths shorter than visible light called?

asked Jan 6 in Science

1 answer 25 views

Sandblasting a surface exemplifies what form of erosion?

asked Dec 31, 2024 in Science

1 answer 25 views

Many microorganisms are single celled and use what for perception and movement?

asked Dec 31, 2024 in Science

1 answer 25 views

Bile salts produced by the liver assist in breaking apart what kind of fats?

asked Dec 30, 2024 in Science

1 answer 8 views

Bacterial contamination of foods can lead to digestive problems called what?

answered Dec 30, 2024 in Science

1 answer 17 views

What is the percentage of production transferred from one trophic level to the next

answered Dec 27, 2024 in Science

1 answer 24 views

What produces microspores that develop into pollen grains containing male gametophytes?

asked Dec 27, 2024 in Science

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