Recent activity by LynetteEspin

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Here's a problem for you to solve:What is the enthalpy change (∆H) for the combustion of methane (CH4) to form carbon dioxide (CO2) and water (H2O) based on the following information?CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) ∆H = -890.4 kJ/molYou have a sample of methane and you want to determine the heat released or absorbed during combustion. How much heat is produced when you burn 5.00 grams of methane (CH4) at a constant pressure of 1 atm, assuming that the products are carbon dioxide (CO2) and water (H2O) and that the heat capacity of the calorimeter is negligible?

answered 1 day ago in Physical Chemistry

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What are the most effective strategies to help students better understand complex chemical concepts such as atomic structure and molecular bonding?

answered 6 days ago in Chemical education

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Calculate the heat of hydration for magnesium ion when 0.5 moles of magnesium chloride is dissolved in 500 ml of water at 25°C. Given that the enthalpy change of solution for magnesium chloride is -641 kJ/mol and the specific heat capacity of water is 4.18 J/g°C.

answered Jan 23 in ThermoChemistry

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A chemistry student is given an unknown compound and is asked to identify its molecular formula using mass spectrometry. The compound has a molecular ion peak at m/z 86 and fragments at m/z 43 and 58. What is the molecular formula of the unknown compound?

answered Jan 22 in Analytical Chemistry

1 answer 52 views

What is the IUPAC name of the following alkane? CH3CH2CH2CH2CH2CH2CH2CH3

asked Jan 21 in Organic Chemistry

1 answer 23 views

How can Positive Psychology contribute to end-of-life care?

answered Jan 20 in Psychology

1 answer 23 views

According to the stage model of memory, what are the three memory stores?

asked Jan 16 in Psychology

1 answer 20 views

answered Jan 15 in Psychology

1 answer 33 views

What is the role of sex education in promoting healthy sexual development?

answered Jan 14 in Psychology

1 answer 20 views

What type of matter transmits light without scattering it?

asked Jan 8 in Science

1 answer 22 views

What is the most prevalent gas in the atmosphere, but not the most vital for life?

answered Jan 7 in Science

1 answer 25 views

What is the most important way that humans communicate?

answered Jan 7 in Science

1 answer 24 views

Meiosis and mitosis are both preceded by one round of what?

asked Dec 31, 2024 in Science

1 answer 26 views

Bones are made up of different types of what?

asked Dec 30, 2024 in Science

1 answer 11 views

The period of life between the start of puberty and the beginning of adulthood is called?

asked Dec 28, 2024 in Science

1 answer 28 views

The flood of sodium ions through the symporter provides the energy that allows what to move through the symporter and into the cell?

asked Dec 28, 2024 in Science

1 answer 25 views

A unique type of organism is also known as what?

asked Dec 28, 2024 in Science

1 answer 27 views

What works by providing a lower energy pathway from reactants to products?

answered Dec 27, 2024 in Science

1 answer 8 views

What is the raw material for evolution by natural selection called?

asked Dec 27, 2024 in Science

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