Questions by NidaTimms920

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1 answer 54 views

Calculate the heat required to sublime 10 grams of dry ice (carbon dioxide) at its melting point (-78.5°C) and convert it to a gas at its boiling point (-57°C). The heat of sublimation of carbon dioxide is 25.2 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 10 views

A sample of an unknown compound was analyzed using elemental analysis, and the results showed that the compound contains 12.8% hydrogen, 49.2% carbon, and 38.0% oxygen by mass. What is the empirical formula of the compound?

asked Jan 22 in Analytical Chemistry

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1 answer 68 views

How might biological factors relate to ADHD?

asked Jan 20 in Psychology

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1 answer 45 views

What is the 'motivation-enhancement effect'?

asked Jan 14 in Psychology

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1 answer 31 views

Which body organ filters the blood in the body and creates urine?

asked Jan 8 in Science

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1 answer 78 views

What nest of cells protect the egg as it matures in the ovary?

asked Jan 7 in Science

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1 answer 28 views

Cirrus, stratus, and cumulus are the main types of what?

asked Dec 30, 2024 in Science

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1 answer 47 views

Layers of placental transfer cells help transport nutrients to the embryos as they develop into what?

asked Dec 27, 2024 in Science

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1 answer 78 views

What is a primary source of the hormone melatonin?

asked Dec 27, 2024 in Science

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