Questions by MargaretaBal

0 votes

1 answer 78 views

What is the concentration of iron(II) sulfate in a sample of water taken from a lake, using spectrophotometry with a known molar absorptivity of 11,300 L/mol*cm, if the absorbance of the sample is measured to be 0.423 at a wavelength of 510 nm?

asked 6 days ago in Analytical Chemistry

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1 answer 40 views

Calculate the enthalpy change for the hydrolysis of 2 moles of magnesium bromide, MgBr2, in water, given that the standard enthalpy change of formation of magnesium oxide, MgO, is -601.6 kJ/mol and the standard enthalpy change of formation of hydrogen bromide, HBr, is -36.3 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 22 views

What is the impact of nutrition on mental rotation?

asked Jan 20 in Psychology

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1 answer 20 views

How do we evaluate the parsimony of psychodynamic theories?

asked Jan 16 in Psychology

0 votes

1 answer 35 views

What type of galaxies have a rotating disk of stars and dust, a bulge in the middle, and several arms?

asked Jan 8 in Science

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1 answer 51 views

What are hollow cylinders and are the thickest of the cytoskeleton structures?

asked Jan 3 in Science

0 votes

1 answer 30 views

The shape of the path of an object undergoing projectile motion in two dimensions is a what?

asked Jan 2 in Science

0 votes

1 answer 42 views

Carbon and what are the second and third most abundant elements in your body?

asked Dec 27, 2024 in Science

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