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Ruthenium red can be used as a tissue stain for microscopy. It contains 38.56% ruthenium by mass. If each molecule of ruthenium red contains 3 ruthenium atoms, what is the molar mass of ruthenium red?
What volume (in mL) of water must be added to a 1.87 M solution of iron(III) chloride to make a 55.9 mL of a 0.71 M solution? Assume the volumes are additive.
The amount of carbon dioxide in a gaseous mixture of CO2 and CO can be determined by passing the gas into an aqueous solution that contains an excess of Ba(OH)2
Using the structure of mathyl orange as an example, draw resonance froms to show how conjugation extends throughout the molecule.
A 2.446 g sample thought to contain only one volatile substance, MgCO3, was heated in a nitrogen atmosphere for 30 minutes. After cooling
Identify and descrine the structure and function of specialised cells of protection, sensation and secretion in the integumentary system
compute the difference in pressure between ch4 and an ideal gas if 14.0 moles of gas are in a 6.00 litres tank at the
A 4.50-g sample of liquid water at 25.0 C is heated by the addition of 133 J of energy. The final temperature of the water is __________ °C. The specific heat capacity of liquid water is 4.18 J/gK.
An acid solution is 0.120 M in HCl and 0.210 M in H2SO4.What volume of a 0.160 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid.
Describe how a linear sequence of amino acids gives rise to the three-dimensional structure of proteins.
A procedural change would be essential if a boy want to determine the tomato juice's acidity by titrating a sample of juice with NaOH(sodium hydroxide) solution Briefly explain What change would you make to the procedure ?
A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent. One tube contains 125 toothpaste.
For each pair of substances below, which one will have the higher molar entropy. Justify each choice with a brief explanation. Which substance has greater molar entropy. Why is its entropy greater
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