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General Chemistry
Which component of the ammonia buffer will react upon addition of strong base to the buffer solution?
General Chemistry
4. Iron has an atomic weight of 55.85 g/mol and a density of 7.86 g/cm^3. It crystallizes in a cubic unit cell with an edge length of 0.286 nm. What is its geometry?
General Chemistry
6. You are given a small bar of an unknown metal. You find the density of the metal to be 18.6 g/cm3. An x-yar diffraction experiment measures the edge of the face-centered cubic unit cell as 4.13 x 10-10m. Find the atomic weight (in g/mol) of this metal and assess its identity.
General Chemistry
how many ml of water at 10 degrees celsius (2 significant figures) must be added to 75 ml of water at 35 degrees celsius to obtain a final temperature of 19 degrees celsius?
General Chemistry
What is the change in pH if 1.50mL of 1.00M HCl is added to the buffer solution? Is the buffer effective? Show your calculation.
General Chemistry
What is the change in pH if 1.50mL of 1.00M HCl is added to the buffer solution? Is the buffer effective? Show your calculation.
General Chemistry
Describe how selective media can be prepared to support growth of fungi.
General Chemistry
A 1.50 g sample of hydrocarbon undergoes complete combustion to produce 4.40 g of CO2 and 2.70 g of H2O. What is the empirical formula of this compound? In addition, its molecular weight has been determined to be about 78. What is the molecular formula?
General Chemistry
In which shell duplet rule applies?why
General Chemistry
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?
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#331389 on Nov 2022
#331389 on Nov 2022