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A student placed 12.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
If two vessels are labeled A and B. Vessel A contains NH3 gas at 87*C and vessel B contains Ne gas at the same temperature. If the average kinetic energy of NH3 is 7.1x10-21 J/molecule at 70*C compute the root-mean-square speed of Ne atoms in m/s.
instant cold packs used to treat athletic injuries contain solid nh4no3 and a pouch of water.nbsp when pack is squeezed
Suppose you measured the pressure with a barometer which was not vertical. You measured the pressure to be 752mmHg and then noticed the barometer
Problem- Explain what might be the difficulties, if any using the esterification experimental procedure with 88% Formic acid and 95% Ethanol to prepare: hint check the physical properties of the reagents and products
compounds like are known as chlorofluorocarbons. these compounds were once widely used as refrigerants but are now
Define whether each of the following aqueous solutions would be acidic, basic or neutral and explain. Comprise the appropriate net-ionic equations to show why given solutions are acidic or basic.
a.) Available Electrons (AE) b.) Needed Electrons (NE) c.) Geometry Description d.) Number of sigma bonds e.) bonding description f.) lewis dot structure
An unknown substance contains only C, H, and, O. Combustion of 190.81 mg sample of the substance produces 387.77 mg CO2 and 72.17 mg H20.
given that the density of solid sodium is 0.968 gcm3 estimate the atomic metallic radius of a na atom. assess the value
The very dense metal iridium has a face-centered cubic unit cell and a density of 22.56 g/cm3. Use this information to calculate the radius of an atom of the element.
What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 ml sample of .250 M HCl is added to a 50 ml sample of .250 NaOH
write the balanced net ionic equation for the reaction that occurs when 0.1 m solutions of copperii sulfate and calcium
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