1. Citric acid, C6H8O7, is prepared industrially via fermentation…
1. Citric acid, C6H8O7, is prepared industrially via fermentation of sucrose by the mold Aspergillus niger. The equation representing the reaction is C12H22O11 + H2o +3O2 —–>2C6H8O7 +4H20. What mass of citric acid is produced from 845 kg of sucrose, C12H22O11, if the yield is 93.20%? a)844 kg b)924 kg c) 884 kg d) 804kg […]
Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide…
Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. If 5.62g of water is produced from the reaction of 56.6g of hydrobromic acid and 16.2g of sodium hydroxide, calculate the percent yield of water.
Definitions of protons, neutrons, electrons, nucleus, isotope,…
Definitions of protons, neutrons, electrons, nucleus, isotope, atomic number, mass number • Be able to calculate protons, neutrons and electrons in atoms, and isotopes • Be able to calculate average atomic mass
How many radial nodes are present in this orbital? A) 0 B) 1 C) 2…
How many radial nodes are present in this orbital? A) 0 B) 1 C) 2 D) 3 Consider the following set of quantum numbers: n = 0, l = 1, m(l) = 0, and m(s) = +½. This is NOT a possible set of quantum numbers for an electron in an atom. Choose the […]
consider the folloing balenced equation. Ca(OH)2 (aq) +2 HCl (aq)…
consider the folloing balenced equation. Ca(OH)2 (aq) +2 HCl (aq) —–> CaCl2 (aq) + 2H2O (l). a sample of 1.295 M HCl is titrated to the equivalence point with 32.7 mL of 0.22 M Ca(OH)2. what volume in mL of HCl reacted.
An arctic weather balloon is filled with 46.7L of helium gas inside…
An arctic weather balloon is filled with 46.7L of helium gas inside a prep shed. The temperature inside the shed is 14.°C . The balloon is then taken outside, where the temperature is 4.°C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. […]
Ferrous sulfate heptahydrate (FeSO4•7H2O, MW 278.01) is often…
Ferrous sulfate heptahydrate (FeSO4•7H2O, MW 278.01) is often used to treat dietary deficiency of iron. During a co-op position at a pharmaceutical manufacturing facility producing iron pills, you were given the role of checking to see if the prepared pills contained the correct amount of iron. You selected twelve pills from the lot. The pills […]
Write the complete electron configuration for the zinc atom. Using…
Write the complete electron configuration for the zinc atom. Using NOBLE GAS notation write the electron configuration for the copper atom. Write the complete electron configuration for the chlorine atom. Using NOBLE GAS notation write the electron configuration for the lithium atom.Write the complete electron configuration for the chlorine atom. Using NOBLE GAS notation write […]
1) In equilibrium the predominant species are A) Carbonic acid and…
1) In equilibrium the predominant species are A) Carbonic acid and bicarbonate ion B) Acetate ion and acetic acid C) Acetic acid and bicarbonate ion D) Acetate ion and carbonic acid 2) The way in which a catalyst increases the reaction rate is by reducing the activation energy. True or False? […]
Determination of the Empirical Formula of Magnesium Oxide ….
Determination of the Empirical Formula of Magnesium Oxide
