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DIRECTIONS: A. How many atoms are in each of the following samples?
a.11.3g Pb
b.44.2g Mg
B. Calculate the mass in grams of each of the following samples.
a.1.50x10^18 atoms Ne
b.8.35x10^21molecules CH4
1. What is the percent composition of the following compounds? a.Naphtalene(C10 H8 )
b.Sucrose(C12 H22 O11 )
c.Aluminum sulfate(Al2(SO4)3
Calculate the percentage composition of carbon in table sugar, sucrose. which has a formula of C12, HZZ and O11
If 4.0 mol of broom on gas are present what mass of broom on gas is present
45.3L x 10 mol/L
Initially the mass was 42 grams. After only 10 years, 7 grams remained, assume exponential decay. How long did it take the mass to decrease to 30 grams?
What is the molar absorptivity e of a compound if a 2.5 X 10^-5 molar solution has an absorbance of 0.333 when the path length is 1.0cm? (Equation = A =ebc)
A gas occupies 195 cm3 at 43°C. Find its volume at 75°C
A gas occupies 195 cm3 at 43°C. Find its volume at 75°C
1. Why was the piece of steel wool stretched before being heated with the Bunsen burner?
3. Why was it necessary to dispose the contents of the A4 ( A4: potassium iodide solution lead(II) nitrate solution ) vial into a separate waste container?
As a chemical engineer you need to pump the products without affecting products properties.
Because the flow properties will affect the fluid properties of the products like density and
viscosity. Pumping without destroying product integrity is as important as the heat
exchanger that comes after the pump. The piston pumps can handle very delicate and
viscous food stuffs and can pump up to very high pressure without damaging the food
particles. It can also be applied very successfully in heavy duty applications for industries
other than the food industry.
Answer the following
Pump Can work empty (without product)
Requires few spare parts
Has no seal in contact with the product
Can work at high temperatures (100 °C)
Few numbers of valves per volume unit
Collect the information from various resources and use the collected data to
formulate&solve the problem.
