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Problem- Determine the minimum potential that must be applied to an alpha-particle so that, on interaction with a hydrogen atom, a ground state electron will be excited to n = 5
If possible just a brief explanation how you got the answer?
A technician was accidentally exposed to potassium-42 while doing some brain scans for possible tumors. the error was not discovered until 48h later when the activity of the potassium-42 sample was 2.1?ci .if potassium-42 has a half-life of 12 h
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium.
List factors that influence the size of ice crystals and corresponding methods to control the crystal size
What is the time required to reduce the concentration of lactose in 2 L of milk from an initial value of 2.50 mg/mL to a final value of 1.5 mg/mL.
3 charts are shown a.Absorbance at 2.0, b.absorbance at 0, and c.absorbance curve at 1 trending down to 0 all on the 400 to 700 scale. So if glucose is transparent to visible light at 400-700 wv. What would absorbance would be
Data for the decomposition of hydrogen peroxide at some set temperature T is include below. The rate law depends only on the concentration of H2O2.
Complete the following problems using dimensional analysis. Balance all of the equations that need to be balanced. The answers are given in parenthesis at the end of each problem.
Complete and balance the following if a reaction occurs. Write your answer as net ionic equation and include physical states of all compounds (including for water).
Zn(s) + 2 HCl(aq) H2(g) + ZnCl2(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?
Problem- A food storage chamber requires a refrigeration system of 15-ton capacity operating at an evaporator temperature of -8°C and a condenser temperature of 30°C. Refrigerant ammonia (R-717) is used and the system operates at saturated condi..
Naphthalene is the simplest of the polycyclic aromatic hydrocarbons and can be represented by three resonance structures
A precipitate of calcium phosphate is in contact with 653.9 mL of water. How many grams of calcium ion are present in the solution
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