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a satellite is originally in an orbit of radius r but eventually because of friction descends to the earth hitting the
during a regular physical exam mr johnson who is moderately overweight and claims to smoke 10 to 15 cigarettes per day
at the rock concert the sound intensity level 5m from the podium is 105d8the maximal value of the sound intensity level
if an e-class model rocket motor provides 10 n of thrust force for three seconds and is installed in a model rocket
when a nucleus emits an alpha particle the atomic number increases or decreases by 1234 and the mass number increases
an mri scanner uses a large solenoid with inductance 053 h carrying 24 ka of currenta whats the energy stored in the
how much heat is exchanged when 100g of solution with a specific heat of 393 jg-1k-1 has an increase in temperature of
write a chemical equation that describes the heat of neutralization for the reaction of calcium hydroxide with acetic
in an experiment in a general chemistry laboratory a student collected a sample of a gas over water the volume of the
stearin also known as tristearin is a simple triglyceride formed by three chain of stearic acid its biochemical
a sample of an unknown compound was analyzed and was found to contain 0267 moles of tin and 1068 moles of chlorine what
calculate the volume of oxygen required to burn 1200 l of ethane gas c2h6 to produce carbon dioxide and water if the
1 how many grams of dry nh4cl need to be added to 240 l of a 0200nbspmnbspsolution of ammonia nh3 to prepare buffer
two liters of oxygen at 25 degree celsius and a pressure of 23 atm is added to a 30 l flask containing nitrogen with a
a blood sample containing salbutamol salt hcl is analysed in the pharmaceutical laboratorya calculate the molecular
the deltahvap of ethanol is 3856 kjmol and its normal boiling point is 35152k what is its boiling point at 0100
the boiling points for h2o bp 100oc and h2s bp -60degc are drastically different despite oxygen and sulfur being next
q1a sample of an unknown compound was analyzed and was found to contain 00894 moles of silver and 00447 moles of sulfur
the main component of many phosphate fertilizers is ca h2po42h2oif a fertilizer contains 171 p by mass w w and all of
1 50 g of white phosphorus are reacted with a limited amount of molecular chlorine to produce a colorless liquid a then
1 explain why the melting point and boiling point of alkali metals are low2 why is the ionisation action of alkali
a 50 ml volume of hcl solution and 05 m concentration was added to a sample of 55 g of magnesia milk this solution was
if it requires 385 milliliters of 085 molar nitric acid to neutralize 200 milliliters of barium hydroxide solve for the
1 for a reversible reaction at equilibriumabi what is the relationship between the rate law of the forward reaction the