Molecular formula of compound
An unknown compound has the empirical formula CH2. A 0.050-mol sample of this compound weighs 4.20 g. What is the molecular formula of this compound?
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An 8-kg plunger is released from rest in the position shown and is stopped by two nested springs; the constant of the outer spring is k1 = 4 kN/m and the constant of the inner spring is k2 = 12 kN/m.
How many moles of sodium hypobromite ({rm NaBrO}) should be added to 1.00 {rm L} of 5.0×10-2 M hypobromous acid ({rm HBrO}) to form a buffer solution of pH = 9.14?
A flask contains 22.5 g of an unknown liquid, initially at 14.0oC. After 2.34 kJ of heat are added to the liquid, its final temperature is 56.3oC. What is the specific heat of the liquid?
The snowmobile is traveling at speed v0 when it leaves the embankment at A. Determine the time of flight from A to B and the range R of the trajectory.
Oxygen gas is generated by the thermal decomposition of potassium perchlorate. the oxygen gas is captured by water displacement at a water temperature of 20 degrees C resulting in a water vapor pressure of 0.0231 atm. if the pressure inside of the
What volume of ammonia can be produced from 2.0L of nitrogen gas and 3.0L of hydrogen gas? Assume that all gases are measured at the same temperature and pressure.
Hawaiian macadamia nuts provide about 190 Cal of energy usable from the digestion of these nuts per 1.0 oz serving. If the usable energy in an 8.5 oz can were used to light a 100-watt (W) light bulb (1 W = 1 J⋅s), how many hours would the lig
An emergency override signal E is provided so that the operator can choose to apply ignition power even if both the blower has not operated for five minutes and the outdrive is in gear, but no gasoline fumes are present
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