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Why does the atoms or molecules oscillate and vibrate about a fixed point in a solid substance?
Reaction pathway and balanced reaction between xenontetra flourideand water to give xenon trioxide and xenon in 1:2 ratio respectively
A hydrate of calcium chloride contains 49.3% water and has a formula weight of 219 g/mol. Calculate the molecular formula of the hydrate.
Problem- An aqueous solution containing 5.35 g of an optically pure compound was diluted to 700.0mL with water and placed in a polarimeter tube 10.0 cm long. The measured rotation was -5.15° at 25 °C.
It decomposes into its elements. Write the balanced equation for this reaction. If 71.8 g of Hgo is decomposed, calculate the volume of oxygen at STP
A piece of silver with a mass of 418 g has a heat capacity of 99.1 J/Celcius. What is the specific heat of silver
you are given the following free energy data in kcalmol for 25 degrees c and 1 bar total pressure. see belowspecies
An electron in the hydrogen atom makes a transition from an energy state of principle quantum number n to the n=1 state. If the photon emitted has a wavelength of 95nm, what is the value of n
Wine goes bad soon after opening because the ethanol (CH3CH2OH) in it reacts with the oxygen gas (O2) from the air to form water (H2O) an acetic acid (CH3COOH). What mass of ethanol is consumed by the reaction of 5.9g oxygen gas?
Cavendish prepared hydrogen in 1766 by rather quaint method of passing steam through a red hot gun barrel. H2O + Fe ---> Fe2O3 + H2 (unbalanced) What volume of H2 at a pressure of 820 torr and a temperature of 23C can be prepared by a reaction of ..
How do you calculate the pH when 0.2 moles of NaOH have been added to 1 mole of acetic acid during a titration. The pKa of acetic acid is 4.76.
By mass spectral analysis, a sample of strontium is known to contain 2.64x1010 atoms of Sr-90 as the only radioactive element. The absolute disintegration rate of this sample is measured as 1238 disintegrations per minute. Calculate the half-life ..
What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
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