The rock that consist of one mineral called mineraloids. * True O False The earth's crust divided in to two types : continental and oceanic. * True False The magma is the solid rock material found in depths of the earth. * False True

Q: calc . the equilibruim concebtration if k = 1.2 x 10^-5 4 If 0.50 mol of NO, is placed in a 2.0L fla...

A: If 0.50 mol of NO2 is placed in a 2.0L flask to create NO and O2 calculate [if keq = 1.2 x 10-5.  

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A: For one mole of N2, 6 mole of electron or 6 Faraday electricity is required.

Q: Find the oxidation number for each element in the following substance. Br2  1. Br =

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Q: šolution contains 0.305 M hydrocyanic acid and 0.379 M sodium cyanide. If 0.0518 moles of potassium ...

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A: %yield = ( Actual yield÷ Theortical yield)×100%

Q: Azelastine hydrochloride (pKa = 8.88, molar mass = 418.36 g mol-1) is an antihistamine used in nasal...

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Q: The activation energy, Ea, for a particular reaction is 19.4 kJ/mol. If the rate constant at 80 °C i...

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Q: 1. NaBH4 (е) CH2=CH-CH2-C-CH3 2. Нао 1. (CH3)2СHCH2-AIН-CH2CH(CHз)2, -78°C (f) -CH2-C-OCH3 2. Н,О

A: NaBH4 is mild reducing agent . It converts aldehyde and ketone compound to alcohol compound.  DIBAL ...

Q: If a reaction has the following thermodynamic values, AH xn 288 kJ/mol and AS rn - 98 J/K mol, at wh...

A: Given- ∆H°rex=288kJ/mol = 288000 J/mole ∆S°rex=98J/K mol  T=?      

Q: In one experiment, 0.871 mol of NO is mixed with 0.506O2. Determine which of the two reactants is th...

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Q: A buffer is prepared using 0.15 M HF and 0.15 M NaF. What is the pH of this buffer? pKa for HF is 3....

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Q: If 3.21 mol of a gas occupies 56.2 Lat 44 °C and 793 torr, 5.29 mol of this gas occupies __________ ...

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Q: What is the retention factor of a sample when after injectiion the void time (tM) took 4.73 sec? The...

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Q: Hb + C,H12O6 + NaOH + C3HŞN C44H42FEN,O4

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Q: * TOOLS x10 What is the concentration when Hg, Cl, precipitation is 99.99% complete? concentration o...

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Q: What is the pH of a 0.926M solution of acetic acid (Ka=1.8x10^-5)?

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Group 14 Elements

The following elements come under group 14 of the periodic table.