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1. Explain why the melting point and boiling point of alkali metals are low?
2.Why is the ionisation action of alkali metals decreasing from Li to Cs?
3. What elements of the periodic table's sector s are in large quantities in biological fluids and what is their significance?
4. What happens when alkali metals react with molecular hydrogen?
5. Write two uses of NaCl
considering this given equation ch4 g 3 cl2 g- chcl3 g 3 hcl g determine how many grams of methane is required to
calculate the number of carbon atoms in 3.8 moles of
Enter the sign of H° and S° for the condensation for CO2. Enter the sign as either + or -. Also indicate the temperature conditions (high temperature or low temperature) that favor condensation of CO2
When light of frequency 1.30x 1015 s-1 shines on the surface of cesium metal, electrons are ejected with a maximum kinetic energy of 5.2x 10-19 J. Calculate the wavelength of this light in nm.
The concentration of sodium + cation in a 0.73 mol/L solution of sodium carbonate is which of the following. Assume complete disassociation on this particular strong salt that completely disassociates in water.
Explain how the Uniform Guidelines on Employee Selection Procedures were developed and how firms use them to ensure they are abiding by the law.
The compound isopentyl acetate is responsible for the odor of bananas. The chemical formula of isopentyl acetate is CH3CO2C5H11. Explain how many carbon atoms is present in 23.8 mg of isopentyl acetate. (Avogadro's number is N0 = 6.022e+23)
The equilibrium constant Kc is 3.18E-3. Find the percentage of phosgene that dissociates at this temperature when 7.70 mol of phosgene is placed in a 29.3 L vessel.
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
Problem- A mixture 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid1.00-L container and the system was allowed to come to equilibrium. The equilibrium concentration of COBr2 was 0.233M. What is the value of Kc for th..
Calculate the volumetric size of a water molecule in vapor, assuming 1 mole of the vapor occupies 22.4 L, as if the vapor were an ideal gas. Give answer in angstroms, two significant digits.
Please select one example each of a food you like and a food you dislike and describe the chemistry that might account for your preferences. You may be surprised to learn that there are certain chemicals present in foods that might be found other ..
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