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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
how much energy in kilojoules is needed to heat 3.60 rm g of ice from -11.0circ rm c to 30.5circ rm c? the heat of
Need to dissolve CaCl2 in water to make a mixture that is 38.5% calcium chloride by mass. If the total mass of the mixture is 886.2g
Activating effects question: Using resonance contributors, explain why the nitrile group is a deactivator and a meta director in electrophilic aromatic substitution. A drawing would be helpful too.
A lab bench has three one liter stoppered flasks. Flask A contains one gram of NH3 gas, flask B contains one gram of N2 gas, and flask C contains one gram of SO2 gas. All are at the same temperature.
Problem- If it takes 4.67 times as long for a particular gas to effuse as it takes hydrogen under the same conditions, what is the molecular weight of the gas
an old synthetic procedure starts by calling for fifteen kilo grams of sulfuric acid. if your largest reaction vessel
What is the concentration of chlorine ( in mg/L) of household bleach that contains 5.25% by weight of CL2. Assume the density of water = 1,000 kg/m^3.
Calculate the pH at the midpoint and at the equivalence point for a titration of 25mL of 0.100M potassium hydrogen phthalate with 0.100M KOH.
what does FU mean in stoichiometry?
Two 20.0g ice cube at -10 C are place into 275 C of water at 25.0 C. Explain what is the final temperature of the water after all the ice melts
A 6.52 g mass of a metal was heated to 103.88°C and then plunged into 100.0 g of water at 24.73°C. The temperature of the resulting mixture became 28.28°C.
Question- The probability that an isolated HCN molecule is in the J=9 rotational level at 250 K is 0.075. You have 0.25 atm of HCN gas in a 1 L balloon at 250 K how many HCN molecules are in the J = 9 rotational level. Assume HCN is an ideal gas.
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