Give the condensed electron configuration for each of the following: (a) Chlorine, Cl (b) Cobalt plus two ion, Co+2

Explain. [4 Points] 12) In a random sample of 28 families, the average weekly food expense was $95.60 with a standard deviation of $22.50. Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval. Assume the distribution of weekly food expenses is normally shaped.

Provide an appropriate response. [4 Points] 5) Decide if it is appropriate to use the normal distribution to approximate the random variable x for a binomial experiment with sample size of n = 48 and probability of success p = 0.6 . Why or why not?

How many moles of gas are there in a 45.0 L container at 25.0°C and 500.0 mm Hg? (R = 0.08206 L·atm/mol·K)

Which statement about the reaction below is correct? K2SO4  +  Ba(NO3)2

Provide the appropriate response. [5 Points] 19) Find the critical values,

Use the information provided to determine ΔH°rxn for the following reaction: CH4(g) + 3 Cl2(g) → CHCl3(l) + 3 HCl(g)        ΔH°rxn = ? Molecule   ΔH°f    (kJ/mol)   CH4(g)    -75 CHCl3(l) -134 HCl(g)    -92

Match each of the following compounds (note all the number in the formula are subscripts) to their molecular shape name.(hint: draw the Lewis dot structure for each)

Sodium hydride reacts with excess water to produce aqueous sodium hydroxide and hydrogen gas. How many grams of NaH will produce 0.746 L of gas at 25.1oC and a barometric pressure of 765 torr, when the hydrogen is collected over water. The vapor pressure of water at this temperature is 23.9 torr.  NaH (s) + H2O (l) →  H2 (g) + NaOH (aq)

Give the condensed electron configuration for each of the following: (a) Sulfur, S (b) Zinc plus two ion, Zn+2