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

Explain. 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. 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. 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