General Chemistry Answers

Calculate the boiling point and freezing point of a 1.7 m ethylene glycol solution.

How many aluminum atoms are in 4.22 g of aluminum?

If a 15.6 g object requires 836.8 J of heat to raise its temperature by 21.0°C, what is the specific heat of the object? 

If a 15.6 g object requires 836.8 J of heat to raise its temperature by 21.0°C, what is the specific heat of the object? 

A concentrated solution of aqueous ammonia is 25.0% w/w NH3 and has a

density of 0.999 g/mL.

What is the molar concentration of NH3 in this solution?

The molar solubility of aluminum hydroxide in a 0.179 M aluminum acetate solution is

M.

Use a periodic table to determine which of the following pairs of atoms are most likely to form an ionic compound when bonded.

Calcium (Ca) and Fluorine (F)

Chlorine (CI) and Bromine (Br)

Oxygen (O) and Carbon (C)

Hydrogen (H) and Carbon (C)

2. A 0.2719 g sample containing 𝐶𝑎𝐶𝑂3 reacted with 20.00 mL of 0.2254 M HCl. Given that HCl was excess. The excess HCl required exactly 20.00 mL of 0.1041 M NaOH to reach the end-point using phenolphthalein indicator.

Determine percentage purity of 𝐶𝑎𝐶𝑂3 in the sample. The reaction involved is

𝐶𝑎𝐶𝑂3(𝑠) + 2𝐻𝐶𝐼(𝑎𝑞) → 𝐶𝑎𝐶𝐼2(𝑎𝑞) + 2𝐻2O(l)

The titration reaction is

𝐻𝐶(𝑎𝑞) + NaOH(aq) 𝑁𝑎Cl(𝑎𝑞) + 𝐻2𝑂(l)

Calculate the molarity of the 19.60 g/L FeSO4(NH4)SO4.6H2O, standard

solution.

I’m one experiment 8.66g of NO is mixed with 5.03 g of O2 what is the limiting reactant