General Chemistry Answers

Can an e be described by the following set of quantum numbers? If not indicate which of the quantum numbers has a value that is not valid: n=2, £=1, ml= -1, Ms=+½

If 15.65 mL of aq HCl is required to neutralize 20.00mL of the sodium carbonate solution from question 4 above ,what is the molarity of the aq HCl ? Show all your steps in your calculations below as set out below

Calculate the number of moles of Na2CO3 (standard solution) used in the titration

Using the balanced reaction equation find the number of moles of HCl that reacted

Calculate the molarity of HCl solution

A sample of 0.892 g of potassium chloride (KCl) is dissolved in 54.6 g of water (H2O). Determine the percent mass of KCl in the solution and its molality if the molar mass of KCl is 74.5513 grams per mole.

A sample of 0.892 g of potassium chloride (KCl) is dissolved in 54.6 g of water. What is the percent by mass of KCl in the solution?

A sample of 0.892 g of potassium chloride (KCl) is dissolved in 54.6 g of water. What is the percent by mass of KCl in the solution?

The density of a 2.45 M aqueous solution of methanol (CH3OH) is 0.976 g/mL. What is the molality of the solution? The molar mass of methanol is 32.04g.

You have ice at 263 K (-10.00°C) and 1.0 atm. What could you do to make the ice sublime

A closed rigid container into ally at 0c has a pressure of 375 torr find the pressure in tire when it’s temperature rises to 50c?

Exactly 1.387 g of compound Z was combusted to form 3.499 g CO₂ mo sand 0.614 g H₂O. Compound Z contains only carbon, hydrogen, and oxygen. Determine the compound's molecular formula if the molar mass of compound Z is 122.118 g/mole.

Calculate the grams of NaOH present in 600 mL of a 3.0 M NaOH solution

Consider the following unbalanced chemical equation:

H

2

O(l)→H

2

(g)

electricalcurrent

+O

2

(g)

H2O(l)→H2(g)electricalcurrent+O2(g)

A chemistry student tries to balance the equation by placing the subscript 2 after the oxygen atom in H

2

O

H2O.

What is the final pressure inside a scuba tank after it cools from 25°C to -10°C? The initial pressure in the

tank is 130 atm. 

Calculate the entropy change when graphite burns insufficient supply of oxygen as to graphite has 5.7J/molK, O2 has 205J/molK and CO2 has 213.6J/molK