Chemistry Answers

A 54.0 ml sample of oxygen is collected over water at 23°C and 770.0 torr pressure. What is the volume of the dry gas at STP (Vapor pressure of water at 23°C= 21.1 torr).

How many grams of KOH are needed in order to prepare 1 litre of a

0.25M solution?

A functional group is an atom or a group of atoms the presence of which confers characteristic properties to the compounds

What are the n,l and mL quantum number corresponding to the 3s orbital

a given mass of gas occupies a volume of 950cm³ at 420/c and 0.92*10⁵ pressure. calculate the volume of the gas at S. T. P

What is the final temperature when 150.0 g of water at 90.0oC is added to 100.0 g of water at 30.0 oC?

The world’s largest gold bar in the toi gold museum in japan can be seen and touched by visitors. it has an irregular shape with dimensions about 17.9 in. by 8.9 in. by 6.7 inches, with a volume of 12.94 l. determine the mass and weight (1 kg = 2.205 lb).

Calculate the volume of CO2 measured at STP that can be obtained by the thermal decomposition of CaCO3 by the equation:

CaCO3=CaO+CO2

Ni crystallize s in a face - centered cubic structure. The radius of nickel atom is 1.25 A°.

What is the length of the unit cell edge in angstrom?

Consider a solution prepared by adding 2.70 grams acetic acid to 122.8 grams of water:

a. what is the percentage by mass of concentration of acetic acid in this solution?

b. what is the mass of acetic acid is present in 25.0 grams of this solution?