Top answers

A chemist mixes together 0.450 mol N2 with 0.450 mol H2 in a sealed container. The mixture is heated and allowed to reach equilibrium. At equilibrium, the mixture contains 0.400 mol N2 and the total pressure is 500 kPa. Calculate Kp.

balanced equation: N 2 (g) + 3H 2 (g) <---> 2NH 3 (g) Both reactants and products are gases, therefore it affect Kp value. This equation reaches equilibrium as it is in a "sealed container", ...
NG
Answered by Nayan G. • Chemistry tutor
15436 Views

How does bonding effect the melting point of a substance?

In chemistry we often talk about how 'weak' or 'strong' bonds are. The stronger the bonds are between two atoms, the more (kinetic) energy is required to break them apart. This means that more heat is needed...
MH
Answered by Morgan H. • Chemistry tutor
14237 Views

Given the balanced equation: MgCO3 + 2HCl --> MgCl2 + H2O + CO2, if 5 grams of MgCO3 is used, what volume of CO2 is produced? (molar mass of MgCO3 is 84.3 g/mol)

This question can be split up into two parts, and uses two key equations: It's always a good idea to look at what information we have been given already, and work out what we can do with it! In this question...
AB
Answered by Angus B. • Chemistry tutor
14249 Views

Explain the trend in the boiling temperatures of the elements on descending group 7, from fluorine to iodine.

Understanding the question: The process of boiling is heating the mixture until the liquid turns into gas. This process requires breaking intermolecular forces (interactions between molecules (eg: hydrogen b...
BY
Answered by Berna Y. • Chemistry tutor
14691 Views

Flask Q (volume = 1.00 x 103 cm3 ) is filled with ammonia (NH3) at 102 kPa and 300 K. Calculate the mass of ammonia in flask Q. (Gas constant R = 8.31 J K−1 mol−1 )

n = PV/RT 102 000 ×(1.00 × 10−3) / 8.31 × 300 = 𝑛 n= (4.091456077x10-2) Mass = n x 17 = 0.696g (3 sig figs only)
AR
Answered by Ashley R. • Chemistry tutor
7276 Views