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### There are 75 results

Broad Topics > Applications > chemistry

### Chemnrich

##### Stage: 4 and 5 Challenge Level:

chemNRICH is the area of the stemNRICH site devoted to the mathematics underlying the study of chemistry, designed to help develop the mathematics required to get the most from your study. . . .

### Concentrations

##### Stage: 5 Challenge Level:

Use the interactivity to practise your skills with concentrations and molarity.

### Approximately Certain

##### Stage: 4 and 5 Challenge Level:

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

### Stats Statements

##### Stage: 5 Challenge Level:

Are these statistical statements sometimes, always or never true? Or it is impossible to say?

### Real-life Equations

##### Stage: 5 Challenge Level:

Here are several equations from real life. Can you work out which measurements are possible from each equation?

##### Stage: 4 and 5 Challenge Level:

Advanced problems in the mathematical sciences.

### Reaction Types

##### Stage: 5 Challenge Level:

Explore the rates of growth of the sorts of simple polynomials often used in mathematical modelling.

### Constantly Changing

##### Stage: 4 Challenge Level:

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

### Big and Small Numbers in Chemistry

##### Stage: 4 Challenge Level:

Get some practice using big and small numbers in chemistry.

### Core Scientific Mathematics

##### Stage: 4 and 5 Challenge Level:

This is the area of the advanced stemNRICH site devoted to the core applied mathematics underlying the sciences.

### A Question of Scale

##### Stage: 4 Challenge Level:

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

### Big and Small Numbers in Physics

##### Stage: 4 Challenge Level:

Work out the numerical values for these physical quantities.

### Mixing Ph

##### Stage: 5 Challenge Level:

Use the logarithm to work out these pH values

### Ph Temperature

##### Stage: 5 Challenge Level:

At what temperature is the pH of water exactly 7?

### Blood Buffers

##### Stage: 5 Challenge Level:

Investigate the mathematics behind blood buffers and derive the form of a titration curve.

### Extreme Dissociation

##### Stage: 5 Challenge Level:

In this question we push the pH formula to its theoretical limits.

### Exact Dilutions

##### Stage: 4 Challenge Level:

Which exact dilution ratios can you make using only 2 dilutions?

### Reaction Rates

##### Stage: 5 Challenge Level:

Explore the possibilities for reaction rates versus concentrations with this non-linear differential equation

### The Power of Dimensional Analysis

##### Stage: 4 and 5

An introduction to a useful tool to check the validity of an equation.

### Maths in the Undergraduate Physical Sciences

##### Stage: 5

An article about the kind of maths a first year undergraduate in physics, engineering and other physical sciences courses might encounter. The aim is to highlight the link between particular maths. . . .

### What Salt?

##### Stage: 5 Challenge Level:

Can you deduce why common salt isn't NaCl_2?

### Dilution Series Calculator

##### Stage: 4 Challenge Level:

Which dilutions can you make using 10ml pipettes and 100ml measuring cylinders?

### Smoke and Daggers

##### Stage: 5 Challenge Level:

We all know that smoking poses a long term health risk and has the potential to cause cancer. But what actually happens when you light up a cigarette, place it to your mouth, take a tidal breath. . . .

### Clear as Crystal

##### Stage: 5 Challenge Level:

Unearth the beautiful mathematics of symmetry whilst investigating the properties of crystal lattices

### The Real Hydrogen Atom

##### Stage: 5 Challenge Level:

Dip your toe into the world of quantum mechanics by looking at the Schrodinger equation for hydrogen atoms

### Diamonds Aren't Forever

##### Stage: 5 Challenge Level:

Ever wondered what it would be like to vaporise a diamond? Find out inside...

### The Amazing Properties of Water

##### Stage: 4 and 5 Challenge Level:

Find out why water is one of the most amazing compounds in the universe and why it is essential for life. - UNDER DEVELOPMENT

### Investigating the Dilution Series

##### Stage: 4 Challenge Level:

Which dilutions can you make using only 10ml pipettes?

##### Stage: 5

Read about the mathematics behind the measuring devices used in quantitative chemistry

### Spectrometry Detective

##### Stage: 5 Challenge Level:

From the atomic masses recorded in a mass spectrometry analysis can you deduce the possible form of these compounds?

### Lennard Jones Potential

##### Stage: 5 Challenge Level:

Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges

### Striking Gold

##### Stage: 5 Challenge Level:

Investigate some of the issues raised by Geiger and Marsden's famous scattering experiment in which they fired alpha particles at a sheet of gold.

### Mixed up Mixture

##### Stage: 4 Challenge Level:

Can you fill in the mixed up numbers in this dilution calculation?

### Cobalt Decay

##### Stage: 5 Challenge Level:

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.

### Catalyse That!

##### Stage: 5 Challenge Level:

Can you work out how to produce the right amount of chemical in a temperature-dependent reaction?

### Conversion Sorter

##### Stage: 4 Challenge Level:

Can you break down this conversion process into logical steps?

### Eudiometry

##### Stage: 5 Challenge Level:

When a mixture of gases burn, will the volume change?

### Ideal Axes

##### Stage: 5 Challenge Level:

Explore how can changing the axes for a plot of an equation can lead to different shaped graphs emerging

### Bent Out of Shape

##### Stage: 4 and 5 Challenge Level:

An introduction to bond angle geometry.

### Reaction Rates!

##### Stage: 5

Fancy learning a bit more about rates of reaction, but don't know where to look? Come inside and find out more...

### Gassy Information

##### Stage: 5 Challenge Level:

Do each of these scenarios allow you fully to deduce the required facts about the reactants?

### CSI: Chemical Scene Investigation

##### Stage: 5 Challenge Level:

There has been a murder on the Stevenson estate. Use your analytical chemistry skills to assess the crime scene and identify the cause of death...

### Heavy Hydrocarbons

##### Stage: 4 and 5 Challenge Level:

Explore the distribution of molecular masses for various hydrocarbons

### Reductant Ratios

##### Stage: 5 Challenge Level:

What does the empirical formula of this mixture of iron oxides tell you about its consituents?

### Coordinated Crystals

##### Stage: 5 Challenge Level:

Explore the lattice and vector structure of this crystal.

### Bond Angles

##### Stage: 5 Challenge Level:

Think about the bond angles occurring in a simple tetrahedral molecule and ammonia.

### Mathematical Issues for Chemists

##### Stage: 5

A brief outline of the mathematical issues faced by chemistry students.

### Molecular Sequencer

##### Stage: 4 and 5 Challenge Level:

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.

### Stemnrich - Applied Mathematics

##### Stage: 3 and 4 Challenge Level:

This is the area of the stemNRICH site devoted to the core applied mathematics underlying the sciences.

### Stereoisomers

##### Stage: 5 Challenge Level:

Put your visualisation skills to the test by seeing which of these molecules can be rotated onto each other.