Essays Tagged: "Room temperature"


MERCURYMercury is a metallic element that is a liquid at room temperature, it is one of the transition elements. Mercury's atomic number is 80. It is superco ... ent by the French chemist Antoine Laurent Lavoisier in his experiment on the composition of air. At room temperature mercury is a shining, moving liquid that has a silvery-white color, and slightly vo ...

(2 pages) 45 0 4.2 Feb/1997

Subjects: Science Essays > Chemistry

The Exiting World of Water

I thought it was the best I've written Very GoodPropertiesWater(h 2 0)is a liquid at room temperature, is odorless,tasteless, has a blush tint which may be detected; however, only inlay ...

(2 pages) 41 0 4.3 Dec/1996

Subjects: Science Essays > Biology


onance structure, and can be drawn in two different ways:O=O- O-O=OIt is a bluish, explosive gas at room temperature, and has a boiling point of -119°C. It has a melting point of -193°C, and i ...

(3 pages) 50 0 3.0 Mar/1997

Subjects: Science Essays > Chemistry

Cooling Water and Exponential Funtions

s and graphing calculators, the change in temperature of a glass of boiling water left to cool in a room. The purpose of the lab is to see how exponential functions can be applied to real-life applica ... re to decrease as soon as the water is taken of off the heating device. If the water is left in the room long enough, the temperature will be able to reach room temperature, no less.Using the calculat ...

(4 pages) 59 0 4.1 Jan/2003

Subjects: Science Essays > Mathematics

Bromine: History and Study

ave. I weigh a mere 79.904 atomic mass units, and my density at 293K is 3.119g/cm3. I'm a liquid at room temperature, the only non-metal liquid at that. I boil at 58.78°C, which is just 137.804&de ...

(2 pages) 24 0 3.0 Apr/2003

Subjects: Science Essays > Chemistry

Decomposition of Organic Material.

ight weeks, control A was to be stored in an incubator of 98 degrees. Subject B was to be stored at room temperature. My question was, would the weight of each specimen decline in weight, increase in ... d subject B. For the next eight weeks, one bag was kept in an incubator of 98 degrees, the other at room temperature. Every seven days, the specimens were weighed and documented, using a digital scale ...

(4 pages) 36 0 3.0 Apr/2003

Subjects: Science Essays > Biology

An Investigating into Fitness, Diet, Obesity and Exercise (in Britain).

nsaturated, depending on the proportion of the different types of fatty acids they contain.Fats, at room temperature, are called oils. When fats absorb oxygen they spoil and become rancid. Fat has a h ...

(5 pages) 203 0 3.0 Apr/2003

Subjects: Humanities Essays > Health & Medicine > Health & Fitness

How Amylase Digests Starch.

ein.PredictionI predict that the amylase will digest the starch the best and the quickest at around room temperature, (35 C-45 C). I have come to this prediction because I think that enzymes are more ...

(3 pages) 40 0 0.0 Jul/2003

Subjects: Science Essays > Biology

Process manufacturing tecnology.

ted. Liquid A loss may also be significant. Neither of the reactions will proceed satisfactorily at room temperature. The reaction of the Solid A and Liquid A is much faster than the break down of the ... uipment, in extraction of metals and for numerous other purposes.Hydrochloric acid may occur in workroom air as a gas or mist. The mean concentration of hydrochloric acid during pickling, electroplati ...

(15 pages) 180 1 3.0 Aug/2003

Subjects: Science Essays > Engineering > Manufacturing Engineering

Metallic and Ionic bonding.

ing and boiling temperatures-Generally have high densitiesExceptions in metals:-Mercury ? liquid at room temperature, unusually low melting point.-Chromium ? brittle rather than malleable.Structure of ... nt of energy required to break the force of attraction of the electrons donated to anion.-Solids at room temperature-Brittle and hardoStrong electrostatic forces exist between ions, so a strong force ...

(5 pages) 46 0 2.0 Sep/2003

Subjects: Science Essays > Chemistry

"Finding the relative atomic mass of lithium."

m method 1Moles of hydrogen produced:Assuming that 1 mole of gas occupies 24000 cm3 at pressure and room temperature!I will now calculate the number of moles of the hydrogen gas produced. I will do th ...

(5 pages) 49 1 4.0 Nov/2003

Subjects: Science Essays > Chemistry


agnesium is flexible and malleable when heated. The metal can not rust and by water or by oxygen at room temperature, but it reacts with acids. When heated to about 800° C, it reacts with oxygen a ...

(2 pages) 33 0 2.2 Jan/2004

Subjects: Science Essays > Chemistry

The importance of water

ecule is made from two 1hydrogen atoms and one 16oxygen atom (H20) and that is in a liquid state at room temperature. It boils at 100ºC and melts at 0ºC. Water is probably the fundamental re ...

(1 pages) 47 1 1.2 Jan/2004

Subjects: Science Essays > Biology

How different concentrations of acid affects the growth of the crest seed.

e investigation there could be many variables. Some include the concentration of the acid. Also the room temperature could be a variable. Others include the amount of light and the soil.During my test ... red. Other than that I think the planning went all right. There may have been some errors made. The room temperature kept changing over the days, which altered the speed of the growth, but each tube h ...

(3 pages) 25 0 3.7 Apr/2004

Subjects: Science Essays > Chemistry

A report on sulfur dioxide

Sulfur Dioxide (SO2) is a colourless gas at room temperature and has a pungent odour. It can be formed into a liquid at under high pressure; it ...

(1 pages) 32 0 0.0 May/2004

Subjects: Science Essays > Chemistry

How does concentration affect the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.

e the cross.What variables do we need to control?We need to control the temperature, this should be room temperature. We need to make sure the volume of the acid is 10 cm3 and that the volume of Sodiu ...

(2 pages) 64 0 4.2 Jun/2004

Subjects: Science Essays > Chemistry

To investigate the factors of affecting the resistance of a wire.

e. Variables that I am going to change.Width- 0.36mm2Material- Nichrome wireVoltage- 2VTemperature- Room TemperatureLength- 10cm, 20 cm, 30cm, 40cm, 50cmMaterial- NichromeLength- 50cmVoltage- 2VTemper ...

(8 pages) 28 0 5.0 Feb/2006

Subjects: Science Essays > Physics

Changes of activity level with tail oscillation of goldfish, Carassius auratus, exposed to various temperatures.

es between the activity level of goldfish and the change of temperature. However, in both trials at room temperature (18oC) goldfish had an extreme response compared to other two temperatures. It is c ... the skin, which has a nerve twig on it, will sense the temperature changes (McDowall 2000). At the room temperature, there is not much neurochemical been created in cerebellum, so the activity level ...

(10 pages) 20 0 5.0 Mar/2006

Subjects: Science Essays > Biology


Fats, or 'lipids' are like raw chicken fat, a greasy, yellowish substance that is translucent. At room temperature, fats that are liquids are often referred to as oil. In the body, they are stored i ...

(2 pages) 27 0 2.3 May/2006

Subjects: Science Essays > Biology

Alkanes & Alkenes

ies and uses of alkanes:Name of alkane: Melting point oC: Boiling point oC: Density g/cm3: State at room temperature:Methane CH4 -182 -162 0.42 GasEthane C2H6 -183 -88 0.55 GasPropane C3H8 -188 -42 0. ... asPropane C3H8 -188 -42 0.58 GasOctane C8H18 -57 126 0.72 LiquidThe first four alkanes are gases at room temperature.Alkanes with 5-17 carbon atoms are liquids.Alkanes with 18 or more carbon atoms are ...

(2 pages) 17 0 2.0 Jun/2006

Subjects: Science Essays > Chemistry