Standard 0.5 by 0.25 which is 2.0 mol/dm
Standard Form:Standard form is used to write very large or very small numbers in a more simpler easier method by the use of powers. The powers are negative during the use of small numbers while big numbers have a positive power. There are some rules that have to be followed with standard form, one of them is that the number must be written between 1 and 10 followed by the power. If you wanted to write 81 900 000 000 000 in standard form it would appear like so: 8.19×10^13. The power is by 13 because of the decimal point being moved 13 times to make the number smaller so it appears as 8.19 to follow the rule. If you wanted to write a smaller number like 0.000 0012 then it would have a minus power instead and look like 1.2×10^-6, the power is a minus this time because the number is much smaller instead of much larger and the decimal point moves to the right instead of the left like the larger number in order to follow the rule of being between 1 and 10. To turn a number written in standard form back into a normal number then the powers must be used like a calculation, for example 8.19×10^13 would be carried out like 8.19 x 10000000000000 which equals 81900000000000. Standard form is often used in science.Standard form and Microscopes:Standard form and Measurements of concentration in chemistry:Concentration in chemistry can be several things such as molar concentration, mass concentration, volume concentration and number concentration. The concentration of any solution is measured by using moles, more specifically moles per cubic decimetre which when shortened means mol/dm3. If the concentration of a solution is higher the more of a certain substance will be found in that solution. Calculating and standard form examples: if 0.5 mol of a solution is dissolved in 250cm cubed of solution then to discover the concentration 250cm cubed needs to be divided by 1000 which leaves you with 0.25dm cubed, With this the concentration can be worked out by dividing 0.5 by 0.25 which is 2.0 mol/dm cubed. The amount of different substances in a solution if the volume and concentration is available.Standard form and Distance in physics using the wavelengths of different forms of radiation:Wavelengths refers to the electromagnetic spectrum and its waves such as infrared light,microwaves,radio waves, gamma rays,ultraviolet light,visible light and X-rays. Standard form comes into use when measuring the frequencies of the different waves for example Gamma rays have frequencies of 3*1019 and have wavelengths of 10-11 . Example of calculating the frequency of a radio wave: Using the equation Frequency = 1/time period, where F is the waves produced per second represented by Hz and T is the time it takes for one oscillation. What is the frequency of a radio wave if its time period is 0.0000003333333? This can be done with the equation since f would equal 1 divided by T, where T is 0.0000003333333 so 1 / 0.0000003333333 which is equal to 3,000,000 Hz.Collecting data in scienceCollecting and presenting data with a high standard is very important in every aspect of science, Analysing data and looking/comparing results becomes more difficult and less accurate if the data collected isn’t of a high standard as well as not being properly recorded.Primary data:Primary data is data thats obtained for the purpose of an experiment or project and has no other reason to be collected. It’s collected/viewed from someone personally/directly involved with something and is an advantage because its directly related with the work you’re doing but can also take time and accuracy to obtain.Secondary data:Secondary data is like primary data except it was collected or observed by another person and could be information that can be found online about an experiment or project instead of being collected by a person themselves as it can be costly. The data could be collected by a school or organisation who decided to make the data they collected public for others to use.Random and systematic errors:Random and systematic errors are errors that occur while collecting data but can also appear at a later date during calculations or other cases as well as a device producing an error during collection. Random errors are when the person recording results isn’t able to take the same measurement multiple times in order to get the same results.