States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
1) 0.1% w/v = ? mg/100 ml? Only include the number and not any units
2) 0.1% = ? ug/ml? Only include the number and not any units
3) What is the concentration of your stock in ug/ml? Only include the number and not any units
4)The molecular weight of tartrazine is 534.4 g/mole. What is the concentration of your stock solution in mM? Be sure to give your answer in milliMolar to TWO decimal places.
5)What dilution of your stock do you need to get the first standard (100 ug/ml)? Express as 1:x, where x is the fold dilution needed.
6)What weight of tartrazine (in mg) would you need to make up 250 mL of a 2.5 mM solution (MW of tartrazine is 534.4 g/mole)? Give your answer to the nearest whole number. write the number only, not the units
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