<span>Nickel
is an element with a mass number of 58.6934 u <u>+</u> 0.0002 u.
It has a symbol of Ni and an atomic number of 28. Nickels are usually used to
make US coins because it is a silvery-while metal. It was Axel Fredrik
Cronstedt who were said to discover Nickel in year 1751. The melting point is
Nickel is 2 651 degree F or equals to 1 455 degree C. It is also said to be
hard and ductile.</span><span>
</span>
0.16
Explanation:
when you divided 1.2.00 with 740 you get this number.
5 bromo 1.1.1 -trichloro -5 ethyl 2.3 dimethyl heptane
Most of these look like dilution questions which follow a general pattern;
<span>Use M1V1 = M2V2 (because moles in a solution stays constant if diluted) </span>
<span>so, the Concentration before * Volume before = Concentration after * Volume after </span>
<span>Using the first question as an example; 0.2*50 = 100 * M2 </span>
<span>Rearranging for M2: 0.1 </span>
<span>Therefore the concentration of the final solution is 0.1 M </span>
<span>we know that to work out pH you must use negative logs to base 10; i.e. -log(0.1) gives you the pH for this solution which is 1</span>