Those are tough questions-to know what is in the mind of the teacher that writes them. Most appear to be metals Tin, Copper, Gold... Perhaps the scientists decided to use Latin names for these. They couln't have 2 C elements (Carbon and Copper) and Co is already Cobalt Sim...
Latin Name for Gold is Aurum and thus the symbol is Au, not Go as you might expect. Similarly, Lead in Latin is Plumbum so the Symbol is Pb. Copper is Cu, Potassim K. Other symbols were named in other ways. Oxygen is O, Hydrogen H, Sulfur S. Look at your Periodic Table.
Change all the denominators to 12ths. For example, 1/6=2/12 (multiply numerator and denominator by 2) Then you can add all the numerators to get the answer in twelfths. Try it yourself.
You need to multiply 8.00 by 4.5 (hours) EASY!
Thanks-just what I needed.
No 50-2=3m+2-2 48=3m 48/3=3m/3 16=m
Subtract 2 from each side. Then divide each side by 3. You can do it!
5n+15=4n+12 -4n -4n n+15=12 -15 -15 n=-3 Check 5(-3+3)=3(2*-3 +6) 5(0)=3(16+6) 0=3(0) 0=0 4x-4+2x+8 6x+4
There are 1500 ml in 1.5L Sammi said .0015. you multiply 1.5 by 1000 not divide it!
4. Write the balanced equation for CH4+Cl2_CH2Cl2+HCl What are 3 ways you can speed the reaction in this equation?