# Tutorial: Atom and Nucleon Number

Topics: Atom, Neutron, Chemical element Pages: 4 (1150 words) Published: June 27, 2011
LU 1 - Tutorial
1. Write the formulas for the following compounds: Compound Copper (II) chloride Iron(II) sulphate Sodium sulphate Ammonium nitrate Sodium nitrite Potassium sulphate Magnesium phosphate Formula Compound Lithium acetate Manganese (IV) nitrate Potassium permanganate Iron (III) oxide Potassium sulphite Potassium hydrogen carbonate Sodium iodate Formula

2. Express the following numbers in scientific notation: a) 0.000000027 b) 356 c) 47 764 d) 0.096 3. Express the following numbers as decimals: a) 1.52  10-2 b) 7.78  10-8 4. Express the answers to the following calculations in scientific notation: a) 145.75 + (2.3  10-1) b) 79 500 / (2.5  102) 5. State the number of significant figure in each of the following numbers. a) 2.0560 b) 0.000372 c) 300.6 d) 70030 6. What is the number of significant figures in each of the following measurements? a) 56 mL b) 2900 g c) 40.2 g/cm3 d) 0.0000003 cm e) 4.6 x 1019 atoms 7. Calculate and round the answers to the correct number of significant figures. (a) (b) (c) (d) (e) (f) 3.476 + 0.002 81.4 g  0.112 g 81.4  104.2 4.003  18.3 0.321 + 0.0041  1.2 6.810  0.0230  3.21

8. Calculate and round the answers to the correct number of significant figures. (a) (82.7  143) + (274  0.06) (b) (8.3  106 km)  (4.13  107 km)  (5.411  1012 km) (c) [(3.125  106) + (5.127  105)]  (6.72  108) 9. A student experimentally determines the specific heat of water to be 4.29 J/g /oC. He then looks up the specific heat of water on a reference table and finds that is is 4.18 J/g/oC. What is his absolute error and percent error?

10. A student takes an object with an accepted mass of 200.00 grams and masses it on his own balance. He records the mass of the object as 196.5 g. What is his percent error? 11. Carry out the following conversion of units: a) 275 cm3 to dm3 b) 750 ml to litre c) 25C to K d) 60 km hr1 to m s1 12. An average adult has 5.2 L of blood. What is the volume of blood in m3? 13. The...