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Chapter 1: Problem 10
Write the name of the element represented by the following symbols. (a) \(\mathrm{Cr}\) (b) \(\mathrm{Ca}\) (c) Fe (d) \(\mathrm{Zn}\)
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The volume occupied by egg whites from four "large" eggs is \(112 \mathrm{~mL}\). The mass of the egg whites from these four eggs is \(1.20 \times 10^{2} \mathrm{~g}\). What is the average density of the egg white from one "large" egg?
In Europe, nutritional information is given in kilojoules (kJ) instead of nutritional calories ( 1 nutritional calorie \(=1\) kcal \() .\) A packet of soup has the following nutritional information: $$ 250 \mathrm{~mL} \text { of soup }=235 \mathrm{~kJ} $$ How would that same packet be labeled in the United States if the information has to be given in nutritional calories per cup? (There are \(4.18\) joules in one calorie and 2 cups to a pint.)
Express the following measurements in scientific notation. (a) \(4020.6 \mathrm{~mL}\) (b) \(1.006 \mathrm{~g}\) (c) \(100.1^{\circ} \mathrm{C}\)
Liquid helium is extensively used in research on superconductivity. Liquid helium has a boiling point of \(4.22 \mathrm{~K}\). Express this boiling point in \({ }^{\circ} \mathrm{C}\) and \(^{\circ} \mathrm{F}\).
Which of the following statements use exact numbers? (a) The little girl weighs \(74.3\) lb. (b) The boiling point of ethyl alcohol is \(78^{\circ} \mathrm{C}\). (c) The square root of 144 is 12 .
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