\( \mathrm{SnO}_{2} \) Express your answer with the appropriate units. \( n=2.93 \times 10^{-2} \mathrm{~mol} \)

5 What is meant by the term hygroscopic when referring to brake fluid?

The half-life of the radioactive element unobtanium- 47 is 10 seconds. If 80 grams of unobtanium- 47 are initially present, how many grams are present after 10 seconds? 20 seconds? 30 seconds? 40 seconds? 50 seconds?

What does word root indicate in IUPAC name? b. Write the suffix for doubly bonded \( (\mathrm{C}=\mathrm{C}) \) alcohol. c. Ifsame substituent is repeated thrice, which prefix is added to word root? \& Write IUPAC name of \( \mathrm{CH}_{3}-\mathrm{CH}(\mathrm{CI})-\mathrm{CH}_{2}-\mathrm{COOH} \). e. Which group is selected as suffix if -OH and -CHO both are present in the compound?

You need to calculate the enthalpy change \( \left(\Delta H^{0}\right) \) of the reaction \( \mathrm{A}+\frac{1}{2} \mathrm{~B} \rightarrow \mathrm{C} \). How can the enthalpies given for the reaction steps below be combined to give the overall change in enthalpy? \[ \mathrm{A}+\mathrm{B} \rightarrow \mathrm{D} \]

The electronic configuration of one element is \(1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 3d^ { 10} 4s^ 1\). What is same group which is recently discovered?