Explain the following observations There are alwaysgaps to railway
lines
The bulb of a taboratory thermom
enter should not be held using
it to measure the temperature of
ŭ substance
When a clinical thermometer is us
ed, it is sterilized to alchol before
It is used again
solar panels are always painted be
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How does a noncompetitive inhibitor reduce an enzyme’s activity?

15) a substance used in manufacturing gasoline consists of finely divided platinum supported on an inert solid. suppose that the platinum is formed by the high temperature reaction between platinum (iv) oxide and hydrogen gas. the other product is water. a) write and balance the equation b) how many grams of hydrogen are needed to produce 1.0 g of platinum metal? c) how many moles of water are produced at the same time? how many grams? ( show work, .)

In which of the following is concentration expressed in percent by volume