4. Cobalt(II) chloride reacts with fluorine in a single replacement reaction to produce cobalt(II) fluoride and chlorine gas.
Balanced Equation:
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How many moles of fluorine are required to produce 290.8 g of cobalt(II) fluoride?
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Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.