This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining): Ni(CO)_4 A Chemical engineer has determined by measurements that there are 3.134 moles of nickel in a sample of nickel tetracarbonyl. How many moles of carbon are in the sample? Be sure your answer has the correct number of significant digits.

We have 12.54 moles of carbon are in the sample.

Explanation:

Step 1: Data given

Nickel tetracarbonyl = Ni(CO)4

Number of moles nickel = 3.134 moles

Step 2: Calculate moles carbon

For 1 mol Ni(CO)4 we have 1 mol Nickel, 4 moles carbon and 4 moles oxygen

If we have 3.134 moles nickel, this means we have 3.134 moles of Ni(CO)4

For 3.134 moles Ni(CO)4 we have 4*3.134 = 12.54 moles of Carbon

We have 12.54 moles of carbon are in the sample.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).