During the winter months, many locations experience snow and ice storms. it is a common practice to treat roadways and sidewalks with salt, such as caco3 . if a 18.1 kg bag of caco3 is used to treat the sidewalk, how many moles of caco3 does this bag contain?

180.845 mol

Explanation:

Molar mass of Ca: 40,078 g/mol

Molar mass of C: 12,0107 g/mol

Molar mass of O: 15,999 g/mol

Molar mass of CaCO3: (40,078+12,0107+3×15,999) 100,0857 g/mol

The number of moles= mass of bag in g ÷ molar mass of CaCO3

⇒ n= (18.1×1000)÷100,0857 = 180.845 mol

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them