A buffer prepared by dissolving oxalic acid dihydrate ( H2C2O4⋅2H2O ) and disodium oxalate ( Na2C2O4 ) in 1.00 L of water has a pH of 4.957 . How many grams of oxalic acid dihydrate ( MW=126.07 g/mol ) and disodium oxalate ( MW=133.99 g/mol ) were required to prepare this buffer if the total oxalate concentration is 0.199 M? Oxalic acid has pa values of 1.250 ( pa1 ) and 4.266 ( pa2 ).

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

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