Chemistry, 24.10.2021 04:00 gameranonymous266
How many atoms are contained in 4.0003 grams of helium, He? The molar
mass of helium, He is 4.0003 grams/mole. (Type your answer on the blank
and show your solution on a separate sheet of paper.) *
Answers: 2
Chemistry, 21.06.2019 22:30
Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.
Answers: 1
Chemistry, 22.06.2019 12:30
Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?
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Chemistry, 22.06.2019 16:50
Which element is least likely to undergo a chemical reaction
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Chemistry, 22.06.2019 16:50
Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
Answers: 1
How many atoms are contained in 4.0003 grams of helium, He? The molar
mass of helium, He is 4.0003...
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