Chemistry, 15.01.2021 18:30 natebarr17
Le diamant est un cristal
constitué uniquement
d'atomes de carbone. On
considère que ces atomes sont
tous des atomes de carbone
12 (A = 12 nucléons). Il faut
en moyenne traiter 20 tonnes
de minerai pour extraire 1,0 g
de diamant, soit 5,0 carats.
Le diamant coûte très cher:
un diamant de 1,1 carat peut être vendu 15 000 €.
• Combien coûte un «atome de diamant»?
Donnée
mnucléon = 1,67 x 10-22 kg.
Answers: 1
Chemistry, 22.06.2019 22:30, teagan56
Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.
Answers: 1
Chemistry, 23.06.2019 03:20, coollid876
High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?
Answers: 3
Le diamant est un cristal
constitué uniquement
d'atomes de carbone. On
considère que ce...
d'atomes de carbone. On
considère que ce...
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