O ácido tartárico é encontrado em muitas frutas inclusive em uvas. Ele é em parte responsável pela característica seca de certos vinhos. Calcule o pH e a concentração do íon tartarato (C4H4O62-) para uma solução de 0,250 mol/L de ácido tartárico, para a qual as constantes de dissociação ácida (H2C4H4O6) são: Ka1 = 1,0x10-3 e Ka2 = 4,6x10-5. Explique quaisquer aproximações ou suposições que você tenha a fazer em seu cálculo.

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

Chromosome 17 is made of over million base pairs.

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.