HA and HB are two strong monobasic acids.

25.0cm3 of 6.0 moldm-3 HA is mixed with 45.0 cm of 3.0 moldm-HB.

What is the H * (aq) concentration, in moldm-3, in the resulting solution?

A 1.9. C 4.1

B 2.1. D 4.5

Imagine a researcher allowed the paper chromatogram to develop for far longer than necessary in the mobile phase, such that the solvent front ran into the top edge of the paper and the spots continued to move.

Progesterone is a hormone that contains two ketone groups. The oxygen in the ketone group can function as a hydrogen bond acceptor. Select the amino acids that have side chains that can form a hydrogen bond with progesterone at pH 7. a. threonine. b.

How does water get to leaves on the top of the tallest tree against the force of gravity?

Formula A: CH3 Formula B: C2H6 Given the two formulas representing the same compound: Which statement describes these formulas? (1) Formulas A and B are both empirical. (2) Formulas A nd B are both molecular.

The enzyme urease enhaces the rate of urea hydrolysis at pH8.0 and 20 degree of centigrade by a factor of 1014. If a given quantity of urea in 5 min at pH 8.

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom

How is the ocean important to human survival? restate the question