What is the ph of a solution that consists of 0.50 m h2c6h6o6 (ascorbic acid) and 0.75 m nahc6h6o6 (sodium ascorbate) ? ka = 6.8 Â' 10-5 question 12 options: 1) 3.76 2) 3.99 3) 4.34 4) 4.57 5) 5.66?

Por favor! Se disuelven en agua 30.5g de cloruro amónico hasta obtener 0.5 Lde disolución. Sabiendo que la densidad es la misma que 1027kg/m^3, calcula: a.) La molalidad. b.) La normalidad.

Calculate how many moles of no2 form when each quantity of reactant completely reacts. 2n2o5 ( g.→4no2 ( g.+o2 ( g.

What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction? melting gas formation combustion precipitate formation

Water is known as the 'universal solvent' because: Water is capable of dissolving every substance. Water can dissolve many ionic and covalent compounds. Water can dissolve many substances, but often requires large amounts of heat to be added.

A theory which repeatedly fails to confirm the expected predictions: probably needs to be developed into a law probably should be discarded requires more research time should be maintained indefinitely,

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How does hess's law use intermediate reactions to calculate the enthalpy of a desired reaction?

Which atomic particle dtermines the chemical behaviour of an atom?

If you could travel to the Sun and back, about how far would you travel? A. 1 AU B. 2 AU C. 5 AU D. 10 AU

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.