Calculate the pH of a buffer that is 0.13 M in lactic acid and 0.11 M in sodium lactate

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

An engineer chooses to use bamboo as a building material because it grows quickly and needs little space to grow. This is an example of Apex

The density of platinum is 21.45 g/cm3 at 20 ∘c. calculate the mass of 80.00 cm3 of platinum at this temperature.

I don't know where to start with this Which salt is produced by adding aqueous ammonia to aqueous sulphur dioxide until just alkaline? A NH4SO3 B NH4SO4 C (NH4) 2SO3 D (NH4) 2SO4

Water changing from a liquid to a gas is

A scientist discovers a new type of polymer. What must be true about this polymer? A. It contains carbon atoms arranged in a ring structure. B. It has double bonds between all the carbon atoms. C. It contains molecules of many different types. D.

A line in the lyman series of hydrogen has a wavelength of 122 nm. from what state did the electron originate?

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.

The tyndall effect is used to detect A: suspensions B:liquid solitions C:tyndalls D:colloida