Which one of the following statements is correct?

A. An electron has a negative electrical charge.

B. An electron has a neutral electrical charge.

C. An electron is much larger than an atom.

D. An electron is located inside the nucleus of an atom.

Salt is added to water. You speed up dissolving by stirring the salt into the water. Then your teacher challenges you to separate the salt from the water.

Which of the following statements is false? A) Racemic mixtures of enantiomers do not rotate the plane of polarized light. B) Cyclobutane is more reactive than butane. C) Aldehydes are less reactive than ketones.

2H2O2 - > 2H2O + O2 how many moles will be produced from 26.0 g of H20

At equilibrium, the concentrations of the different species are as follows. [nh3] = 0.105 m [n2] = 1.1 m [h2] = 1.50 m what is the equilibrium constant for the reaction at this temperature?

When pure sodium hydroxide is dissolved in water, heat is evolved. In a laboratory experiment to measure the molar heat of solution of sodium hydroxide, the following procedure was followed. To a calorimeter containing 3.00 * 10^2 g of water at 20.

An object is dropped onto the moon (g m = 5 ft/s 2). how long does it take to fall from an elevation of 250 ft.?

Which type of luster gives the mineral the appearance of metal?

Anything that contains only one kind of material?

One mole of propane (c3h8) gas reacts with five moles of oxygen (o2) gas to produce three moles of carbon dioxide gas (co2) and four moles of water gas (h2o).

How many nitrogen molecules are in 1.2 moles of N2?