Consider sodium oxide, Na2O. Choose the best explanation for the subscript, 2, from the list provided.

Which of the following provides evidence to support Thomson's hypothesis about electrons? Gold foil experiment Cathode ray experiments Spectrum of colors emitted by gas Radiation produced when beryllium is bombarded with alpha particles

What is the the atomic mass of carbon-14 A.) 6 amu B.) 12 amu C.) 14 amu D.) 2 amu

We know that one mole of Oxygen gas contains two moles of O atoms (remember that O is a diatomic element in nature and is written O2). If we have a sample of O2 that contains 1.0000 x 10-20 mol, we will have (blank) atoms of O in the sample.

White phosphorus has the molecular formula p4 and sulfur has the molecular formula s8. how many grams of white phosphorus contain the same number of molecules as 6.41 g of sulfur?

C3H8 and CH4 are 2 compounds made from the same elements. This is an example of which law? A) Law of Conservation of Mass b) Law of Definite Proportions C) Law of Multiple Proportions D0First Law of Thermodynamics

One year ago, you sold a put option on 100,000 euros with an expiration date of 1 year. you received a premium on the put option of $0.04 per unit. the exercise price was $1.22. assume that 1 year ago the spot rate of the euro was $1.

Calculate the product of 0.0002115m and 0.0000405m. Express the answer in scientific notation

How do the different spheres of Earth interact? Volcanic eruptions are natural phenomena in the. They sometimes erupt, spilling out lava and dust. The lava solidifies, forming new landmasses.

Differentiate between mass, volume, and density. Explain why only changing the shape of an object would have no effect on its density.

Describe the properties of noble gases. Based on their electronic arrangement, explain whether they can exist alone in nature.