Thousands of years people believe the stars move across our sky explain why we now has a different explanation of why stars move across the night sky? Be sure to mention reference.

If 16.00 g of O₂ reacts with 80.00 g NO, how many grams of NO₂ are produced? (enter only the value, round to whole number)

How would you measure the specific latent heat of vaporisation of a liquid?

1. What percent of light passes through the sample if its absorbance A=2? 2. For the best calibration curve, the transmittance values (%T) should fall within the range from 10% to 90%.

An electron is in a region outside the nucleus

Under what conditions will a low temperature make a reaction spontaneous

Why are the atomic masses for most elements not whole numbers?

An aqueous solution is 0.387 m in hcl. what is the molality of the solution if the density is 1.23 g/ml?

Carbon monoxide reacts with oxygen to form carbon dioxide. 2 CO (g) + O2 (g) → 2C02 (8) In a 1.00 L flask, 3.40 atm of CO reacts with 2.60 atm of O2. Assuming that the temperature remains constant, what is the final pressure in the flask? 4.30 atm 2.

The nerves that Branch out from the spinal cord and connect to the body

The term southern oscillation most nearly refers to