A car goes from 4.47 m/s to 17.9 m/s in three seconds

A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon. sort the conditions based on the gas described.

A pure substance is made up of several types of atoms true or false

The sample has a mass of 81 grams and a volume of 0.9 cubic centimeters. What is the density of the sample in grams per cubic centimeter?

Why does an atom have the same number of protons and electrons

The planet mars has two moons, deimos and phobos. phobos is about 9,000 km from mars and is about six times more massive than deimos. deimos is about 23,000 km from mars. upon which moon does mars exert a stronger gravitational force?

A) What are the postulates of Bohr's model of an atom? (b) Show diagrammatically the electron distributions in Sodium, Lithium and Aluminium atoms

How many liters of air are in a room that measures 10.0 ft * 11.0 ft and has an 8.00 ft ceiling? 1 in. = 2.54 cm (exactly); 1 L = 103 cm3

Which of these represents a chemical change? A) two compounds combining to form a mixture B) a mixture being separated into two elements C) a compound being separated into two elements D) an element changing state from solid to liquid

What properties would have caused early researchers to name hydrogen "inflammable air"

Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42-