If salt mixes well in water how can you tell if a lake is full of salt-water or fresh water

How can you prepare benzene

The average kinetic energy for a substance or object is directly proportional its temperature according to the statement, which answer best describes how a substance would be affected if its temperature increased? 1.

A vessel is full of a mixture of kerosene and petrol in which there is 18% kerosene. Eight litres are drawn off and then the vessel is filled with petrol.

Which kind of energy does matter have when it is in motion? kinetic intermolecular potential atomic

A solution has a hydroxide ion concentration of 1 * 10-5 M. What is the hydrogen ion concentration of the solution? (a) 1 * 10-1 M (b) 1 * 10-5 M (c) 1 * 10-9 M (d) 1 * 10-14 M

Hydrogen is an element with two naturally occurring isotopes: 2 H and 3 H. This means that 2 H, which has a mass number of 2, has fewer than 3 H, which has a mass number of 3. True/False

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?

What are the two main classifications of energy resources?

A liquid is heated and a solid forms at the bottom of the beaker. Is this a physical or chemical change?

How to predict the formula of an ionic compound based on the charges of the ions?