A substance always has what properties even though they are difficult to observe

Oxidation for Na+Cl2>NaCl

If the temperature changes in a chemical reaction, what has occurred?

Which of these is not an example of a biotic part of the ecosystem? a. grass b. birds c. insects d. weather

How do you use the new hypothesis

5. A gas occupies 2000. Lat 100.0 K and exerts a pressure of 100.0 kPa. What volume will the gas occupy if the temperature is increased to 400. K and the pressure is increased to 200. kPa?

Given the reaction Cu + 2AgNO3 - > Cu (NO3) 2 + 2Ag, how many steps will it take to convert 64.8 grams of copper to moles of silver? Also, how many moles of silver will be produced?

Why is it hard for scientists to change lead into gold? Scientists would have to change the number of protons in lead atoms. Scientists would have to change the number of electrons in lead atoms.

The smallest unit of charge is - 1.6 * 10-19 C, which is the charge (in coulombs) of a single electron. Robert Millikan was able to measure the charge on small droplets of oil by suspending them between a pair of electrically charged plates.

How many moles are equal to 47.2 g of K2O

A molar solution is a solution that contains one mole of solute in