When a sulfur (s) atom becomes an ion, what charge does it usually have?

Cracking is a process that breaks up hydrocarbon chains. a. True b. False

How did j. j thomson's discovery affect the model of the atom? a. it proposed that atoms are mostly composed of empty space b. it proposed that electrons orbit the nucleus like the planets in the solar system. c.

Some athletes have used steroids, often with negative consequences to their health. Steroids belong to which class of biochemicals?

The concentration of a substance involved in a reaction changes from 4.0 M to 2.0 M in 40 minutes. Is the substance a reactant or a product?

Give the symbol of the ion that contains 34 protons and 36 electrons

Differentiate between various qualities of reagents including ordinary, analar and industrial quality reagent

Do you know which plants are healthiest for bees?

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?

What is the molarity of a 2.0 l sodium hydroxide solution containing 1.0 grams of solute?

Whats the si unit chemist use to measure the amount of an element substance?