a radioactive substance has a half-life of 10 years. if you start with 30 grams of the substance, how much will remain after 30 years.

What is the mole ratio of AlCl3 to AlSO4 in the above chemical reaction?

Correctly identify the generic formula for a synthesis reaction. a. AB + A+B b. A+B → AB c. CxHx + O2 → CO2 + H2O d. AB + C + AC + B e. AB + CD → AD + CB

How does the law of conservation of matter apply to chemical equations

Which process is an example of an exothermic reaction?

Which sentence correctly describes the position of electrons within an atom? A. Electrons exist outside the nucleus in indistinct electron clouds B. electrons orbit the nucleus in distinct circular paths c.

Calculate the mass of 1.25 moles of Al2 (SO4) 3

which of Nature's erosions message do you think wears down a mountain or part 2 faster when water or ice why

We dissolve 5.00 grams of sugar, C12H22O11, in water to make 1.000 L of solution. What is the concentration of this solution expressed as a molarity?

What mass of carbon monoxide must be burned to produce 175 kj of heat under standard state conditions?

The Wittig reaction involves coupling between a phosphonium ylide and a carbonyl-containing molecule. If a chemist wants to use the Wittig reaction to synthesize 3-methyl-3-hexene, which reactants should be used?