How many elements are in the periodic table

What type of crystals does iodine, dry ice (CO2), ice and plastic form?

What is the number of moles of glucose C6H12O6 in a 134g sample?

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 150 kJ. How much energy moves inward from the air or the walls of the container? A. 75 kJ B. 100 kJ C. 150 kJ D. 200 kJ

Can our bodies produce salt also is it possible to use our body oil to cook

Which is an example of a polyatomic ion? A) H2 B) CO3- C) Mg+ D) Ne + -

To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or a little more hydrochloric acid to the reaction?

A 10.0 gram sample of h2o at 23.0c absorbs 209 joules of heat. what is the final temperature

What does the sum of the protons and neutrons in an atom equal

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2 (g) at STP

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.