What is the part of an experiment that is not being tested and is used for comparison?

The reaction of 2h2+o2-->2H2o + heat is A exothermic B catalyze C liquid reaction D endothermic E none

Salt is a compound made from sodium (Na) and chlorine (Cl). Salt : A has properties very similar to sodium. B has properties very similar to chlorine. C has very different properties from sodium and chlorine.

Many burns occur in the kitchen. what are two things you can do to prevent burn accidents there

Given SiO2 + 4HF - -> SiF4 + 2H2O in this chemical equation how many grams of HF are needed for 182 grams of SiO2 to react completely?

Electrons returning to the ground state from varying excited states always: produce the same energy, because they are returning to the same ground state produce characteristic sets of energies, depending on the differences in energy between the

Our body solution tests at a pH of about 6.8. This pH is:

A diatomic gas has the molar mass of 38.00g/mol. what is the possible formula?

Which of the following is the final concentration of KCl if 500 ml of 0.25 M KCl is diluted to a final volume of 5 L? 0.025 L 0.0025 L 25 L 2.5 L

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?