When you use your senses to obtain information you make this

A. Experiment

B. Chemistry

C. Matter

D. Observation

In which of these substances are the molecules probably moving most quickly? solid iron at - 45°C solid iron at 300°C liquid iron at 1600°C liquid iron at 1800°C

When the pentaacetate anomer obtained in this reaction is heated with zncl2 and acetic anhydride?

which type of organism can be obtained energy directly from any of the other organisms in the ecosystem

Car A has a mass of 1.200 kg and is traveling at a rate of 22 km/hr. Car B has a mass of 1200 kg and is traveling in the same direction at 25 km/hr.

A neutron has a mass A. that is less than the mass of an electron. B. that is about equal to the mass of an electron. C. that is about equal to the mass of a proton. D. that is less than the mass of a proton.

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease