Given four particle models: which two models can be classified as elements?

Celery stalks immersed in a 0.2 M solution of NaCl for 3 hours become limp and soft. Similar celery stalks immersed in fresh water for 3 hours become stiff and hard. What can be deduced about the celery cells based on this information?

A biological supply company is advertising the synthesis of a new compound. scientists note that when the compound is added to a particular chemical reaction, the reaction increases dramatically. the compound is likely a

What is the ratio of NH3 to H3PO4?

Describe how crust forming on the surface of lava illustrates the principle that removing heat from a system may result in a change in state.

consider the following reversable reaction C (s) + O2 (g) arrow thing, forgot what its called CO2 (g). what is the equilibrium constant expression for the given system?

Which of the following substances is NOT an alloy? a. Brass b. Bronze c. Stainless steel d. Tin

Relate the statement:"you cant get something for nothing" to the law of the conservation of mass

Which compound is sometimes found in fire extinguishers

The volume coefficient of thermal expansion for gasoline is 950 * 10-6 K-1. By how many cubic centimeters does the volume of 1.00 L of gasoline change when the temperature rises from 30°C to 50°C?

An element's most stable ion forms an ionic compound with bromine, having the formula XBr. If the ion of element X has a mass number of 85 and has 36 electrons, what is the identity of the element?