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Questions in chemistry

[Done] Calculate the number of moles for the following: 1. 41.0 g of [tex]Ca(NO_3)_2[/tex] 2. 1.48 g of [tex]Ca(OH)_2[/tex] 3. 3.40 g of [tex]CaSO_4[/tex]

[Done] When you heat up an object, the particles in the object move in which way?

[Done] What did J.J. Thomson think the atom looked like?

[Done] The atomic number tells you the number of what in one atom of an element?

[Done] Theories are considered successful only if they... A. Can be used to make accurate predictions. B. Can be stated in simple terms. C. Can be written in the form of an equation. D. Have been accepted by all scientists.

[Done] How would you properly measure the mass of a liquid?

[Done] What are some common tools scientists use to measure length and mass?

[Done] Explain why the weight of an object is different on Earth and on the Moon, even though the object's mass is the same in both places.

[Done] Which of the following does not illustrate an effective way of coping with a major frustration? A. Leslie loved clothes and hoped to become a designer, so she quit her job at the convenience store and moved back to her parent's home in Arizona. B. Natalie was not getting ahead in her social service job and felt she was not serving her Latino clients well, so she became a determined student of Spanish. C. Cameron loved cars, but realizing he was not performing well as a car salesman, he persevered until he landed work as an apprentice mechanic. D. Tired of the long hours and low pay of his job at Burgers-R-Us, Robert began night classes in bookkeeping.

[Done] Which substance below is resonance stabilized by delocalized pi electrons? a. Benzene b. Hydrochloric acid c. Hydrogen gas d. Methane e. Potassium bromide