03-02_task

10. Nitrogen, hydrogen, and ammonia (NH3) are all composed of molecules. What is it about a molecule of ammonia that makes it a compound, whereas hydrogen and nitrogen are elements? A) There are four atoms making up an ammonia molecule. B) The ammonia molecule contains atoms of two different types of elements. C) An ammonia molecule has more than one bond. D) An ammonia molecule has a larger mass than the sum of the masses of its constituent atoms.

Are the physical properties of a substance, such as color, sufficient to identify the substance? Why or why not?

A. Compare the lattice energy of LiF to the lattice energy of NaCl. Explain the difference in values based on your understanding of Coulomb’s Law. B. Compare the lattice energy of MgO to the lattice energy of NaCl. Explain the difference in values based on your understanding of Coulomb’s Law. C. What two properties of Coulomb’s Law are being compared in parts A and B? Which seems to be more significant in terms of predicting lattice energy values?

8. Fill in the following boxes. . HO. heat HO. SOC2 NaN3 1. he t 2. H2C 2 Mel +

I need help with this study guide answer in order

Not chemical but forms! such as button, images What are some of the basic form elements you encounter every day? What form elements do you prefer working with?

For each substance include its state of matter (using words, not symbols). Your sentences should include verbs (remember your telling a story). 1.) 2Ca(NO3)2(s) -> 2 CaO(s) + 4 NO2(g)+O2(g) 2.) ZnCl2(aq)+ 2 NaOH(aq) -> Zn(OH)2(s) + 2 NaCl(aq) 3.) Mg(s) + 2HCl(aq) -> MgCl(aq) +H2(g)

What is atom? molecule? compounds? definition, structure and  examples? The structure of atoms?

A 10.5 g sample of lithium is reacted with 18.5 g of fluorine to form lithium fluoride:Li + F2 → LiF. After the reaction is complete, what will be present?

Only typed explanation

A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt was found to be 4.501 g. Use these data to calculate: a) The mass of water in the hydrated salt.b) The percent by mass of water in the hydrated salt.

Part G the symbol of the halogen with the most electrons Express your answer as a chemical symbol. ΑΣφ ? chemical reaction does not occur for thís question.