Why is vaporization classified as a phase change? It forms ash Identity changes It is reversible and involves state change It forms new compounds
Based on the equation how many grams of Br_(2) are required to react completely with 29.2 grams of AlCl_(3) 2AlCl_(3)+3Br_(2)arrow 2AlBr_(3)+3Cl_(2) 48.7 grams 52.6 grams 56.7 grams 61.3 grams
5. Why is the molecular formula for magnesium sulfide MgS instead of Mg_(2)S_(2) Empirical formulas are always used for all compounds instead of molecular formulas. Scientists always reduce the formulas from ionic compounds because the ratio of ions is what is important. Scientists only need to simply when the subscripts are the same number.
Part 12A: Calculate the molar mass of the compound vanadium (III) hydroxide, V(OH)_(3) M(V)=50.94(g)/(mol),M(H)=1.01(g)/(mol),M(O)=16.00(g)/(mol)
5. What is the percent composition by mass of nitrogen (N) in ammonium nitrate (NH4NO3)
What does 12.011 represent? element name atomic number atomic mass chemical symbol
13. Base your answer to the following question on the balanced equation below. 2Na(s)+Cl_(2)arrow 2NaCl(s) Explain, in terms of electrons, why the bonding in NaCl is ionic.
1. The pressure of a 6.02 mol sample of F_(2) in a 90.729 L container is measured to be 7.06 atm. What is the temperature of this gas in kelvins?
When the following equation is balanced with simplest whole numbers what is the coefficient for O_(2) C_(2)H_(5)OH+O_(2)arrow CO_(2)+H_(2)O 1 2 3 4 5 6 7 s 9
10. How many electrons does the calcium ion to the right have?The atomic number of calcium is 20. 11. How many hydrogen atoms are in H_(2)O 12. How many oxygen atoms are in glucose C_(6)H_(12)O_(6) 13. How many carbon atoms are in 3CO_(2) 14. What are valence electrons, and why are they important? 15. Describe the kinetic energy of the particles in: a) Solid-
When you balance the Separate Water simulation how many individual oxygen atoms do you need on the products side to complete the balanced equation? 1 2 3 4
Determine which type of property each statement describes by typing "physical or "chemical" in the blank. Hydrogen is a colorless tasteless, and odorless gas. $\square $ Hydrogen is very combustible in the presence of oxygen. $\square $ Hydrogen is very reactive with most elements. $\square $ Hydrogen is the least dense of all elements. $\square $
Which of the following is an empirical formula? $C_{3}H_{6}$ $C_{3}H_{8}$ CH $C_{2}H_{4}$
Which of the following has the most mass per mole? Oxygen Nitrogen Carbon Potassium
What is the electron configuration for oxygen, O? $1s^{2}2s^{2}2p^{3}$ $1s^{2}2s^{2}2p^{6}3s^{2}$ $1s^{2}2s^{2}2p^{4}$ $1s^{2}2s^{2}2p^{6}3s^{2}$
Gasoline, paints, thinners solvents, natural gas acetylene are all examples of potential: A. Toxic hazards. B. Flammable hazards. C. Combustible hazards. D. All of the above. E. None of the above.
Trans fats and partially hydrogenated oils are the same thing. False True
Is this compound ionic or covalent? $NO_{2}$ ionic covalent
(b) $H_{3}C-CH-CH_{2}-CH_{2}-CH_{3}\\ H_{2}C-CH_{3}$ 2-Ethylpentane Spell out the full name of the compound. The correct name is $\square $
Question 2 (Multiple Choice Worln 2 Points) (05.01 LC) Which of the following groups have seven valence electrons and are very reactive? Column 1 alkali metals Column 2 alkaline earth metals Column 17 halogens Column 18 noble gases
