The relationship between the number of electrons in an atom's outer shell and the atom's tendency to bond is called the octet rule. What can you infer about the meaning of "octet?" It refers to negative charges. It refers to sets of eight valence electrons It refers to explosive substances. It refers to different states of matter.
Try these: square Ca+square O_(2)arrow square CaO
How many valence electrons does Helium Have? 2 Valence electron 3 Valence electron 5 Valence electron 4 Valence electron 1 Valence electron
Refrigerants absorb heat: Select one: A. By evaporating from a liquid to a vapor. B. By converting heat energy into additional refrigerant molecules. C. By rearranging their molecular structure to form a new compound. D. By condensing from a vapor to a liquid.
MISSED THIS? Read Section 14.7. You can click on the Review link to access the section in your eText. Determine [H_(3)O^+] in each acid solution.If the acid is weak. indicate the value that [H_(3)O^+] is less than. 1.25 H_(3)PO_(4) [H_(3)O^+]=1.25M [H_(3)O^+]lt 1.25M [H_(3)O^+]lt 3.75M [H_(3)O^+]=3.75M
How many grams of carbon dioxide gas could the same tank hold? square g
Predict the change in enthalpy (Delta H) of this reaction. Answer: A Delta His(-) ; endothermic B Delta His(+) endothermic C Delta His(-) ; exothermic D Delta His(+) ; exothermic E Delta H=0 thermoneutral
What is the molar mass of sucrose (C_(12)H_(22)O_(11)) 342.3g/mole 50.23g/mole 29.02g/mole 182.0g/mole 210.0g/mole
0.180 mol C_(2)H_(6) Express your answer using three significant figures.
Which of the following correctly gives the correct coefficients for the reaction below? N_(2)H_(4)+H_(2)O_(2)arrow N_(2)+H_(2)O 2,4,2,4 2,4,2,8 1,2,1,1 1,2,1,4 1,4,1,4
During brazing, which of the following may present health hazards? Zinc Beryllium Cadmium or phosphorus All are correct
Which particles determine the affinity of atoms to each other and thus the likelihood of a chemical reaction? Protons Neutrons Electrons Nucleus
Get It? Explain how the ion $HCO_{3}^{-}$ can be both an acid and a base. Describe what happens in the forward and reverse reactions when ammonia is dissolved in water. Identify the conjugate acid, the conjugate base, and the two conjugate acid-base pairs.
Write the net ionic equation between $Cr_{2}(SO_{4})_{3}(aq)$ and $Ba(OH)_{2}(aq)$ Be sure to include the states of matter. $\square $
Sequence the following equations in the steps of the ionization of phosphoric acid in the correct order. $HPO_{4}^{2-}(aq)+H_{2}O(l)\rightleftharpoons H_{3}O^{+}(aq)+PO_{4}^{3-}(aq)$ $H_{3}PO_{4}(aq)+H_{2}O(l)\rightleftharpoons H_{3}O^{+}(aq)+H_{2}PO_{4}^{2-}(aq)$ $H_{2}PO_{4}^{-}(aq)+H_{2}O(l)\rightleftharpoons H_{3}O^{+}(aq)+HPO_{4}^{-}(aq)$
When a halide leak detector is used, what color will a blue flame turn when it comes in contact with leaking refrigerant vapors? A. blue B. green C. white D. orange
What kind of Isomers are 1-butene and 2-butene (pictured above)? stereoisomers structural isomers geometric isomers not isomers
Write the balanced NET ionic equation for the reaction when $Cr(NO_{3})_{3}$ and $Li_{2}CO_{3}$ are mixed in aqueous solution. If no reaction occurs, simply write only NR. Be sure to include the proper phases for all species within the reaction.
What type of elements are the lanthanides and actinides? a mostly nonmetals and a few metals b mostly metals and a few nonmetals C all nonmetals d all metals
Describe what happens in the forward and reverse reactions when ammonia is dissolved in water. Identify the conjugate acid, the conjugate base, and the two conjugate acid-base pairs.
