4. In a mixture of hydrogen (H_(2)) and argon (Ar) gas, 15% of the total gas pressure is exerted by hydrogen. If the total pressure is 60 .0 atm, what pressure does the hydrogen exert? (Answer=9.0atm)
Which statement accurately describes part of the dissolving process of a polar solute in water? Solute molecules repel water molecules Water molecules surround solute molecules Water molecules are strongly attracted to nonpolar substances. Solute molecules remain concentrated in one part of the solvent
3. Write the formula for the following polyatomic ions. a. Calcium nitrate: b. Ammonium nitride: c. Sodium carbonate: d. Ammonium phosphate: e. Magnesium phosphate:
2. Write the name for the following ionic compounds. a. FeCl_(3) b. AgCl: c. ZnCl_(2)
8. Explain the rules used to assign oxidation numbers. __ 9. Why do some elements have multiple oxidation states? __
Which of the following is a possible way to describe the NO_(2) component in the reaction below? N_(2)(g)+2O_(2)(g)arrow 2NO_(2)(g) 1LNO_(2) 4 moles NO NO_(2) 2 molecules of NO_(2) 2 atoms NO_(2)
Question 1 (1 point) underline ( )H_(2)+underline ( )Cl_(2)arrow underline ( )HCl
3) (4 pts) Give the structures (condensed or line-angle structures) of the isomers of C_(4)H_(10) and name each.
(b) (15 points) If 32.05 ml of the NaOH standard are found to neutralize 25.00 ml of an unknown acid solution, determine the molarity of the unknown.
¿Cuáles son los conceptos básicos de la química? SELECCIONE TODAS LAS QUE CORRESPONDAN a Productos químicos b Reacciones químicas do Átomos y moléculas d Energía
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.
