4. The volume of a gas is 27.5 mL at 22^circ C and 0.974 atm. What will the volume be at 15.0^circ C and 0.993 atm? (Hint: Remember to convert temperature to Kelvin using the equation T_((K))=T_((^circ C))+273)
19) Which of the following is a chemical change? A) wood burning in a fireplace B) ice melting to water C) chopping wood for a fire D) sewing a button on a shirt E) pouring water into a glass
v Details View Submission Listen Complete the sentences. Use the drop-down arrows to choose the correct answers. Atoms achieve stability by having electrons fill their square electron shell. This involves reaching a total of square electrons for most elements. middle outer
Question Choose the option below that exemplifies homogeneous equilibria. Select the correct answer below: N_(2)(g)+3H_(2)(g)leftharpoons 2NH_(3)(g) CaCO_(3)(s)leftharpoons CO_(2)(g)+CaO(s) P_(4)(s)+6Cl_(2)(g)leftharpoons 4PCl_(3)(l) H_(2)O(l)leftharpoons H_(2)O(g)
Write the equilibrium constant expression for K_(c) for the following process. 2CO_(2)(g)leftharpoons 2CO(g)+O_(2)(g) K_(c)= square
There are 7.16 mol C and 139 mol H in the sample. Divide by Smallest: Which substance should you divide by? hydrogen carbon don't need to divide
The quantitative proportion of reactants to products in a chemical reaction is known as __ the Law of Conservation of Mass stoichiometry the precipitation coefficient
What is the freezing point, in {}^circ C of a 0.41 m solution of C_(5)H_(4) in benzene? FP_((benzene))=5.50^circ C i=1 K_(f(benzene))=5.12^circ C/m Delta T_(f)=(i)(K_(f))(m) [?]cdot ^circ C
How many moles of HNO_(3) are present in 697 g of HNO_(3) 32 moles 8.4 moles 7.1 moles 14 moles
Determine the amount of heat (in kJ) associated with the production of 1.32times 10^4g of NO_(2) according to the following equation: 2NO(g)+O_(2)(g)arrow 2NO_(2)(g) Delta H=-114.6(kJ)/(mol) Be sure your answer has the correct number of significant digits. square kJ
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.
