Which of the following fields does NOT commonly use UV/Vis spectrometry? A Chemistry B Environmental Science C Clinical diagnostics D Astronomy
A gas sample in a Boyle's law apparatus is compressed to a volume of 22.0 mL. If its original volume was 37.0 mL at 12,000Pa what is the new pressure of the gas sample. Show your calculations. 0/10000 Word Limit square .
Name this alkane: CH_(3)-CH_(2)-CH-CH_(2)-CH-CH_(2)-CH_(3) vert vert vert CH_(3) CH_(3) Spell out the full name of the compound. square
Experiment 1: Perform Qualitative Tests for the Group I Cations Part 1: Identify the Pb^2+ Ion 1. Take a clean test tube from the Containers shelf and place it on the workbench. 2. Take 0.2 M lead (II) nitrate from the Materials shelf and add 5 mL to the test tube. 3. Take 12 M hydrochloric acid from the Materials shelf and add 5 mL to the test tube. Is there a precipitate? If so what color is the precipitate? Record your observations Data Table 1. 4. Take a second test tube from the Containers shelf and place it on the workbench. 5. Decant the liquid from the first test tube by moving it onto the empty test tube. Select the Decant option from the window that appears. 6. Discard the second test tube of liquid by emptying it into the waste than placing in the sink.
What is the net ionic equation of the following reaction? LiOH(aq)+HBr(aq)arrow H_(2)O(l)+LiBr(aq) Li^+(aq)+OH^-(aq)+H^+(aq)+Br^-(aq)arrow H_(2)O(l)+LiBr(aq) LiOH(aq)arrow Li^+(aq)+OH^-(aq) Li^+(aq)+Br^-(aq)arrow LiBr(aq) H^+(aq)+OH^-(aq)arrow H_(2)O(l) HBr(aq)arrow H^+(aq)+Br^-(aq)
At equilibrium, a reaction vessel contains 4.50 atm of Br_(2) and 1.10 atm of NBr_(3) According to the reaction: 2NBr_(3)(g)leftharpoons N_(2)(g)+3Br_(2)(g)Kp=4.8 Determine the equilibrium partial pressure of N_(2)
For a particular reaction K=98000 . What can be said about this reaction?
A chemist dissolves 331 mg of pure hydrobromic acid in enough water to make up 270.mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits. square
How many moles of ammonia gas equal 1.51times 10^24 molecules NH_(3) 2.51 mol 25.1 mol 0.399 mol 0.251 mol 3.99 mol
What is the molar mass of aspirin, C_(9)H_(8)O_(4) 252.25g/mol 180.17g/mol 244.17g/mol 116.08g/mol 29.02g/mol
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.
