Master Chemistry with Fun Quizzes & Brain Teasers!

true or false applied chemistry does not have a specific goal or application
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The dotted line between 0- and H+ represents a-0)A)covalent bond between the two oppositely charged ions.B)ohydrogen bond, a weak bond between a hydrogen and an electronegativeatom.strong, short-distance bond that is responsible for the unique properties ofwater.polar covalent bond that results from the unequal and opposite charges ofthe ions.D)
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Which function do pygmy rabbits serve in a desert?OA) eat sagebrushB) make their own foodC) perform photosynthesisD) convert light energy to chemical energy
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How many moles of nitrogen gas (N2) are found?
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What do isotopes of an element contain?
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can you pls tell me the net ironic equation of H(aq) + O(aq) + Mg(aq) + SO(aq) Mg(aq)+SO(aq) + HO(l) please its urgent
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how do you determine how many electron energy levels an element has
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the force that one surface exerts on another when the two rub against each other is called _
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a _ is a push or pull
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what is one thing that would make evidence from an experiment more reliable? A if there was no comparison group B if there was a small sample C if the source of the information was an expert D it is not D i tried D already
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HELP. what are van der waals forces?
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Imagine designing an experiment in which the presence of a gas is determined by simply listening to the gas with your ear. The human ear can detect pressures as low as 2 x 10^-5 N*m^-2. Assuming that the eardrum has an area of roughly 1 mm^2, what is the minimum collisional rate that can be detected by ear? Assume that the gas of interest is N2 at 298 K.
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A balloon occupies a volume of 44 L at 200K, what will the temperature of the balloon become if it is changed to 500K?
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5 uL of a solution is equal tohow many nanoliters?
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What is the chemical formula for ammonium carbonate?(NH4)2CO3(NH4)HCO3NH4(CO3)2NH4(CO3)
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The decomposition of nitrogen dioxide is described by the following chemical equation: 2NO_2 (g) --------> 2NO (g) + O_2 (g) Suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction: NO_2 (g) --------> NO_(g) + O_(g) Suppose also that the second step of the mechanism should be bimolecular. a) Suggest a reasonable second step. That is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.
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the amount of matter in an object is called
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A 1 liter solution contains 0.247 M nitrous acid and 0.329 M sodium nitrite. Addition of 0.271 moles of calcium hydroxide will: (Assume that the volume does not change upon the addition of calcium hydroxide.) a. Raise the pH slightly b. Lower the pH slightly c. Raise the pH by several units d. Lower the pH by several units e. Not change the pH f. Exceed the buffer capacity
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For 1 dish of potato wedges, you will need 5 potatoes , 2tbs pepper, and energy. You need to make 80 batches of potato wedges. How many potatoes do you need? Do you have enough?
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What is the net electric charge of an ionic compound?
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Beginning with interphase, use the letters to order the following events:A prophaseB telophaseC metaphaseD interphaseE anaphase
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Which of the following objects has the greatest kinetic energy
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What is the condensed formula for 2-pentyne??
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The quantity of antimony in a sample can be determined by an oxidationreduction titration with an oxidizing agent. A 5.85 g sample of stibnite, an ore of antimony, is dissolved in hot, concentrated HCl(aq) and passed over a reducing agent so that all the antimony is in the form Sb3+(aq). The Sb3+(aq) is completely oxidized by 26.6 mL of a 0.125 M aqueous solution of KBrO3(aq). The unbalanced equation for the reaction is:BrO3-(aq) + Sb3+(aq) ------> Br-(aq) + Sb5+(aq) (unbalanced)(A) Calculate the amount of antimony in the sample and its percentage in the ore.
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