Master Chemistry with Fun Quizzes & Brain Teasers!

Calculate the wavelength of light (in nm) of the spectral line of Hydrogen where an electron falls from the 6th Bohr orbit to the 3rd Bohr orbit. a) 540 nmb) 2000 nmc) 1090 nmd) 1050 nm
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Rocks that undergo weathering and emulsification result in which type of rock?IgneousMetamorphicSedimentary
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Pls help :PWhich 2 letters have the most kinetic energy?
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3. Two boxes need to be moved. Box A is 10 kg. Box B is 3 kg. Which box will 1 pointrequire more force to move?BOXABOX
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Quais so os trs tipos de tecidos musculares? E)celulas,estriado esqueletico, estriado liso. B)esttiadi esqueletico, liso, estriado cardiaco c)estriado liso, estriado esqueletico, estriado cardaco. D)liso, celulas, esteiado cardaco. ESSA PERGUNTA E DE CIENCIAS MAS NAO TEM VIENCIAS ALI PRA ESCOLHER;-;.
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All surfaces have texture, which means it affects how things move over it. When it takes a long time for friction to slow down an object, what is most likely true about the surface the object is moving on? The surface is dry. The surface is rough. The surface is uneven. The surface is smooth.
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Alexandra is preforming this combustion reaction i lab: C3H8 + 5O2 + 3CO + 4h20. If she carefully measures out 220 g of C3H8 and discovers she has produced 660 g of carbon dioxide and 360 g of water, how many grams of oxygen must have been required to react with the C3H8?
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what is the hydronium ion concentration in a solution formed by combining 750mL of 0.10M NaOH with 250mL of 0.30 M HCl
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What is the role of an electron in an atom
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Copying is not allowed. You must show all work in order to receive credit. Naturally occurring silver has two isotopes. Isotope A has a relative mass of 106.9051 and an abundance of 51.82%. Isotope B has a relative mass of 108.9047. Calculate the atomic mass of silver from these data.
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Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients. A precipitate forms when aqueous solutions of lead(II) nitrate and sodium hydroxide are combined.
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What quantity (moles) of NaOH must be added to 1.0 L of 1.8 M HC2H3O2 to produce a solution buffered at pH
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What can you use to get rid of paint A. thinner B. water C. Soda. D. cough medicine
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What happens to the atomic radius when an electron is lost?A. The positive ionic radius is the same size as the neutral atomicradius.B. The positive ionic radius does not follow a trend with the neutralradius.C. The positive ionic radius is smaller than the neutral atomic radius.D. The positive ionic radius is larger than the neutral atomic radius.
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Which property do solutions with high pH values have?gives off hydrogen gas when reacted with metalturns litmus paper redtastes sourfeels slippery
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How many total atoms are in the formula 2H2SO4
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Item 10What color do acids turn litmus paper?yellowredpinkblue
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In a solution, the particles of different substances are ___ a. mixed evenly, b. never mixed, c. mixed unevenly, d. separated from each other. PLEASE ANSWER ASAP TY
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Which solution, NaCl(aq) or CH3OH(aq), conducts electricity?
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Calculate the solubility of Zn(OH)2 in water at 25C.
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What is the difference between liquid, molten steel, and solid steel?energythe material it is made out of
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The atmospheric conditions that exist for a long period of time in a given area are called what?
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What happens to a solute?A. It gets dissolved in something else.B. It settles out of the solution.C. It forms a solid in the solution.O D. Something gets dissolved in it.
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A car with a mass of 800 kg is accelerated with a force of 6000 N. If resisting forces are ignored, what is the acceleration of the car? yen
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