Master Chemistry with Fun Quizzes & Brain Teasers!

Is Salt and pepper an example of a homogenous mixture?
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What is the mass of 3.15 moles of calcium sulfate, CaSO4?
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T/F: The electromagnetic force holds negatively charged electrons in orbit around thr positively charged nucleus of an atom
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A piece of an unknown substance has a volume of 2.5 mL and a mass of20 grams. What is the density of this substance?
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What is the electron configuration of the element in period 2 that has 5 valence electrons (valence electrons are the electrons in the outermost shell) *
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Calculate the volume of an object (in mL) if the density of the object is 4.08 g/mL and the mass of the object is 10.02 g. Round your answer to one decimal.
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Do hot things, like water or magma, always rise?
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what is a a metamorphic rock
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Name given to the type of microscope that only has one lens.
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what are the Defence of keeping our body safe from diseases and viruses
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how does adding energy to an atom affect its electrons
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Which is the variable that you are measuring and observing for?O Dependant VariableIndependant VariableConstantO Exponent
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Which material will heat the fastest?
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What sort of bond would you expect the following two atoms to have together?iodine (I) and iodine (1)O Polar covalent bondO lonic bondO Nonpolar covalent bond
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Classify each of these as a heterogeneous or homogeneous mixture
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H2S(aq) + Ca(OH)2(aq)
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A cubic piece of platinum metal (specific heat capacity = 0.1256 J/Cg) at 200.0C is dropped into 1.00 L of deuterium oxide ('heavy water,' specific heat capacity = 4.211 J/Cg) at 25.5C. The final temperature of the platinum and deuterium oxide mixture is 41.9C. The density of platinum is 21.45 g/cm and the density of deuterium oxide is 1.11 g/mL. What is the edge length of the cube of platinum, in centimeters?
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Which of the following contains the most electrons?multiple choice A - Sn2+ B - Sna+C - Both have the same number of electrons
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Determine the Molar mass of NI3
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A car travels with a speed of 91.4 kilometers per hour (km/hr). Convert this speed to meters per second (m/s). Show your work.Round your final answer to three significant figures.Type your answer...
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How many NH4+ ions are in 550 mg of (NH4)3PO4? My professor usually goes over our in class assignment in class and then assigns us a weekly assignment to finish for homework with the problems being similar to what she has explained. We didn't go over one like this and I don't know how to approach it.
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What is the volume in milliliters of 8.00 g of acetone?
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How do you define medium and high level profession?according to class 8? please give this answer quickly
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Select the correct answer.In which research method does a researcher change the value of one variable to determine how the change affects another variable?O A experimentOB. observational researchOc.surveyODcase study
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