Master Chemistry with Fun Quizzes & Brain Teasers!

7. How many kilograms are equal to 3.3 scruples?
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how might the atoms that make up bones be different from the atoms that make up soft tissue?
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Which determines the reactivity of an alkali metal?A) its boiling and melting pointsB) the shininess of its surfaceC) the number of protons it hasD) its ability to lose electronsill give brainliest
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Scientific theories are always
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how do you find time when you have been given the distance
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Scientific theories are always?
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A mineral forms from water at the edge of a lake.Which statement best describes this mineral?A) The mineral formed from lava.B) The mineral formed through evaporation.C) The mineral formed when hot water cooled.D)The mineral crystallized from magma.
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is adding tomato sauce to pasta a chemical or physical change
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Which of these elements would have the largest atomic radius?
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Question 1Ernest Rutherford completed his famous gold foil experiment in 1911. In this experiment, alpha particles were fired at a thin sheet of gold foil. He observed that most of the alpha particles passed straight through the gold foil unimpeded, but a small number of alpha particles were deflected. Which of the following conclusions about atomic structure were made from Rutherfords gold foil experiment?
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Which of the following statements is correct about the force of gravity between two objects? A. it depends on the shape of the objects.B. It is weaker when the objects are closer.C. It depends on the temperature of the objects.D. It is stronger when the objects are closer.
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An aspirin tablet has 300mg of active ingredient. How many grams does thatequal?
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What atom has 35 protons and 47 neutrons ?
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An organ like the brain is considered to be a living thing, how is it possible?
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A piece of metal has a mass of 147.8g. When dropped into a graduated cylinder, the metal displaces 18.5ml of water. What is the density of the metal?
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which of these has the highest frequency?ultraviolet lightradio waves xrays microwaves
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True or False: Positive ions have more electrons than protonsO TrueO False
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The mass of an atom is determined by the number of protons the element has. The more protons, the heavier the element.True or False
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A pure, liquid substance is held over a heat source. Slowly, all of the liquid evaporates and transforms into a gas, which is captured by a balloon.The gaseous substance and the liquid substance A. have different masses. B. have the same volumes. C. have different compositions. D. have the same composition.
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If an object has a mass of 42 kg and a volume of 2m3 what is its density
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Anyone know about this ?
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Please help with my chemistry homework
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HURRY!! 30 points!! In the process of photosynthesis, plants use carbon dioxide, water, and energy to form carbohydrates and oxygen Which of the following best explains how plants follow the Law of Conservation of MassThe reaction uses energy to produce a product without energyA gas (carbon dioxide) and a liquid (water) use energy to produce a solid (carbohydrates).The amount of each element that begins photosynthesis equals the amount of each element that is producedThe amount of carbohydrates at the beginning of photosynthesis equals the amount of oxygen that is produced
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A student estimates that 27 students will attend this month'sScience Club meeting 34 students attend. What was thestudent's percent error?
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