Chemistry

Which 2 characteristics do all magnets have? Check all that apply.1. Attraction2. Repulsion3. Amplitude4. Frequency
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How many hydrogen atoms are in 5CH3COOH?
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What is the original source of all energy for animals? (1 point) A. the sun B.sugars C.other animals D.plants
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The compound of ammonium sulfate consists of two ions. NH4+ and SO42- both of which are polyatomic ions. a molecule of the compound consists of (one, two , or four) NH4+ ions and (one, two, or four) SO42- ions?
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The____ is the basic unit of life
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Name one nutrient indicator and explain how it works.
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40 PIONTS!! PLZZZZ HELPDetermine whether each of the following will undergo dissociation, dissolving or ionization. Then write the solvation equation for each substance:a) Lithium oxide b) Magnesium nitride c) Hydrobromic acid
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How many grams of hydrogen gas are needed to react completely with 54.0 g of oxygen gas, given the following balanced chemical reaction:2H2 +O2 --->2H2O
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The molecular formula for a compound with a molar mass of 180.18g that contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass is
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If a 425 gram sample of Uranium-235 had a half-life of 8 days, how much of the sample would remain after 16 days?type your answergrams
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Mass is the amount of matter in an object, butweight isA. the size of the matter.B. the amount of space matter takes up.C. the shape of the matter.D. gravity's pull on the matter.
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Which sentence best describes what happens during a change of state from a solid to a liquid?A. The temperature stays the same and the particle speed increases B. The temperature increases and the particle speed stays constant. C. The temperature decreases and the particle speed decreases. D. The temperature stays the same and the particle speed stays constant.
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Whats clues indicate that a chemical reaction has occurred?
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Which neutral atom is isoelectronic with N-3?
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The clouds of Venus consist mainly of ______. Group of answer choices carbon monoxide droplets of water vapor hydrogen and helium droplets of sulfuric acid gaseous nitrogen
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What is the chemical composition of dry ice?
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Which statement best describes the skier? The skier has potential and kinetic energy. The skier has only potential energy. The skier has only kinetic energy. The skier does not have potential or kinetic energy.
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explain why titanium conducts electricity
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How many grams are in 3.4 moles of Lead (IV) Sulfate (Pb(SO4)2)? ) Molar mass: 303.26 g/mol 131.0840
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Please answer!!No links.Picture is includedThe graph below displays the temperature and volume of a sample of a gas. What does the graph show.A. The volume and temperature of the gas are not relatedB. As the pressure of a gas increases its volume decreasesC. If the temperature of a gas doubles then its volume will also doubleD. As the volume of the gas increases its temperature decreases
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Why are polyatomic called radicals
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HELLLPPPP ASAP !!!! Pls
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Why do scientists often use melting point and boiling point to identify substances?
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2) Imagine that a loudspeaker is producing quiet note with a low pitch How will its viberation change a) If the pitch of the note becomes higher? b) If the note become louder
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