Chemistry

Cuando se queman combustibles que tienen algn compuesto de azufre se produce dixido de azufre (SO2), un gas irritante que puede provocar lluvia cida. En el anlisis del aire de una ciudad se ha encontrado una concentracin de SO2 de 14 mg/m^3 Qu cantidad de SO2 habr en 1 L de aire?
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Temperature and volume are_____ related, which means as temperature______the volume decreases.
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Does anyone know how to solve this
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Dr. Michelle Wang at Cornell University studies DNA replication and protein synthesis. Her group researches how a protein called helicase unzips the DNA strand.After DNA is unzipped, what is the next step in DNA replication?A.Messenger RNA forms along the exposed DNA bases.B.A chromosome with two identical strands of DNA is formed.C.Nitrogen bases pair up with the DNA strands.D.Ribosomes attach to DNA and move along the strand.
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explain a natural process, whiledescribe a natural process.
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Which phrase provides the best definition of mass movement?the movement of material caused by erosionthe slow flow of a glacier as it moves through the valley of a mountainthe movement of large amounts of soil and rock debris down a slopethe fast movement of a boulder rolling down a slope
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what is the mass of 7.525 x10^24 particles of sulfur difluoride SF2?
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How many moles of NaCl are contained in 100.0ml of a 0.20m solution
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Which chemical is responsible for opening the hair cuticle?APeroxideBAmmoniaPowder persulphateDNone of the above
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dentify the missing information for each atom or ion. Note that the atoms and ions are not necessarily neutral. A Se ion has a mass number of 78 and a charge of 2 . Determine the number of neutrons, protons, and electrons in this ion. number of neutrons: 44 number of protons: 34 number of electrons: 36 An ion has a mass number of 65, 36 neutrons, and a charge of +1 . Identify the element symbol, and determine the number of protons and electrons in this ion. element symbol: Cu number of protons: 30 number of electrons: 29 An atom or ion has 43 neutrons , 36 protons, and 36 electrons. Identify the element symbol, and determine the mass number and charge for this atom or ion. element symbol: Au mass number: 79 charge: 0
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Which of the following is stored in the skeletal system?A. potassiumB. calciumphosphorousD. sodium
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What causes metamorphic rocks to form from cristing rocks?A.magma and mineralsB.heat and pressureC.exposure to Earth's mantieD.exposure to Earth's surface
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What amount of heat will raise the temperature of 78g liquid water from 20 C to 80 C?
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How are renewable fuels different from fossil fuels
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A reaction starts with 20.0 g of lithium hydroxide (LiOH) and actually produces 31.0 g of lithium chloride (LiCl), what is the percent yield? (Hint: First calculate the theoretical yield of lithium chloride (LiCl))64.5%88.6%81.5%92.8%
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PLEASE help! BRAINLIEST to right answer!
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I need simple answers that a 14-year-old would understand.What are valence electrons?What is the difference between the Rutherford and Thompson plum pudding model?What relative scale for atoms do chemists use? Why do they use this?Compare and contrast alpha, beta and gamma decay of radionuclides.Explain why radiation is dangerous for living cells but can be applied to treat people with some forms of cancer.Explain why oxygen atoms ionise to form the oxide ion with a charge of 2. Identify if oxide is an anion or a cation.
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Select the single best answer.Predict the pH (> 7, < 7, or = 7) of a LiHCO3 solution.
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To make a is to settle a disagreement by giving up some personal demands
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An insulator,Keeps electrons inside the nucleus of an atomAllow electrons to move easily through an objectIs when electrons cannot move through objects easily
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Sulfuric acid (H2SO4) has a molar mass of 98.1 g/mol. How many oxygen atoms are found in 75.0 g of H2SO4? A. 1.15 10^23 B. 1.84 10^24 C. 4.61 10^23 D. 7.87 10^23
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What causes eclipses? select three options
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what is the compound of libr
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Which has the highest rate of effusion oxygen or hydrogen
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