Chemistry

discuss why people use the scientific method
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calculate the energy of a photn of red light with a wavelength of 6.45x10^-5cm
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Choose all the answers that apply.Whats is the freezing point of water?1. 0c2.32c3.32F4.0F
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How many grams of oxygen would be contained in 4.00 L at 158kPa and 28 C?
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1. How many centimeters are in 13.4 inches?
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If there is a name/surname you can't make out due to a speaker's manner of speech, what are you supposed to do?
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need answer asap .. -20 points! asap please ..
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`Carbon Dioxide and Water are the _______ in a chemical reaction. 2. Reactants are also called the starting _______ in a chemical reaction.: Reactants are also called the starting _______ in a chemical reaction. 3. This type of energy comes from the sun: a This type of energy comes from the sun 4. You get this type of energy from food: b You get this type of energy from food 5. The process by which plants use the sun to produce glucose and oxygen.: The process by which plants use the sun to produce glucose and oxygen. 6. The products of photosynthesis: The products of photosynthesis 7. The location of photosynthesis in plant cells: The location of photosynthesis in plant cells 8. Another name for glucose is: Another name for glucose is 9. Energy is provided by this cell organelle during cellular respiration: Energy is provided by this cell organelle during cellular respiration 10. The largest source of energy on earth comes from the: d The largest source of energy on earth comes from the Column B a.Chloroplast b.Ingredients c.Reactants d.Sun e.Radiant energy f.Sugar g.Chemical energy h.Glucose and Oxygen i.Mitochondria j.Photosynthesis
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Alison observes that when she injects additional gas molecules into a container of gas, the number of collisions in the container (and the pressure inside) increases. She then increases the volume of the container just enough to restore it to its original pressure. Which of the following laws best describes what Alison observed?A. Amonton's Law B. Avogadro's Law C. Boyles LawD. Charles's Law E. Dalton's Law
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For her farm, Susan is interested in increasing the number of chickens that lay the most eggs per week. Many of the chickens on her farm lay 6 eggs a week. A few female chickens (hens) lay as many as 8 eggs per week, while other female chickens only lay 4 eggs per week. Describe what Susan can do to increase the number of eggs produced on her farm.
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Ethanol (C2H5OH) reacts with oxygen gas in a combustion reaction. How many liters of carbon dioxide gas are produced at STP when 375 mL of a 75.0% ethanol solution by mass with a density of 1.22 g/mL reacts with excess oxygen?
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What is the best description of cirrus clouds?Question 5 options:High level (altitude) clouds that are white and wispy like horses tails.Low level (altitude) clouds that are wispy and made of ice crystals.Middle level (altitude) clouds that are thick and spread out like a blanket.Middle level (altitude) clouds that are white and puffy with flat bottoms.
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7How many grams are there in 5 moles of CO2?A 225.5 gB) 220.05 gC)240 gD) 230 g
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Rain is-pouring down on you. Your friend asks where so much watercame from. You explain that the water could once have beena) in a lake.c) in an ocean.-b) in-a river.d) any of the above.
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A gas in a rigid container at 25C has a pressure of 0. 96 atm. A change in temperature causes the pressure to increase to 1. 25 atm. What is the new temperature of the gas? Use StartFraction P subscript 1 over T subscript 1 EndFraction equals StartFraction P subscript 2 over T subscript 2 EndFraction. ""44. 2C 32. 6C 115C 388C.
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How do molecules work?
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How many moles of CH, are present in a 13982.87 gram sample of CHg?
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4. How are isotopes of the same element different? Select all that apply.[]They have different masses.[]They have different numbers of electrons.[]They have different numbers of neutrons.[]They have different numbers of protons.
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which tool would be best for measuring centimetersA. Metric ruler B. Balance scaleC. Meter scaleD. Measuring tape
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OOO OOOWater's strong hydrogen bonds result in which physical properties? Check all that apply.high boiling pointlow boiling pointhigh specific heatlow specific heatdensity of ice being less than that of liquid waterdensity of ice being greater than that of liquid water
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001 10.0 pointsIf you mix 4.5 g of HCl in enough water tomake 0.9 L (900 mL) of solution, what is themolarity of the solution?Answer in units of M.
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Consider the reaction below. 2H2 O2 Right arrow. 2H2O How many moles of water are produced from 13. 35 mol of oxygen? 6. 675 mol 26. 70 mol 53. 40 mol 66. 75 mol.
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What is the molarity of the nitric acid solution if 20.5 mL of a 0.125 M lithium hydroxide solution are needed to titrate a 25.0 mL sample of the nitric acid solution
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NEED HELP ASAP WILL GIVE BRAINLIEST
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