Master Chemistry with Fun Quizzes & Brain Teasers!

What is the role for dna in determining an organisms traits?
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Analyzing a blood sample usually involves which type of separation method?screeningdistillationcentrifugationfiltration
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Which of the following reactions will proceed as drawn below? (Yes or No)
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Ionic compounds tend to be ...A. HardB. SoftC. Bendable
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Several dams on the Colorado River in Texas produce electricity through hydropower. What isan advantage of this type of energy production?A: land is flooded when dams are built B:Dams improve biodiversity by creating lakes out of riversC:hydropower provides renewable energy for human useD:electricity can only be generated during daylight hours
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How can you use probability to predict the outcome of a codominant cross?
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Identify each of the changes listed below as chemical or physical.Evaporation of Water ________________Digesting Food ______________________Rotting Wood ______________________Rusting Car ______________________Drying Clothes ______________________Souring Milk ______________________Baking a Cake ______________________
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The atomic notation for a particular atom of boron is ' B. Theatomic number is while the mass number is
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* Sodium has an atomic number of 11 and a mass number of 23.Which of the following are the correct number of protons,neutrons, and electrons, respectively, in a neutral sodiumatom?
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What are the factors affecting your limitations? How about possibilities?
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example of physical property
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Given the unbalanced reaction: NH3 + O2 N2 + H2O. When properly balanced, the sum of the balancing coefficients is 8. 12. 15. 14.
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The movement of substances from an area of low concentration to an area of high concentration is called what?
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Which temperature is warmer 0 F or 0C
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What is the mass of 18.5 moles of iron?
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The research and design team of a car manufacturing company is developing a new safety product that automaticallytests a car's brakes. When the team discusses how exactly they plan to determine whether the new technology issuccessful or not, what stage of technological design are they in?O firstO secondthirdO fourth
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Assuming that a cheese sandwich consists of 2 slices of bread and 3 slices of cheese, determine the number of whole cheese sandwiches that can be prepared from 44 slices of bread and 63 slices of cheese.
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A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave
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A reef that surrounds a volcanic island is an
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Which of the following is an example of a diatomic molecule?2HO2CH4H2O
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Which 2 statements best describe the effects of ocean currents on weather?A. Warm currents cause the air above them to take up less moisture than cold currents do.B. Cold currents are cold because they absorb thermal energy from the air above them.C. Warm currents warm the air above them.D. Cold currents remove thermal energy from the air above them.This is due today please help me!
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The rock has a mass of 7.9g and a volume of 3.0 cm3. What is the density of the rock?
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Question: Describe how molecules wouldmove in a piece of ice.
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Phenolphthalein turns litmus paper what color?
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