Chemistry

The diagram shows Earth's position in its orbit around the Sun at the beginning of each seasonWhich position of Earth shows the Moon located where its shadow may sometimes reach Earth?
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Your teacher has set up an investigation for class today. The following materials are on the science lab table. Piece of unglazed white porcelain Iron pyrite Hematite Mica Talc Halite Magnetite Which property of minerals will you be testing for? A cleavage B density C hardness D streak
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What mass of sugar and water is needed to make 40 g of 10% solution?
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A student is studying the boiling points of six different liquids and finds results with consistently higher boiling points than what research would suggest. Which option describes a likely cause?
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what is the heaviest element on the periodic table
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10. Can you write an equation to describe this?(Investigating the pH scale)
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1. Why are the worlds rainforests so important?2. Predict solutions for slowing the loss of biodiversity. 3. Describe three ways humans are contributing to the loss of biodiversity. 4. How does the introduction of invasive, non-native species, threaten biodiversity?
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The model below shows the equation that represents how hydrogen and oxygen combine to form water. In this chemical reaction, the reactantsare hydrogen gas and oxygen gas.2H2 + O2 + 2H2OTrueFalse
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Anyone pls help me with science
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How many molecules are present in 2.00 mol of KCl?
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PLEASE HELP CHEMISTRY What is the hydronium ion concentration of a solution with a POH of 6.90?O 6.29 x 10-7 M6.53 x 10-7 M.O 7.18 x 10-8 MO 7.94 x 10-8 M
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A 0.500-g sample containing Na2CO3 plus inert matter is analyzed by adding 50.0 mL of 0.100 M HCl, a slight excess, boiling to remove CO2, and then back-titrating the excess acid with 0.100 M NaOH. If 5.6 mL NaOH is required for the back-titration, what is the percent Na2CO3 in the sample?
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Under what conditions do you expect hydrogen gas to deviate from ideal gas behavior? Explain your answer.
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What is the difference between an element, compound, and a mixture
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How long does it take an object to travel 50m at a rate of 8 m/s?
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Evaluate: (12)2 102 6.3 2.121.4 A22 B9.3 C75 D HELP PLS
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Bill sets up an experiment to determine and predict the velocity of a marble at the end of a track. He uses an electronic balance to weigh the marble. He then places the marble at the top of the track and releases it. Artie uses the time it takes the marble to pass through a photogate at the bottom of the track to calculate the velocity of the marble. ill notes that his prediction is significantly higher than his calculated velocity. Which error explains this difference? A) Bill forgot to account for friction. B) Bill forgot to zero the balance and found a weight for the marble that was too low. C) Bill weighed the marble in a weighing dish and failed to account for the mass of the weighing dish. D) Bill didn't position the photogate correctly and got the time required for the top of the marble to pass through, rather than reach the middle.
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why do atoms get smaller as you move across a period
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one liter of gas has a pressure of 150.00kPa at 25 degrees celcius. if the pressure increases to 600.kPa and the temperature to 100.0 degrees celcius, what would be the new volume of the gas
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What is freshly pumped oil called?
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what takes place when the pollen grains are transferred to the stigma of the same flower with the help of pollinators
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Describe in short about the paper chromatography.
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NEED HELP ASAP WILL GIVE BRAINLIEST
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Passive prostheses are:- self-regulated- easily corroded- made of nanotubes- self-powered
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