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Assessment look like in the science classroom

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What does assessment look like in the science classroom and why is it important?

Reference no: EM131635237

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Chemistry Questions & Answers

  What volume will the gas occupy

2.0 moles of a gas was collected in the lab at a temperature of 1.1 degrees C and a pressure of 9.5 atm. What volume will the gas occupy under these conditions.

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If 62.0 g of NH3 and 35.0 g of oxygen gas react, which is the limiting reagent.  How much NO2 is produced

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Blocks mass is 50.0 g in air. while placed in water (20 Celcius, d=.99821 g/cm3), the block only weighs 5.6 grams. Explain what is density of the block

  Compute the enthalpy change to be expected from the reaction

Use Hess's law and the measured mean enthalpy changes for the NaOH-HCl(36.2) and NH3-HCl(31.9) reactions to calculate the enthalpy change to be expected from the reaction: NaOH + NH4Cl----NaCl + NH3 +H2O

  Graphite is the crystalline form of carbon used in lead

Graphite is the crystalline form of carbon used in lead pencils. How many moles of carbon are there in 305 mg of graphite? (b) Manganese (Mn) is a transition element essential for the growth of bones.

  Define the total pressure in the system containing n2o5

find the time required for the total pressure in the system containing N2O5 at an initial pressure of 0.1 atmospheres to raise to 0.145 atmosphere

  Define the iodine as agi according to the following reaction

Problem- Warfarin (C19H16O4, 308.34 g/mol) converted to CHI3. One mole of CHI3 was produced for each mole of warfarin that reacted. The collected CHI3 was reacted with silver to precipitate the iodine as AgI according to the following reaction.

  Explain what is the calculated yield of the ester

the reaction of a particular alcohol with a carboxylic acid is 3.83. What is the calculated yield of the ester?

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What is the function of the sodium thiosulfate in studying the kinetics of the hydrogen peroxide-iodide reaction?

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Propose a synthesis of ethyl isopropyl ether from isopropyl alcohol using the Williamson ether synthesis.

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Why is saturated sodium chloride solution, rather than dilute solution specified for the final washing of the 2-chloro-2-methylpropane produced? (created from 2-methyl-2-propanol)

  How many grams of co2 were produced

when a .28 gram sample of limestone was decomposed by heating 75 millileters of CO2 at 750 mm Hg and 20 degrees celcius were evolved. How many grams of CO2 were produced?

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