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A worker pushes horizontally on a large crate with a force of 300 N, and the crate is moved 5.0 m. How much work was done? How much work is required to lift a 4.0-kg concrete block to a height of 2.0 m?
how many calories are given to a household radiator when 1000 grams of 100c steam condences and drops in temperature to
The mass of the sample after heating is 2.9167 g. The metal was then isolated and was found to have a mass of 1.0723 g. How many moles of water are in the hydrated salt. Write the formula of the hydrated salt. The molar masses of Fe, SO42-, and H2..
Dentists might use a mixture of 40% N2O and 60% O2 as an initial anesthetic of nitrous oxide(although exact proprtions may vary). Determine the entropy of mixing for 1 mole of such a mixture. Assume ideal gas conditions.
What is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of V2O5 with 40.0 g of calcium based on the following chemical reaction?
what is the final temperature of the block after the evaporation of the alcohol. Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block
The specific rotation of Compound X is +15.2o. A mixture of Compound X and its enantiomer are placed in the polarimeter and the observed rotation is -5.1o. Which enantiomer is in excess? (+ or -) Calculate the enantiomeric excess.
hexokinase is an enzyme that catalyzes the phosphorylation of sugars. given the values below discuss the interaction of
Use the van der waals equation and data in the text to calculate the pressure exerted by 18 gram of H2 at 20C in a 1.00L container. Repeat the calculation assuming that the gas behaves like an ideal gas.
Question- Show the step by step synthesis of Gly-Ala-Phe using the Merrifield protein synthesis. Show the structure for BOC and other relevant pieces at least once before you start abbreviating them.
Question- In the recrystilization step of aspiring synthesis, why should you not add boiling H2O to the ethanol solution
a 54.0 g ice cube initially at 0degc is dropped into a styrofoam cup containing 375 g of water initially at 21.2degc.
How many seconds would it take to deposit 0.500 g of Ni metal on an electrode by passing a 3.00 amp current through a solution of Ni2+
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