19. how much will the temperature of a cup (180 g) of coffee at 95 °c be reduced when a 45 g silver spoon (specific heat 0.24 j/g oc) at 25 °c is placed in the coffee and the two are allowed to reach the same temperature assume that the coffee has the same density and specific heat as water.
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Chemistry, 21.06.2019 23:10
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Chemistry, 22.06.2019 15:00
Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?
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Chemistry, 22.06.2019 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
Chemistry, 22.06.2019 17:20
Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.
Answers: 2
19. how much will the temperature of a cup (180 g) of coffee at 95 °c be reduced when a 45 g silver...
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