Chemistry, 01.10.2019 22:20 savannahckatz

Apure gold ring (c = 0.128 j/g°c) and pure silver ring (c = 0.235 j/g°c) have a total mass of 16.891 g . the two rings are heated to 66.887 oc and dropped into a 13.9 ml of water at 21.9 oc. when equilibrium is reached, the temperature of the water is 24.2 oc. what is the mass of gold ring? (assume a density of 0.998 g/ml for water.)

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Answer from: gg808

Explanation:

The total mass will be as follows.

Total mass = mass of silver ring $(M_{s})$ + mass of gold ring $(M_{G})$

And, heat lost by gold and silver rings = heat gained by water

$[M_{G} \times 0.128 J/g^{o}C \times (66.887 - 24.2)^{o}C] + [M_{s} \times 0.235 J/g^{o}C \times (66.887 - 24.2)^{o}C]$ = $13.9 ml \times 0.998 g/ml \times 4.18 J/g^{o}C \times (24.2 - 21.9)^{o}C$

$42.687 (0.128M_{g} + 0.235M_{s})$ = 133.368

$0.128M_{g} + 0.235M_{s}$ = 3.124

$0.128M_{g} + 0.235 (16.891 - M_{g})$ = 3.124

$0.128M_{g} + 3.969 - 0.235M_{g}$ = 3.124

$0.107M_{g} = 0.845$

$M_{g}$ = 7.897 g

Thus, we can conclude that the mass of gold ring is 7.897 g.

Answer from: Quest

water molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

Answer from: Quest

well, they made a movie about how animals lived there.

rotten tomato score 95%

note: mark other user brainliest.!

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Apure gold ring (c = 0.128 j/g°c) and pure silver ring (c = 0.235 j/g°c) have a total mass of 16.891...

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