Write this number showing three significant figures. Remember to round. 10,411

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Answer 1

Answer: 10,400 Is the answer

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A series of five short lines. The first has an up and a down arrow, and is labeled below 1 s. The second has an up and a down arrow, and is labeled 2 s. The third has an up arrow and no label. The fourth has an up arrow and is labeled 2 p. The fifth has an up arrow and no label. Which element is this?

Why is Fluorine, chlorine, bromine, and iodine grouped together?

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Fluorine, chlorine, bromine, and iodine grouped together because they have the same chemical and physical properties. They are also called halogens and under Group 7

Find the final equilibrium temperature when 15.0 g of milk at 13.0 degrees c is added to 148 g of coffee with a temperature of 88.3 degreesc. assume the specific heats of coffee and milk are the same as for water (c = 4.19 j/g•c), and disregard the heat capacity of the container.

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According to zeroth law of thermodynamics, when two objects are kept in contact, heat (energy) is transferred from one to the other until they reach the same temperature (are in thermal equilibrium). When the objects are at the same temperature there is no heat transfer.

So, at equilibrium, $q_(lost)$ = $q_(gain)$ , $q_(lost)= q_(milk)$ + $q_(coffee)$

q=m×c×T, where q = heat energy, m = mass of a substance, c = specific heat (units J/kg∙K), T is temperature

$q_(lost)= (15X13X4.19)+(148X88.3X4.19), (15+148)X4.19XT_(final)$ =(15X13X4.19)+(148X88.3X4.19)

$T_(final)$ = 81.37 ° C

Consider the processes I) NaCl(s) −→ Na+(aq) + Cl−(aq) II) CaCO3(s) −→ CaO(s) + CO2(g) III) H2O(ℓ) −→ H2O(s) For which cases would entropy of the system increase as the given process proceeds left to right? 1. I, II, III 2. I, II 3. III only 4. I, III 5. II only 6. II, III 7. I only

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Answer:

Option 2

In process I & II entropy of the system increases proceed from left to right.

Explanation:

Entropy is an extensive property of the system. It means it depends on the amount or quantity of the system

In case for process 1

since one mole sodium chloride dissolve in water and it dissociate into two ions i.e. Na⁺ and Cl⁻

For process 2

CaCO₃(s) → CaO(s) + CO₂(g)

Change in gaseous moles = (Product moles - reactant moles)

⇒ Δng = 1

Since Δng > 0 it means randomness increases of the system from left to right. So, ΔS > 0

Final answer:

Processes I (dissolving NaCl) and II (decomposition of CaCO3) show an increase in entropy, whereas process III (freezing water) shows a decrease. Therefore, the entropy of the system increases for processes I and II, not III.

Explanation:

The student has asked which processes have an increasing entropy as they proceed from left to right. Entropy is a measure of the disorder or randomness in a system, and changes in entropy can be predicted based on phases changes, the dispersion of matter, and the change in the number of particles in a system.

For the process of dissolving NaCl (s) into Na+(aq) and Cl-(aq), entropy increases due to the dispersion of the solid into ions, hence increasing the randomness of the system. Therefore, process I has an increasing entropy. In process II, we have CaCO3 (s) decomposing into CaO (s) and CO2 (g), leading to an increase in the number of gaseous molecules, which significantly increases entropy compared to the original solid state. Lastly, process III involves the transition of H2O (l) into H2O (s), which means that water is going from a more disordered liquid state to a more ordered solid state, decreasing the entropy of the system.

Considering these details, the entropy increases for processes I and II but decreases for process III. Therefore, the correct answer to the student's question is option 2, which indicates that entropy increases for processes I and II.

Learn more about Entropy Change here:

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A car motor oil was measured and described using kelvin. Which characteristic of matter was measured

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Kelvin is a unit for temperature. The temperature of the car motor oil must have been measured and described. At 0 degree Celsius or freezing point of water, there is 273 Kelvin. At the boiling point of water, it reads 373 Kelvin. This is the standard used by scientists in solving in equations. However, Celsius and Fahrenheit are common to daily basis.

which animal or plantlive in creek please list all of them and their names hurry i have to go please thanks

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Fishes: salmon, steelhead, rainbow trout, small minnow-like speckled dace, California roach and large minnow-like fishes.

Reptiles and amphibians: California red-legged frog, special-status northwestern pond turtles, Pacific tree frogs, Foothill yellow-legged frogs, gopher and garter snake, alligator lizards and western fence lizards

Birds: California clapper rail and California black rail

Invertebrates: mayflies, caddisflies, stoneflies,water boatmen, water striders, water beetles, dragonflies, California oysters, native clams, red abalone, Dungeness crabs

Plants:sedges, rushes, pickleweed, cord grass, gum plant, eelgrass, and mosses

an organic compound on analysis yielded 2.04g carbon, 0.34g hydrogen, 2.73g oxygen. calculate the empirical formula