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2 years ago

Why does a pan of warm water eventually become the same temperature as the room it is in

Chemistry

1 answer:

rewona [7]2 years ago

4 0

the room will either cool down or warm up the water until it is the same temperature as the room around it.

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How do scientist determine by using frogs to study their environment

Lilit [14]

They use frogs because it easy to get and shows what is going on by what they eat what happened to them and other things.

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3 years ago

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Weather is influenced by global patterns of atmospheric movement. Winds and

Sholpan [36]

Winds and ocean currents are evidence for the process of regulating and stabilizing the climate patterns.

<h3>What are winds and ocean currents?</h3>

Ocean current is the flow or movement of water in a direction by gravity, wind, and difference in density of the water.

Wind currents pull water and create ocean currents. The current flow to westwards, which is called Coriolis effect.

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2 years ago

When a cold pack is used, ammonium chloride mixes with water and energy is absorbed from the water to reduce the temperature of

Leto [7]

I think the answer is Endothermic. Since the question says "absorbs," endo means to "go in" sort of and exo means to exit.

exo = exit
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(A trick my teacher taught us)

Sorry if I'm wrong, hope I helped. :)

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2 years ago

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NASA's Parker Solar Probe is currently en route to the outer corona of the sun. At its closest approach it will be traveling at

Digiron [165]

Answer:

$120.822\frac{mi}{s}$ will be the speed in $\frac{mi}{s}$

Explanation:

This is a unit conversion problem.

To solve it, we need the equivalences between km and ft, ft and mi and hr and s.

The equivalences are :

$5280 ft=1 mi\\1km=3280.84 ft\\1hr=60 min\\1min=60s$

If $5280ft=1mi$ then

$\frac{5280ft}{1mi}=1\\\frac{1mi}{5280ft}=1$

The trick is to multiply by one the speed given until to convert it in mi/s units

$(7.00).10^{5}\frac{km}{hr}.\frac{3280.84ft}{1km}.\frac{1mi}{5280ft}.\frac{1hr}{60min}.\frac{1min}{60s}=120.822\frac{mi}{s}$

Notice that km,ft,hr and min have been cancelled.

Be careful of the fraction order.

Multiply by ft/km is different that multiply by km/ft

6 0

2 years ago

For the reaction 2H 2 +O 2 2H 2 O calculate the percent yield if 860. of water is produced when 100. g of hydrogen react with an

-BARSIC- [3]

The percent yield : 95%

<h3> Further explanation </h3>

Given

Reaction

2H₂+O₂ ⇒2H₂O

Required

The percent yield

Solution

mol of Hydrogen(as a limiting reactant) :

$\tt \dfrac{100}{2}=50$

mol H₂O based on H₂ , and from equation mol ratio H₂:H₂O=2 : 2, so mol H₂O = 50

Mass of water(theoretical yield) :

$\tt mass=50\times 18=900~g$

$\tt \%yield=\dfrac{860}{900}\times 100\%=95\%$

3 0

2 years ago