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4 years ago

15

I NEED HELP FAST!!!!! Can you tell me about examples of physical and chemical compounds of matter??? I have a DBA in a few minut

es and I don't know!!! Please use easy to understand answers 'cause I'm a little under the weather.

1 answer:

o-na [289]4 years ago

7 0

Physical<span> properties </span>can<span> be observed or measured without changing the </span><span>composition of matter</span>

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Assume that your electrical power company gets its energy from a hydroelectric dam. Outline all of the energy changes that occur

Rina8888 [55]

Answer:

See explanation.

Explanation:

This isn't chemistry. Its physics. Kinetic energy (water) to electric energy (dam) as the hydroelectric dam works. Then, as the current travels from the plant to your crib, electric energy to heat energy (wire resistance). Then when you are using the dryer electric energy to heat energy (hot air) and sound energy (air particles vibrate due to the heat energy).

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2 years ago

While hiking in a rural area, you encounter a wetland and conclude that it's a swamp. Which feature helped you reach this conclu

german

Answer: B. It's located near a lake.

Explanation:

A swamp is a kind of wetland which can found near the shores of the lakes. Many swamps also occur along the shores of the rivers. These are dominated by the aquatic vegetation. The swamp wetland is exposed to soil saturation due to surface runoff.

According to the above explanation, It's located near a lake is the correct option.

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4 years ago

How many moles of H2 are needed to produce 18 moles NH3 in the reaction below?

Sophie [7]

Answer:

27 moles of H₂

Explanation:

Equation of reaction:

N₂ + 3H₂ → 2NH₃

From the equation of reaction,

3 moles of H₂ is required to produce 2 moles of NH₃

3 moles H₂ = 2 moles of NH₃

X moles of H₂ = 18 moles of NH₃

X = (3 * 18) / 2

X = 27 moles of H₂

27 moles of H₂ is required to produce 18 moles of NH₃

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4 years ago

if the density of water is 1 g/ml, what would happen to an object with a mass of 80 g and a volume of 100 cubic cm when you plac

Nastasia [14]

Answer:

<em>that</em><em> </em><em>obj</em><em>ect</em><em> </em><em>will</em><em> </em><em>float</em><em> </em><em>on</em><em> </em><em>the</em><em> </em><em>water</em>

Explanation:

Since the density of water is greater than that of the object , the object will float on the water.

NB. Density of the object=

$\frac{mass}{volume}$

Given that mass of the object is 80g and volume 100cm^3

substituting them in the formula

Density=80g/100cm^3

Density=0.8g/cm^3

<em>sin</em><em>ce</em><em> </em><em>0</em><em>.</em><em>8</em><em><</em><em>1</em><em> </em><em>whi</em><em>ch</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>dens</em><em>ity</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>obj</em><em>ect</em><em> </em><em>and</em><em> </em><em>water</em><em> </em><em>respect</em><em>ively</em><em>,</em><em> </em><em>the </em><em>obj</em><em>ect</em><em> </em><em>will</em><em> </em><em>float</em><em>.</em>

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3 years ago

What are some safe ways to dispose nuclear waste?

alex41 [277]

Answer:

Under water for at least five years and then often in dry storage

Deep geological disposal

world-nuclear.org

4 0

2 years ago

Read 2 more answers