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3 years ago

(they don't have science so I guess cemastry will do.)

Chemistry

1 answer:

DedPeter [7]3 years ago

7 0

warm air rises because of convection.

A student holds the back of his hand near an iron to see if it's hot. The heat transfer is conduction.

Warm water moves throughout a mattress because of ... why is there warm water in a mattress again? Convection, I guess.

In a swimming pool, the water near the surface is warmer because of convection and solar radiation; it's closer to the Sun than the bottom of the pool, so it receives more thermal radiation, making it warmer.

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Consider the following balanced reaction. How many grams of water are required to form 75.9 g of HNO3? Assume that there is exce

adoni [48]

Answer:

The answer is "10.84 g".

Explanation:

The formula for calculating the number for moles:

$\text{Number of moles }= \frac{\ Mass}{ \ molar \ mass }$

In the given acid nitric:

Owing to the nitric acid mass = $75.9 g$

Nitric acid molar weight $= 63\ \frac{g}{mol}$

If they put values above the formula, they receive:

$\text{moles in nitric acid} = \frac{75.9}{63}$

$=1.204 \ mol$

In the given chemical equation:

$3 NO_2 \ (g) + H_2O \ (l) \longroghtarrow 2 HNO_3 \ (aq) + NO\ (g)$

In this reaction, 2 mols of nitric acid are produced by 1 mole of water.

So, 1.204 moles of nitric acid will be produced:

$= \frac{1}{2} \times 1.204$

$=0.602\ \ \text{mol of water}.$

We are now using Equation 1 in determining the quantity of water:

Water moles $= 0.602\ mol$

Water weight molar $= 18.02 \ \frac{g}{mol}$

$\to 0.602 = \frac{\text{mass of mols}}{ 18.02}\\\\\to \text{mass of mols} = 0.602 \times 18.02\\\\$

$=10.84 \ g$

8 0

4 years ago

An experimenter begins with two equal balls of clay and then changes the shape of one the experiment is most likely testing for

zhenek [66]

I believe the answer is conservation of matter. I hope this helps!

7 0

4 years ago

We can change gas to a liquid by(Increasing, decreasing, removing) the temperature and (increasing, decreasing, removing ) the p

xz_007 [3.2K]

Decreasing

Increasing

Explanation:

We can change gas to liquid by decreasing the temperature and increasing the pressure.

Temperature is the degree of hotness or coldness of a body.
It is a function of how much heat it has absorbed or lost.
Heat causes the thermal energy of a system to increase and the particles becomes randomized.
Pressure is the force per unit area of particles.
If we decrease the temperature of gases, they have less kinetic energy and entropy reduces.
The will not be random.
Further increasing their pressure will bring them together and make them flow like liquid.
This phase change is often called condensation.

learn more:

Phase change brainly.com/question/1875234

#learnwithBrainly

8 0

4 years ago

What role does the oxidizing agent play in a redox reaction?

mr Goodwill [35]

Answer is "<span>the oxidizing agent receives electrons from the reducing agent</span><span>".

There are two types of reactants in redox reactions. One is oxidizing agent and other is reducing agent.

Oxidizing agent is a substance which helps to oxidize other substance by gaining electrons. This is also called as oxidizer. Due to the gaining electrons, oxidizing agents tend to be reduced.

Reducing agent or reducer helps to reduce other substance while loosening electrons. Hence, reducing agents tend to be oxidized.</span>

5 0

4 years ago

How does Gas Trapping bottles Monitor Volcanos?

Marta_Voda [28]

Answer: the pressure releases gas. The two most abundant gases are sulfur dioxide and carbon dioxide, and if levels of these gases increase,

Explanation:

4 0

3 years ago