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3 years ago

D.

Chemistry

2 answers:

luda_lava [24]3 years ago

4 0

Answer : B. Salt

Explanation
I really hope this right

lbvjy [14]3 years ago

3 0

salt

Explanation:

I hope this answer is right

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A gas has a volume of 300 mL in a rigid container at 50oC and 1.75 atm. What will be its pressure at 100K?

eduard

Answer:

Its pressure will be 0.54 atm at 100 K.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

Gay-Lussac's law can be expressed mathematically as the quotient between pressure and temperature equal to a constant:

$\frac{P}{T} =k$

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

$\frac{P1}{T1} =\frac{P2}{T2}$

In this case:

P1= 1.75 atm
T1= 50 °C= 323 K (being 0 C=273 K)
P2= ?
T2= 100 K

Replacing:

$\frac{1.75 atm}{323 K} =\frac{P2}{100 K}$

Solving:

$P2= 100 k*\frac{1.75 atm}{323 K}$

P2= 0.54 atm

<u><em>Its pressure will be 0.54 atm at 100 K.</em></u>

8 0

3 years ago

A particular forest is 10,000 acres. Determine its size in hectares. (1 hectare = 2.47

igor_vitrenko [27]

Taking into account the change of units, a particular forest is 4,048.58 hectares.

<h3>Definition of rule of three</h3>

The rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

If the relationship between the magnitudes is direct, the direct rule of three must be applied using the following formula, where a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So: x= (c×b)÷ a

The direct rule of three is the rule applied in this case where there is a change of units.

<h3>Size in hectareas</h3>

To perform in this case the conversion of units, you must first know that 1 hectare = 2.47 acres.

So, the rule of three can be used as follow: if 2.47 acres is 1 hectare, 10,000 acres equals how many hectares?

2.47 acres ⇒ 1 hectare

10,000 acres ⇒ x

So: x= (10,000 acres ×1 hectare)÷ 2.47 acres

Solving:

<u><em>x= 4,048.58 hetares</em></u>

In summary, a particular forest is 4,048.58 hectares.

Learn more with this example:

brainly.com/question/12482948

#SPJ1

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2 years ago

2 Zn + 2HNO2-> 2 ZN(NO2)2 + H2

Aliun [14]

It 6.8 so there you go And this answer is Long because I just need points lol

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3 years ago

Predict if rates of evaporation are higher than rates of condensation over a warm body of water. Explain your answer.

Studentka2010 [4]

Answer:

When water temperature increases (right), the rate of evaporation also increases. In turn, the amount of water vapor in the "air space" above the water increases. ... But, with increased evaporation, more water molecules exist in the air above the water, which in turn increases the condensation rate.

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3 years ago

What characteristics are shared by all alkali metals and alkaline earth metals?

serious [3.7K]

Answer:

All alkali and alkaline earth metals dissolves in water to form alkaline solutions.

Explanation:

The alkali metals are found in group one of the periodic table while the alkaline earth metals are found in group 2. These two groups of elements are quite reactive and they react very well with air and water. All the elements in the two groups react with water to give rise to alkaline solutions; solutions whose pH range from 8 to 14.

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4 years ago