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3 years ago

SCIENCE QUESTION plz helpz

Chemistry

1 answer:

kvasek [131]3 years ago

5 0

Molecule: two or more different or same atoms chemically bonded together. A mixture contains two or more substances, that are not chemically bonded together. A compound is a pure substance, while a mixture is not.

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How do you think a country's GDP affects its citizen ability to consume

Aliun [14]

<span>The larger the GDP the better the overall economy of the country. It means more produced equals more for domestic consumption and hopefully an excess for export. It is essentially the production of wealth that will increase the standard of living for every citizen. Remember, GDP is the measure of the value of the gross domestic production of goods and services.</span>

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3 years ago

The pressure inside of a sealed tube if you raise the temperature go ______..

Helen [10]

Answer:

The pressure will increase due ot expnasion of gasses in a closed sealed tube tube .

Explanation:

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3 years ago

Read 2 more answers

In 1901, Thomas Edison invented the nickel-iron battery. The follwing reaction takes place in the battery.

lys-0071 [83]

Answer: The number of moles of $Fe(OH)_2$ produced are, 3.60 moles.

Explanation :

First we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

$Fe(s)+2NiO(OH)(s)+2H_2O(l)\rightarrow Fe(OH)_2(s)+2Ni(OH)_2(aq)$

From the balanced reaction we conclude that

As, 1 mole of $Fe$ react with 2 mole of $NiO(OH)$

So, 3.60 moles of $Fe$ react with $3.60\times 2=7.2$ moles of $NiO(OH)$

From this we conclude that, $NiO(OH)$ is an excess reagent because the given moles are greater than the required moles and $Fe$ is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of $Fe(OH)_2$

From the reaction, we conclude that

As, 1 mole of $Fe$ react to give 1 mole of $Fe(OH)_2$

So, 3.60 mole of $Fe$ react to give 3.60 mole of $Fe(OH)_2$

Therefore, the number of moles of $Fe(OH)_2$ produced are, 3.60 moles.

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3 years ago

A weather balloon is inflated to a volume of 27.9L at a pressure of 732mmHg and a temperature of 30.1?C. The balloon rises in th

masya89 [10]

Answer:

45.4 L

Explanation:

Using Ideal gas equation for same mole of gas as

$\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}$

Given ,

V₁ = 27.9 L

V₂ = ?

P₁ = 732 mmHg

P₂ = 385 mmHg

T₁ = 30.1 ºC

T₂ = -13.6 ºC

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (30.1 + 273.15) K = 303.25 K

T₂ = (-13.6 + 273.15) K = 259.55 K

Using above equation as:

$\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}$

$\frac{{732}\times {27.9}}{303.25}=\frac{{385}\times {V_2}}{259.55}$

$\frac{385V_2}{259.55}=\frac{20422.8}{303.25}$

$148225V_2=6729708.26018$

Solving for V₂ , we get:

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3 years ago

How would it have been if particles of matter had no space?

iragen [17]

Answer:

Matter is made of small particles of atoms or molecules. ... The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

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3 years ago