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2 years ago

Blank + 3Fe, reaction arrow, Fe3O4+4H2

Chemistry

1 answer:

e-lub [12.9K]2 years ago

4 0

The complete reaction equation is $3Fe + 4H_2O -- > Fe_3O_4 + 4H_2$

<h3>What are single displacement reactions?</h3>

They are reactions in which one of the elements in a reactant is displaced by another element in the product.

In the reaction leading to the production of $Fe_3O_4$ , Fe displaced H atoms from $H_2O$ .

Thus, the equation of the reaction is as follows:

$3Fe + 4H_2O -- > Fe_3O_4 + 4H_2$

More on single displacement reactions can be found here: brainly.com/question/3172917

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separating a solid from a liquid by evaporating is called _____ a) filtration b) condensation c) solution d) distillation

tatiyna

D) Distillation is the process used to separate a solid from a liquid through <span>evaporating the liquid..</span>

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4 years ago

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The volume of a gas is 1.15 L at STP. At what temperature would the volume of the gas increase to 1.56 L, if the pressure is dec

denis23 [38]

A gas occupies 1.15 L at standard pressure and temperature and 1.56 L at 317 K and 650 mmHg, assuming ideal behavior.

<h3>What is an ideal gas?</h3>

An ideal gas is a gas whose behavior can be explained through ideal gas laws. One of them is the combined gas law.

A gas occupies 1.15 L (V₁) at STP (T₁ = 273,15 K and P₁ = 760 mmHg). We can calculate the temperature (T₂) at which V₂ = 1.56 L and P₂ = 650 mmHg, using the combined gas law.

$\frac{P_1 \times V_1}{T_1} = \frac{P_2 \times V_2}{T_2}\\T_2 = \frac{P_2 \times V_2 \times T_1}{P_1 \times V_1} = \frac{650mmHg \times 1.56 L \times 273.15K}{760mmHg \times 1.15 L} = 317 K$

A gas occupies 1.15 L at standard pressure and temperature and 1.56 L at 317 K and 650 mmHg, assuming ideal behavior.

Learn more about ideal gases here: brainly.com/question/15634266

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7 0

2 years ago

How many milliliters of an aqueous solution of 0.157 M magnesium nitrate is needed to obtain 17.4 grams of the salt?

Art [367]

Answer:

747mL of the 0.157mL are needed

Explanation:

To find the grams of salt we need to convert these grams to moles using molar mass of magnesium nitrate (148.3g/mol). Then, with the molar concentration we can convert the moles to liters and, as last, to milliliters, as follows:

<em>Moles Mg(NO₃)₂:</em>

17.4g * (1mol / 148.3g) = 0.117 moles of magnesium nitrate

<em>Volume:</em>

0.117 moles * (1L / 0.157moles) = 0.747L

= 747mL of the 0.157mL are needed

<em>In a 0.157M solution there are 0.157 moles per liter of solution</em>

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3 years ago

What is the correct name for the process in which the vapor turns back into a liquid

Ad libitum [116K]

Condensation<span>.

</span><span>Think of the water cycle in terms of raining/other forms of precipitation. Water condenses - or turns back into liquid from water vapor - to form into clouds.</span>

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4 years ago

Which of the following words means "the thing from which something else comes"?

swat32

Answer:

b. source

Explanation:

The source is where something comes from. i.e. The source of sunlight is the sun.

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4 years ago

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