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3 years ago

Which substance combines with iron in the presence of water to form rust?

Chemistry

2 answers:

Aleksandr [31]3 years ago

6 0

Answer:

b. oxygen

Explanation:

ololo11 [35]3 years ago

5 0

The answer would be B: Oxygen!

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Naddik [55]

Answer:1. height(in.)

2. arm span (in.)

3. (30,27)

Explanation: i just answered it and it was right:)

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3 years ago

Solid iron (III) oxide reacts with hydrogen gas to form iron and water. How many grams of iron are produced when 440.23 grams of

Nookie1986 [14]

When 440.23 grams of iron(III) oxide are reacted with hydrogen gas, the amount of iron produced will be 307.66 grams

<h3>Stoichiometric calculation</h3>

From the equation of the reaction:

$Fe_2O_3 + 3H_2 --- > 2Fe + 3H_2O$

The mole ratio of iron(III) oxide to produced iron is 1:2.

Mole of 440.23 iron(III) oxide = 440.23/159.69 = 2.76 moles

Equivalent mole of produced iron = 2.76 x 2 = 5.52 moles

Mass of 5.52 moles of iron = 5.52 x 55.8 = 307.66 grams

More on stoichiometric calculations can be found here; brainly.com/question/27287858

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4 0

2 years ago

Help me with this question please like right now

denis23 [38]

Using the gas laws, the volume of nitrogen produced is 6.6 L.

<h3>What is the product of a reaction?</h3>

We know that the product of a reaction is obtained from the balanced reaction equation. The reactants combine together to yield the products hence we have; N2 + 3H2 ----> 2NH3

We know that 1 mole of hydrogen occupies 22.4 L

x moles of hydrogen occupies 25500 L

x = 1 mole * 25500 L/ 22.4 L

x = 1138.4 moles

If 3 mole of hydrogen reacts with 1 mole of nitrogen

1138.4 moles reacts with 1138.4 moles * 1 mole/ 3 moles = 379.5 moles

Mass of nitrogen = 379.5 moles * 28 g/mol = 10626 g

Now 3 moles of hydrogen produces 44.8 L of NH3

1138.4 moles produces 1138.4 moles * 44.8 L/ 3 moles = 17000 L

Now;

P1V1/T1 = P2V2/T2

P1V1T2 = P2V2T1

V2 = P1V1T2/P2T1

V2 = 1 * 17000 * 848/5.5 * 273

V2 =9601 L

2) 2NH4NNO3(s) ---> 4H2O(g) + 2N2(g) + O2(g)

Number of moles = 12g/ 80 g/mol = 0.15 moles

Now;

2 moles of NH4NNO3 produced 2 moles of nitrogen hence 0.15 moles of N2 was produced.

1 mole of N2 occupies 22.4 L

0.15 moles of N2 occupies 0.15 moles * 22.4 L/1 mole = 3.36 L

P1 = 760 torr

V1 = 3.36 L

T1 = 273 K

P2 = 745 torr

T2 = 527 degrees or 800 K

V2 = ?

V2 = P1V1T2/P2T1

V2 = 760 * 3.36 * 527/745 * 273

V2 = 6.6 L

Learn more about gas laws:brainly.com/question/12669509

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3 0

2 years ago

SOMEONE PLEASE ANSWER

Dvinal [7]

Answer:You can view more details on each measurement unit: molecular weight of BaCl2 or grams This compound is also known as Barium Chloride. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles BaCl2, or 208.233 grams.

Explanation:

3 0

4 years ago

(I NEED THIS ANSWERED ASAP!! WORTH 20 PTS)

Schach [20]

1) Independent variable is the physical properties
2) Dependent variable is the pH of the solution.

You can change the physical properties (independent variable) to get a different pH value(dependent variable)

3 0

3 years ago

Read 2 more answers