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3 years ago

4Fe+302→2Fe2o3. how many moles of oxygen are needed if we have 8 moles of fe

Chemistry

1 answer:

kap26 [50]3 years ago

8 0

Answer:

For 8 moles of iron 6 moles of oxygen are required.

Explanation:

Given data:

Number of moles of oxygen needed = ?

Number of moles of Fe = 8 mol

Solution:

Chemical equation:

4Fe + 3O₂ → 2Fe₂O₃

Now we will compare the moles of iron and oxygen from balance chemical equation.

Fe : O₂

4 : 3

8 : 3/4×8 = 6

So for 8 moles of iron 6 moles of oxygen are required.

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In what orbital would to valence electrons of strontium be found? a.) 5s b.) 4s c.) none d.) 5p

KonstantinChe [14]

Answer:

The correct answer is 5s

Explanation:

Strontium atomic number = 38

Electronic configuration is $$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{6} 5s^{2}$

As $5s$ orbital is valence orbital in strontium, the outer electrons exists in that orbital only.

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3 years ago

Given:1 inch = 2.54 cm (exact)1 pound = 454 g1 Liter = 1.0b quarts1 foot = 12 inches1 galion = 4 quarts1 pound = 16 ouncesCalcul

svet-max [94.6K]

We have to convert 0.18 km into feet

First, we need to know the conversions:

1 inch = 2.54 cm (exact)

1 pound = 454 g

1 Liter = 1.0b quarts

1 feet = 12 inches

1 galion = 4 quarts

1 pound = 16 ounces

0.18 km x (1 feet/12 inches) x (1 inch/2.54cm) x (1000 m/1 km) x (100 cm/1 m) = 590 ft

Answer: 590 ft (2 significant figures)

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1 year ago

What Size container do you need to hold 0.0459 mol of N2 gas at stp

Allushta [10]

Hello!

You need to calculate the volume of the container. To calculate the volume of this amount of N₂ gas we need to make the assumption that N₂ behaves like an ideal gas.

1 mole of an ideal gas under Standard Temperature and Pressure occupies 22,4 L so the calculations are as follows:

$0,0459 mol N_2* \frac{22,4 L}{1 mol N_2}= 1,028 L$

So, the volume of the container should be 1,028 L or more.

Have a nice day!

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3 years ago

Ammonia (NH3 (g), Delta.Hf = –45.9 kJ/mol ) reacts with oxygen to produce nitrogen and water (H2 O(g), Delta.Hf = –241.8 kJ/mol)

Bogdan [553]

The enthalpy of the reaction according to given information is –1,267.2 kJ

<h3>What is Enthalpy of the reaction ?</h3>

The Heat of Reaction (also known and Enthalpy of Reaction) is the change in the enthalpy of a chemical reaction that occurs at a constant pressure.

It is a thermodynamic unit of measurement useful for calculating the amount of energy per mole either released or produced in a reaction.

Therefore, The enthalpy of the reaction according to given information is –1,267.2 kJ

Learn more about Enthalpy here ;

brainly.com/question/16720480

#SPJ1

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2 years ago

Choose the correct order of electron structures from largest to smallest.

Yakvenalex [24]

A. <span>principal energy level, sublevel, orbital, electron</span>

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4 years ago

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