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tatuchka [14]
3 years ago
12

In one experiment, 0.893 mol of NO is mixed with 0.519 mol of O2. Determine which of the two reactants is the limiting reactant.

Calculate also the number of moles of NO2 produced.
Chemistry
2 answers:
Andrej [43]3 years ago
7 0

Answer:

bob

Explanation:

MakcuM [25]3 years ago
4 0

Answer:

NO is the limiting reactant.

0.893 moles of NO2 will be produced

Explanation:

Step 1: Data given

Number of moles NO = 0.893 moles

Number of moles O2 = 0.519 moles

Step 2: The balanced equation

2NO + O2 → 2NO2

Step 3: Calculate the limiting reactant

For 2 moles NO we need 1 mol O2 to produce 2 moles NO2

NO is the limiting reactant. It will completely be consumed. (0.893 moles)

O2 is in excess. There will react 0.893/2 = 0.4465 moles.

There will remain 0.519 - 0.4465 = 0.0725 moles O2

Step 4: Calculate moles NO2

For 2 moles NO we need 1 mol O2 to produce 2 moles NO2

For 0.893 moles NO we'll have 0.893 moles NO2

NO is the limiting reactant.

0.893 moles of NO2 will be produced

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Magnesium has three naturally occurring isotopes with masses of 23.99, 24.99, and 25.98 amu and natural abundances of 78.99%, 10
Elodia [21]

Answer:

24.309

Explanation:

Let A, B, and C represent the three isotopes.

For isotope A:

Mass number = 23.99

Abundance = 78.99%

For isotope B:

Mass number = 24.99

Abundance = 10.00%

For isotope C:

Mass number = 25.98

Abundance = 11.01%

Atomic mass of Mg =?

Atomic mass = [(Mass of AxA%)/100] + [(Mass of BxB%)/100] + [(Mass of CxC%)/100]

Atomic Mass = [(23.99x78.99)/100] + [(24.99x 10)/100] + [(25.98x11.01)/100]

Atomic number = 18.950 + 2.499 + 2.860

Atomic mass of Mg = 24.309

3 0
4 years ago
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Mariana [72]

Answer:

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5 0
3 years ago
ANSWER ASAP WILL GIFT BRANILIEST Which of the following happens to a molecule of an object when the object is cooled? A Its temp
Paladinen [302]

Answer:

It loses kinetic energy.

Explanation:

The definition of heat is molecules moving fast, so it cooling would mean they slow down.

6 0
3 years ago
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A solution of H 2 SO 4 ( aq ) with a molal concentration of 1.66 m has a density of 1.104 g / mL . What is the molar concentrati
uysha [10]

Answer:

1.58 M

Explanation:

H_2SO_4 is 1.66 m concentration.

Which means that 1.66 moles of  H_2SO_4 are present in 1 kg of the solvent, water.

Mass of water = 1 kg = 1000 g

Moles of H_2SO_4 = 1.66 moles

Molar mass of H_2SO_4 = 98.079 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

1.66\ mole= \frac{Mass}{98.079\ g/mol}

Mass_{H_2SO_4}= 162.81114\ g

Total mass = 1000 g + 162.81114 g = 1162.81114 g

Density = 1.104 g/mL

Volume of the solution = Mass / Density = 1162.81114 / 1.104 mL = 1053.27 mL = 1.05327 L

Considering:-

<u>Molarity = moles/ Volume of solution = 1.66 / 1.05327 M = 1.58 M </u>

4 0
3 years ago
You notice that every time you place butter on your stack of freshly made pancakes, the butter melts.
valentina_108 [34]

Answer:

Heat lost by the pancake = Heat gained by butter

Explanation:

Because energy is always conserved, this process involves the loss of energy by one substance which is gained by another.

The pancakes were freshly made, so they are hot; having the required energy to melt the butter placed on them. The butter absorbs heat from the pancakes which is equal to or greater than its melting point. Thus, the butter melts due to the heat absorbed.

Therefore,

Heat lost by the pancakes = Heat gained by butter

7 0
4 years ago
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