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2 years ago

What is the molar concentration of

Chemistry

1 answer:

Leto [7]2 years ago

3 0

Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

(without rounding: 1.418531175 M)

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Two moles of magnesium (Mg) and five moles of oxygen (O2) are placed in a

I am Lyosha [343]

First off, the chemical equation needs to be balanced. Since there are 2 oxygen atoms in the reactants, we must produce 2 moles of MgO, which means we need 2 moles of Mg, giving:
2Mg + O2 --> 2MgO
Therefore for a stoichiometric reaction where no reactant is left over, the number of moles of magnesium must be double that of oxygen. However, as seen, the molar ratio of magnesium to oxygen is 2:5, meaning oxygen is in large excess, and Magnesium is the limiting reactant. Therefore the answer is A.

8 0

3 years ago

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The formula for Na2 O

Rudiy27

Answer:

Na₂O is the formula for the ionic compound "sodium oxide".

It has 2 sodium atoms and 1 oxygen atom.

The number of atoms for an element are written as a subscript after the element. "1" subscripts are not written.

The names of the elements are found on the periodic table.

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3 years ago

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Realizar una oracion empleando los verbos en infinitivo que estan anteriormente (acompañar, bailar, dormir, convivir, proteger)

gladu [14]

Answer:

(Léase explicación)

Explanation:

1) El presidente va a acompañar a la ciudadanía en tan histórica jornada.

2) No me gusta bailar en solitario.

3) Me gusta dormir después de degustar un chocolate caliente con malvavisco.

4) El Coronavirus ha demostrado que algunas familias no saben convivir entre sí.

5) Voy a proteger al débil frente a los embates del crimen organizado.

7 0

4 years ago

which equation is setup correctly to determine the volume of a 1.5 mol sample of oxygen gas at 22 degrees Celsius and 100 kPa

rjkz [21]

Hello!

We have the following data:

v (volume) = ? (in L)
n (number of mols) = 1,5 mol
T (temperature) = 22 ºC
First let's convert the temperature on the Kelvin scale, let's see:
TK = TºC + 273,15
TK = 22 + 273,15
TK = 295,15

P (pressure) = 100 kPa → P = 100000 Pa → P ≈ 0,987 atm
R (gas constant) = 0,082 atm.L / mol.K

<span>We apply the data above to the Clapeyron equation (gas equation), let's see:

</span> $P*V = n*R*T$

$0,987*V = 1,5*0,082*295,15$

$0,987V = 36,30345$

$V = \dfrac{36,30345}{0,987}$

$\boxed{\boxed{V \approx 36,78\:L}} \end{array}}\qquad\checkmark$

I hope this helps. =)

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3 years ago

A covalent bond is likely to be polar when ________. one of the atoms sharing electrons is more electronegative than the other a

nekit [7.7K]

Answer:

one of the atoms sharing electrons is more electronegative than the other atom

Explanation:

3 0

4 years ago