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elena-s [515]
3 years ago
6

Calculate the mass of 3.4 moles of nitrous acid (HNO2). Explain the process or show your work by including all values used to de

termine the answer.
Chemistry
1 answer:
Zina [86]3 years ago
8 0

Answer:

Mass = 159.8 g

Explanation:

Given data:

Mass of HNO₂ = ?

Moles of nitrous acid = 3.4 mol

Solution:

Formula:

Number of moles = mass / molar mass

We will rearrange this formula.

Mass = number of moles × molar mass

Molar mass of nitrous acid =  47 g/ mol

Mass = 3.4 mol × 47 g/ mol

Mass = 159.8 g

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Scientific notation is defined as writing a number between 0 to 10 multiplied by a power of 10
3.5 x 10² x 8.0 x 10⁻²
when we solve the equation 
answer - 28 
to write in scientific notation the decimal point should come after the first digit from the right. to bring the decimal point from after digit 8 to after digit 2, we have to move one decimal place to the left. then we get 2.8, to get the value as 28 we have to multiply 2.8 by 10
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3 years ago
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Answer:

The solution's new volume is 1.68 L

Explanation:

Dilution is the procedure to prepare a less concentrated solution from a more concentrated one, and simply consists of adding more solvent. So, in a dilution the amount of solute does not vary, but the volume of the solvent varies.

In summary, a dilution is a lower concentration solution than the original.

The way to do the calculations in a dilution is through the expression:

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In this case, being:

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Replacing:

7 M*0.60 L= 2.5 M* Vf

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Vf=\frac{7 M*0.60 L}{2.5 M}

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3 years ago
The elements least likely to form bonds are found in which group? 15, 16, 17, 18
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Answer:

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Explanation:

Edgenuity

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