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2 years ago

What is the mass percent of nitrogen in: 1. N2O 2. NO 3. NO2 4. N2O2

1 answer:

5 0

We’re going to use the mass percent formula shown below:

For the percent by mass N, we’re going to rewrite the equation as:

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Problem Details
Calculate the mass percent composition of nitrogen in each nitrogen-containing compound:

c. NO2

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While performing the assays for the LDH kinetics experiment, you will pipet 25ul of 250 ug/ml LDH into 975 ul of assay buffer (T

ArbitrLikvidat [17]

Answer:

6.25 μg/mL

Explanation:

When a dilution is made, the mass of the solute is conserved (Lavoiser's law), so the mass pipetted will be the mass in the assay. The mass is the concentration (C) multiplied by the volume (V). If the pipet solution is called 1, and the assay 2:

m1 = m2

C1*V1 = C2*V2

C1 = 250 μg/mL

V1 = 25 μL

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3 years ago

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meriva

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3 years ago

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12.A piece of magnesium is in the shape of a cylinder with a height of 5.62 cm

yaroslaw [1]

Answer:

Density, d = 1.779 g/cm³

Explanation:

The density of a material is given by its mass per unit volume.

Here, height of a piece of magnesium cylinder, h = 5.62 cm

Its diameter, d = 1.34 cm

Radius = 0.67 cm

Volume of he cylinder,

$V=\pi r^2 h\\\\\text{Putting the value of r and h, we get :}\\\\V=(\pi \times (0.67)^2\times 5.62)\ cm^3$

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So, the density of the sample is 1.779 g/cm³.

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3 years ago

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lana66690 [7]

Answer:

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Explanation:

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3 years ago

What is the molar mass of Ca(NO3)2?

Valentin [98]

The answer to the molar mass of Ca(NO3)2 is gonna be C. 164.1 g/mol

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