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3 years ago

What is the amount of energy carried by a photon that has a frequency of 3.76 x 1014 Hz?

2 answers:

6 0

C = λν E = hν. C = 3.00 x 108 m/s h = 6.626 x 10- 34 J-s (or J/Hz). What is the wavelength of a wave having a frequency of 3.76 x 1014 s-1?

VARVARA [1.3K]3 years ago

4 0

(3.0x108)/(3.76x1014) =7.98x10-7 m

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horsena [70]

<u>Answer:</u> The mass of sulfuric acid present in 60 mL of solution is 34.1 grams

<u>Explanation:</u>

We are given:

44 % (m/m) solution of sulfuric acid. This means that 44 grams of sulfuric acid is present in 100 grams of solution.

To calculate volume of a substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of solution = 1.343 g/mL

Mass of solution = 100 g

Putting values in above equation, we get:

$1.343g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{100g}{1.343g/mL}=77.46mL$

To calculate the mass of sulfuric acid present in 60 mL of solution, we use unitary method:

In 77.46 mL of solution, mass of sulfuric acid present is 44 g

So, in 60 mL of solution, mass of sulfuric acid present will be = $\frac{44g}{77.46mL}\times 60mL=34.1g$

Hence, the mass of sulfuric acid present in 60 mL of solution is 34.1 grams

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