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Oxana [17]
3 years ago
8

A 200.0 ml beaker filled with oil has a mass of 293.2 g. The mass of just the beaker is 130.2

Chemistry
1 answer:
Lelu [443]3 years ago
5 0

Answer:p=m/v

p=(292.2-130.2)/200

p=0.8100g/ml

Explanation:

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What is the balanced equation for Fe+O2—->Fe3O4
DaniilM [7]

Answer:

3Fe2O2---> Fe3O4

Explanation:

You need to add three to the left side to make it equal to the one on the right, and add a 2 since you can't change the subscripts

3 0
3 years ago
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Differences between selenium tellurium and polonium
dsp73

Explanation:

Selenium and tellurium are rare elements, respectively, in order of crustal abundance. However, polonium, on account of its radioactive decay, is less abundant. The main source of selenium and tellurium is the anode slime deposited during the electrolytic refining of copper.

5 0
3 years ago
The green light emitted by a stoplight has a wavelength of 525 nm. What is the frequency of this photon? (c = 3.00 × 10⁸ m/s).
Reil [10]

The frequency of this photon is 5.94 x 10^{14} H_{Z}.

Solution:

The speed of light has a value of approximately <u>3.00×108 m/s</u>

The wavelength should have units of meters.

The frequency should have units of Hz or s−1. Hz is hertz or reciprocal seconds.

We know the value of the speed of light and we are given the wavelength. All we have to do is rearrange the equation to solve for the frequency:

<u>v = c/λ</u>

= 3.00×10^{8} m/s/505×10^{-9} m

= 5.94X10^{14}s-1

= <u>5.94X</u>10^{14}<u> Hz</u>

<u />

Frequency describes the number of waves passing through a particular location at a particular time. A class interval frequency is the number of observations that occur in a particular predefined interval. So, for example, if 20 of her ages 5-9 appear in the survey's data, the interval 5-9 has a frequency of 20. The class interval endpoints are the lowest and highest possible values ​​of the variable.

Learn more about The frequency here:- brainly.com/question/254161

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7 0
1 year ago
Biotechnology seems to cause much controversy. Why is this field more likely to draw attention from the public?
valkas [14]
Hello There!

The correct answer is B.

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Good Luck :) 

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7 0
4 years ago
Read 2 more answers
A rigid, well-insulated tank is filled initially with 5.0 kg of air at a pressure of 5 bars and a temperature of 500K. A leak de
Phoenix [80]

Explanation:

In an isotropic process, the equation is as follows.

        \frac{T_{2}}{T_{1}} = [\frac{P_{2}}{P_{1}}]^{\frac{k - 1}{k}}

         T_{2} = T_{1} \times [\frac{P_{2}}{P_{1}}]^{\frac{k - 1}{k}}

As the given data is as follows.

       T_{1} = 500 K,     m = 5 kg

       P_{1} = 5 bar,      P_{2} = 1 bar

Now, putting the given values into the above formula as follows.

           T_{2} = T_{1} \times [\frac{P_{2}}{P_{1}}]^{\frac{k - 1}{k}}

           T_{2} = 500 K \times [\frac{5 bar}{1 bar}]^{\frac{1.4 - 1}{1.4}}

                     = 315.7 K

As according to the ideal gas equation, PV = mRT

So, calculate the volume as follows.

                      V = \frac{mRT}{P}

                          = \frac{5 kg \times 287 J/kg \times 500 K}{5 \times 10^{5}}        (as 1 bar = 10^{5} Pa[/tex])

                          =  1.435 m^{3}

Now, we will calculate the value of m_{2} as follows.

                P_{2}V_{2} = m_{2}RT_{2}

               m_{2} = \frac{P_{2}V_{2}}{RT_{2}}

                       = \frac{1 \times 10^{5} \times 1.435 m^{3}}{315.7 K \times 287 J/kg}

                       = 1.58 kg

Thus, we can conclude that the amount of mass remaining in the tank is 1.58 kg and its temperature is 315.7 K.

7 0
3 years ago
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