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2 years ago

On brainly, how can I stop chemistry from popping up on my brainly home page. I only need this for math and thats how I want it.

Chemistry

2 answers:

Sati [7]2 years ago

8 0

<h3>Hello there i hope you are having a great day your question : On brainly, how can I stop chemistry from popping up on my brainly home page. I only need this for math and that how I want it?</h3><h3>pictures are shown below hope that helps you ❤ </h3>

dimulka [17.4K]2 years ago

4 0

Answer:

Go to the top left and you will see ur subject

Explanation:

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Estimate the molar mass of a gas that effuses at 1.6 times the effusion rate of CO2

Vlada [557]

To estimate the molar mass of the gas, we use Graham's law of effusion. This relates the rates of effusion of gases with their molar mass. We calculate as follows:

r1/r2 = √(m2/m1)

where r1 would be the effusion rate of the gas and r2 is for CO2, M1 is the molar mass of the gas and M2 would be the molar mass of CO2 (44.01 g/mol)

r1 = 1.6r2

1.6 = √(44.01 / m1)
m1 = 17.19 g/mol

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2 years ago

The quantity 0.202 g has _____________________________ significant<br> figures.

andreyandreev [35.5K]

0.202g has 3 sigfigs

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2 years ago

The mass defect for the formation of lithium-6 is 0.0343 g/mol. The binding energy for lithium-6 nuclei is ________ kJ/mol. Ente

Sholpan [36]

<u>Answer:</u> The binding energy for lithium-6 nuclei is 3.09 E+11

<u>Explanation:</u>

Binding energy is defined as the energy which holds the nucleus together. It is basically the product of mass defect and the square of the speed of light.

This energy is calculated by using Einstein's equation, which is:

$E=\Delta mc^2$

where,

E = Binding energy of the atom

$Delta m$ = Mass defect = 0.0343g/mol = $0.0343\times 10^{-3}kg/mol$ (Conversion factor: $1kg=10^3g$ )

c = speed of light = $3\times 10^8m/s$

Putting values in above equation, we get:

$E=0.0343\times 10^{-3}kg/mol\times (3\times 10^8m/s)^2$

$E=3.09\times 10^{14}J/mol=3.09\times 10^{11}kJ/mol$ (Conversion factor: $1kJ=10^3J$ )

Hence, the binding energy for lithium-6 nuclei is 3.09 E+11

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2 years ago

A series of experiments investigating the reaction of (CH3)3CCl with H2O to create (CH3)3OH produces a plot of Ln[(CH3)3CCl] vs.

Helga [31]

Explanation:

There will occur a straight line for the curve of Ln[(CH_{3})_{3}CCl] Vs. time. Since, it is a first order reaction therefore, the formula of its half-life will be as follows.

Half-life = $\frac{ln 2}{k}$

or, k = $\frac{ln 2}{t_{\frac{1}{2}}}$

= $\frac{ln 2}{220} sec^{-1}$

So, rate of the reaction will be as follows.

Rate = $[(CH_{3})_{3}CCl]^{1}$

= $\frac{ln 2}{220} sec^{-1} \times 0.15 M$

= 0.000473 $Ms^{-1}$

= $4.73 \times 10^{-4} Ms^{-1}$

Thus, we can conclude that the instantaneous rate of given reaction is $4.73 \times 10^{-4} Ms^{-1}$ .

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2 years ago

Correctly order the production and transport of sperm through the male reproductive system. Semen is released from the penis, Sp

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1) Sperm is produced in the testes. 2) sperm leaves the testes through the seamen duct, 3) in the seaman duct fluids from the glands are added to the Sperm, 4) seaman is released form the penis.

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2 years ago

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