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3 years ago

Question 1:

Chemistry

1 answer:

dusya [7]3 years ago

5 0

Answer:

(a) 1°; (b) SN2; (c) see below

Explanation:

(a) The alkyl halide is 1°.

(b) The nucleophilic substitution will be SN2.

(c) Mechanism

See below

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What science was developed later which was found to support darwins theory

Delicious77 [7]

The closest related would be Biology but this, in principle, existed prior to Darwin.

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4 years ago

Calculate the number of grams contained in each of the following number of moles. Report your answer with the appropriate number

Debora [2.8K]

Answers:

a. 131.85 grams

b. 134.69 grams

To calculate the number of grams in the number of moles given for each compound, consider the formula:

Moles = No. of grams / molar mass

Therefore, to find the gram it will become:

No. of grams = moles x molar mass

a. 0.410 mol of NaCl (sodium chloride)

Molar mass of NaCl = (286.14 + 35.45) = 321.59

No. of grams = moles x molar mass

No. of grams = 0.410 x 321.59 = 131.85 grams

b. 4.80 mol of C2H4 (ethylene)

Molar mass of C2H4 = (12.01 x 2) + (1.01 x 4) = 28.06

No. of grams = moles x molar mass

No. of grams = 4.80 x 28.06 = 134.69 grams

3 0

3 years ago

Read 2 more answers

Biểu thức định luật Raoul là?

Dennis_Churaev [7]

Answer: Định luật Raoult là một định luật hóa học vật lý, với ý nghĩa trong nhiệt động lực học. Được thành lập bởi nhà hóa học người Pháp François-Marie Raoult vào năm 1887, nó nói rằng áp suất một phần của mỗi thành phần của một hỗn hợp chất lỏng lý tưởng bằng với áp suất hơi của thành phần tinh khiết nhân với phần nốt ruồi của nó trong hỗn hợp. Kết quả là, việc giảm áp suất hơi tương đối của dung dịch pha loãng của chất tan không lây bằng với phần nốt ruồi của chất tan trong dung dịch.

Explanation: hope this helps :)

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3 years ago

Visible light, which has a wavelength of between 380 nm and 760 nm, is usually

AlexFokin [52]

B. not fully absorbed by the atmosphere.

Explanation:

Visible light, which has a wavelength of between 380nm and 760nm is usually not fully absorbed by the atmosphere.

The earth's atmosphere is transparent to visible light emanating from the sun.

When visible light is radiated out from the sun, on reaching the atmospheric cover of the earth, it goes through without restraints.

Little to no interaction occurs between the atmospheric cover of earth and visible light.
This is why the surface is bright and receives sunlight.
Other more energetic radiations interacts with atmosphere.
Some of them gets cut off and some partially penetrate through.

learn more:

Light waves brainly.com/question/8145673

#learnwithBrainly

4 0

3 years ago

How much energy will a photon with a frequency of 6.8 x 104 Hz emit?

Advocard [28]

Answer:

Energy emitted by photon = 45.06 × 10−32 J

Explanation:

Energy of photon is given by E = hf

where

h is the Planck's constant whose value is 6.626×10−34J⋅s

f is the frequency of photon

________________________________________

given that

f = 6.8 x 104 Hz

1 HZ = 1 s^-1

E = 6.626×10−34J⋅s * 6.8 x 10^4 Hz

E = 45.06 × 10−32 J

Thus,

Energy emitted by photon is 45.06 × 10−32 J

8 0

4 years ago