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2 years ago

Spontaneous generation is a mistaken idea because living things:

Chemistry

2 answers:

Oduvanchick [21]2 years ago

7 0

B. Are produced only by living things

Kryger [21]2 years ago

7 0

Answer:

Are produced only by living things.

Explanation:

Theory of spontaneous generation explains that living organisms are produced from the inorganic matter. For example: rats are originated from the wheat.

The theory of sponatneous genereation is not valid and considered as a mistaken idea. The living organisms are produed from the other living organisms or produced from the organic mattter only.

Thus, the correct answer is option (B).

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777 Joules of energy are applied to 25.0 grams of each of the following materials, which

4vir4ik [10]

Answer:

I think copper

Explanation:

Material IACS % Conductivity

Silver 105

Copper 100

Gold 70

Aluminum 61

Nickel 22

Zinc 27

Brass 28

Iron 17

Tin 15

Phosphor Bronze 15

Lead 7

Nickel Aluminum Bronze 7

Steel 3 to 15

the table might help- your indian brother

3 0

2 years ago

Will give lots of points if answered correctly. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes t

Liono4ka [1.6K]

Answer: The value of $K_{b}$ for chloroform is $3.62^{o}C/m$ when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.

Explanation:

Given: Moles of solute = 0.793 mol

Mass of solvent = 0.758

$\Delta T_{b} = 3.80^{o}C$

As molality is the number of moles of solute present in kg of solvent. Hence, molality of given solution is calculated as follows.

$Molality = \frac{no. of moles}{mass of solvent (in kg)}\\= \frac{0.793 mol}{0.758 kg}\\= 1.05 m$

Now, the values of $K_b$ is calculated as follows.

$\Delta T_{b} = i\times K_{b} \times m$

where,

i = Van't Hoff factor = 1 (for chloroform)

m = molality

$K_{b}$ = molal boiling point elevation constant

Substitute the values into above formula as follows.

$\Delta T_{b} = i\times K_{b} \times m\\3.80^{o}C = 1 \times K_{b} \times 1.05 m\\K_{b} = 3.62^{o}C/m$

Thus, we can conclude that the value of $K_{b}$ for chloroform is $3.62^{o}C/m$ when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.

7 0

2 years ago

Express the pressure 545 mm Hg in kilopascals.

Arlecino [84]

545mm Hg in Kilopascals is 72.6607

I hope this helps you. Good luck stay safe, healthy and, happy!<3

6 0

2 years ago

Which is a diatomic molecule? A. He B. O2 C. NaCl D. CuF2

katrin2010 [14]

O2 is the right answer

4 0

3 years ago

Read 2 more answers

write a balanced chemical equation for each single replacement reaction that takes place in aqueous solution. write no reaction

Illusion [34]

The question is incomplete, here is the complete question:

Write a balanced chemical equation for each single replacement reaction that takes place in aqueous solution. write no reaction if a reaction does not occur

1.) Zn + PbCl₂

2.) Cu + Fe(NO₃)₂

Answer:

For 1: The reaction does occur.

For 2: The reaction does not occur.

Explanation:

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

$A+BC\rightarrow AC+B$