Mixture of water and petrol is an example of Homogeneous mixture Select one : O True O False​

It's True

Explanation:

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homogeneous mixture has the same uniform appearance and composition throughout.  

A heterogeneous mixture consists of visibly different substances or phases. A salad with lettuce, cheese, seeds, tomatoes, broccoli, and other vegetables is an example of a heterogeneous mixture.

NaCl(aq) solution and milk is a homogeneous mixture has uniform composition throughout.

Sand and water make a heterogeneous mixture as sand is insoluble in water and the mixture has localized regions with different properties.

Pure iron is not at all a mixture. It is a  pure form of an element and can not be classified as homogeneous or heterogeneous mixture.

Hence, option E represents a false statement regarding mixtures.

Explanation:

a. they are both space stations

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number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.