What is the symbol for temperature? m q T J

A mixture of uneven distribution and easy separation is called_____. homogeneous heterogeneous a solution a pure substance

dem82 [27]

The correct answer is heterogeneous.

6 0

3 years ago

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What is formed when 2 or more atoms are held together by covalent bonds?

Ksenya-84 [330]

The group of atoms held together by covalent bonds is called a molecule

7 0

3 years ago

Which bond has the greatest ionic character? A) H-Cl B) H-F c) H-O d) H-N

Len [333]

I really hope that this helps. H-F because the difference in electronegativity is the greatest, about 1.9 on the Pauling scale. The term means which bond has the greatest polarity and is thus most similar to an ionic bond, which involves the transfer of an electron (in opposition to covalent bonds, which share electrons). It is H-F because out of all the atoms here bonded with H, ie hydrogen, F is the most electronegative which means it can pull the bonded electrons to itself more than can Cl, O, and N. That means a stronger polarization of the electron cloud forming the bond with hydrogen and therefore a stronger ionic character.

5 0

3 years ago

State what would be observed when the following pairs of reagents are mixed in a test tube.

Mandarinka [93]

Answer:

(i). C6H2COOH and Na2CO3(aq)

observation: Bubbles of a colourless gas (carbon dioxide gas)

(ii) CH3CH2CH2OH and KMnO4 /H

observation: The orange solution turns green.

[This is because oxidation of propanol to propanoic acid occurs]

(iii) CH3CH2OH and CH3COOH + conc. H2SO4

observation: A sweet fruity smell is formed.

[This is because an ester, diethylether is formed]

(iv) CH3CH = CHCH3 and Br2 /H2O

observation: a brown solution is formed.

4 0

3 years ago

What is one important discovery that the curies made

tatiyna

The Curies discovered radium

6 0

3 years ago