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dsp73
3 years ago
13

1. Compare and contrast substances and mixtures. Givetwo examples of each.​

Chemistry
1 answer:
NemiM [27]3 years ago
3 0

A substance is a sample of a specific type of matter, such as:

-water

-dirt

-

A mixture is a combination of two or more contrasting substances, some mixtures fully combine to create a new substance and some mixtures simply create combinations such as:

-A mixture of dirt + water creates mud which is an example of a new substance

-A mixture of cheese + ham + bread creates a sandwich which is an example of a combination

Hope this helps :)

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Which molecule below has hydrogen bonding? Which molecule below has hydrogen bonding? H2 CH3CH2OH HCl CH4 all of the above
QveST [7]

Answer:

CH_3CH_2OH

Explanation:

Hydrogen bonding:-

Hydrogen bonding is a special type of the dipole-dipole interaction and it occurs between hydrogen atom that is bonded to highly electronegative atom which is either fluorine, oxygen or nitrogen atom.

Partially positive end of the hydrogen atom is attracted to partially negative end of these atoms which is present in another molecule. It is strong force of attraction between the molecules.

Thus, hydrogen must be linked to electronegative atom which is oxygen, fluorine and nitrogen which is in CH_3CH_2OH and thus, it will shown hydrogen bonding.

3 0
3 years ago
Which of the above electron dot diagrams is wrong and why?
Elodia [21]

Answer:

Oxygen, it's supposed to have six valenge electrons.

Explanation:

Count the dots on the oxygen atom, you'll see seven, but there's supposed to be six.

5 0
3 years ago
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Stella [2.4K]
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7 0
3 years ago
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When we say an object is hot, we are describing its velocity thermal energy wavelength chemical energy?
boyakko [2]
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3 0
4 years ago
During a 4 hour trip, a boat sailed 70 km in 2 h. Then the boat did not move for 1 hour and traveled 26 km in the last hour. Wha
Lubov Fominskaja [6]

Answer:

32km/hr

Explanation:

The question asks to calculate the average speed for a boat.

Mathematically, the average speed is the total distance divided by the total time

Let’s get the total distance traveled:

That would be 70km + 26km = 96km

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The average speed is thus 96/3 = 32km/hr

7 0
3 years ago
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