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Galina-37 [17]
3 years ago
10

(PLEASE ANSWER ASAP) Which choice is the smallest in mass?

Chemistry
2 answers:
morpeh [17]3 years ago
7 0

Answer: The answer is B-- Electron

Explanation:

soldier1979 [14.2K]3 years ago
4 0

Answer:electron

Explanation:

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If you were about 10 kilometers above earth, what would the pressure approximately be?
Sliva [168]

Answer:

About 25 kPa  

Explanation:

Pressure decreases with height above sea level.

The calculation is rather complicated, so I will refer to the figure below.  

It shows that the pressure at 10 km is about 25 kPa.

7 0
3 years ago
Which process represent one chemical change and one physical change
Step2247 [10]
It’s number 3 : decomposition and melting
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3 years ago
The thermostat in a refrigerator filled with cans of soft drinks malfunctions and the temperature of the refrigerator drops belo
butalik [34]

Answer:

B.

Explanation:

Water expands on freezing and there is more water in the diet drinks than in the other drinks.

5 0
3 years ago
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A a black metal measures 2 cm x 3 cm x 2.5 cm if it's much is 67.5 grams calculate its density​
liraira [26]

Answer:

d=4.5  g/cm³

Explanation:

v=l x w x h

v=2 x 3 x 2.5

v=15 cm³

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3 0
3 years ago
Study the following reaction carefully. What classification should this reaction have? 4Al + 3O 2 2Al 2 O 3
nikitadnepr [17]

The reaction is a synthesis…

4Al + 3O_2 \longrightarrow 2Al_2O_3\\

… because <em>two substances are combining to make one other substance</em>.

4\stackrel{\hbox{0}}{\hbox{Al}} + 3\stackrel{\hbox{0}}{\hbox{O}}_2 \longrightarrow 2\stackrel{\hbox{+3}}{\hbox{Al}}_2\stackrel{\hbox{-2}}{\hbox{O}}_3\\

It is also a <em>reduction-oxidation reaction</em> because the <em>oxidation number of Al increases</em> from 0 to +3 and the <em>oxidation number of O</em> decreases from 0 to -2.

6 0
3 years ago
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