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Zepler [3.9K]
3 years ago
9

Look at 3 or 4 other atoms using the simulation. Do any of them ahve a whole number for atomic mass?

Chemistry
1 answer:
In-s [12.5K]3 years ago
7 0

Answer:

There are three isotopes of silicons. They have masses numbers of 28, 29 and 30. The average amount of silicons is 28.086alum

Explanation:

I learned this in class three days ago so I hope this is helpful i'm in high school  ask me for help when ever you want Iĺl help you

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Which of the following prefixes would be best to use when measuring the distance from your home to the store?
Shalnov [3]
I would say the most correct answer is Kilo, as in kilometers. The store would certainly not be milli, or millimeters away from you, would it now? :)

Hope this helps!
4 0
3 years ago
Mario performed an experiment to investigate how certain substances dissolve in water. He poured the substances in separate beak
geniusboy [140]

Answer: Solubility

Explanation:

Solubility is the ability or property  of a solute which can be  a solid, liquid, or gaseous chemical substance to dissolve in a solvent (solid, liquid or gas) and form a solution. The factors that affect how soluble a substance is depends on the solvent ,temperature and pressure.

Here, Mario trying to dissolve certain substances (solutes) in water (the  solvent shows he is trying to find out the solubility of the substances which can be insoluble, sparingly soluble or very soluble.

8 0
3 years ago
Read 2 more answers
The atomic number of manganese is 25; its mass number is 55.
Anuta_ua [19.1K]

Answer:

c) 30

Explanation:

In an atom , the relation between the subatomic particles of the atom are given as follows -

For a neutral atom ,

Atomic number = number of protons = number of electrons ,

Mass number = number of protons + number of neutrons,

Hence , from the given information of the question,

Atomic number of Manganese = 25 ,

mass number of Manganese = 55 ,

Now, to calculate the number of neutrons , the above relation can be used -

Mass number = number of protons + number of neutrons,

Rearranging ,

number of neutrons = Mass number - number of protons

substituting the respective values ,

number of neutrons = 55 - 25 = 30 .

4 0
3 years ago
TIME REMAINING
melamori03 [73]

Answer:

'*:*'

Explanation:

I know this looks weird, but

'= electron

*:* equals the nucleus, so 2 protons and 2 neutrons

and then '=electron

7 0
3 years ago
Which of the following changes can be reversed by changing the temperature: (a) dew condensing on a leaf; (b) an egg turning har
oksano4ka [1.4K]

Answer:

(a) dew condensing on a leaf

(c) ice cream melting

Explanation:

The process which can be reversed by changing the temperature , i.e. , by increasing or decreasing the temperature , is called the <u>reversible process</u> .

From the question ,  

  • dew condensing on a leaf is a reversible process ,  

As the water on the leaf can be changed to gaseous state by increasing the temperature .  

The process of condensation and evaporation are reversible of each other .

  • Ice cream melting

The melted ice cream can be solidified again by reducing its temperature , hence , it is a reversible process .

  • an egg turning hard when boiled and the batter cooking on a hot griddle

They both are irreversible process , and by changing the temperature , we can not get back the original substance .

3 0
3 years ago
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