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Elena-2011 [213]
3 years ago
12

The mass number of an atom is found by adding

Chemistry
1 answer:
pentagon [3]3 years ago
8 0
Adding protons and neutrons
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I need help...
Aneli [31]

Answer:

1. Density of the rectangular prism is  <u>20 g/cm3</u>

2. A material's ability to dissolve : <u>Soubility</u>

3. <u>Intensive property</u> : A physical property that is independent of sample size.

Explanation:

Volume of Prism is calculated by :

volume = L\times W\times H

Length = 3 cm

Width = 2 cm

Height = 1 cm

volume = 3\times 2\times 1

V = 6 cm3

mass = 120 g

Density = \frac{mass}{Volume}

Density = \frac{120}{6}

Density = 20 g/cm3

2.

<u>Solubility :</u>

  • It is the chemical property of the substance.
  • It shows the ability of the solute to dissolve in the solvent at a given temperature.

3.

<u>Intensive Properties:</u>

  • These are bulk properties(Do not depend upon the amount of matter present)
  • They are independent of sample size.
  • Example : boiling point,melting point,temperature,refractive index

7 0
3 years ago
How many protons,neutrons and electrons are present in an atom of hafnium,hf,with a mass number of 178?
AleksAgata [21]
178 of each species
178 protons
178 neutrons
And 178 electrons
7 0
3 years ago
Read 2 more answers
Why do scientists use stirbars in the laboratory?
andrew11 [14]

Answer:

A stir bar consists of a magnetic bar used to agitate a liquid mixture or solution

Explanation:

7 0
2 years ago
In Boston elevation 20 feet, your mass is 75 kg. On top of Mt. Everestt (elevation 29,029 feet) you mass would be
Tpy6a [65]

Answer:

75 kg or 75,000 g

Explanation:

Mass is a measurement that describes the amount of matter within an object. This is a constant measurement that does not change regardless of the object's location.

As such, a person's mass would be the same at both elevations.

**Their weight, however, may change.

** 1 kg = 1,000 g

7 0
2 years ago
Which equivalence factor should you use to convert from 3.48 x 1018 atoms of magnesium (Mg) to moles of magnesium?
attashe74 [19]
You should divide by 6.02*10^23.
5 0
3 years ago
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