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timofeeve [1]
3 years ago
5

3. Matter with a composition that is always the same is a(n) substance mixture compound

Chemistry
1 answer:
Andre45 [30]3 years ago
7 0

Answer:

substance

Explanation:

A pure substance is a form of matter that has a constant composition (meaning it's the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc

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Why don't I need prefixes to designate the number of each type of element when naming ionic compounds?
scoray [572]

We use prefixes in ionic compounds Don't use numeric prefixes like mono, di, tri, etc. when naming ionic compounds - they are used only to denote covalent molecular compounds.

5 0
2 years ago
A thin sheet of iridium metal that is 3.12 cm by 5.21 cm has a mass of 87.2 g and a thickness of 2.360 mm. What is the density o
never [62]

Answer:

Therefore the density of the sheet of iridium is 22.73 g/cm³.

Explanation:

Given, the dimension of the sheet is 3.12 cm by 5.21 cm.

Mass: The mass of an object can't change with respect to position.

The S.I unit of mass is Kg.

Weight of an object is product of mass of the object and the gravity of that place.

Density: The density of an object is the ratio of mass of the object and volume of the object.

Density =\frac{mass}{volume}

            =\frac{Kg}{m^3}                 [S.I unit of mass= Kg and S.I unit of m³]

Therefore the S.I unit of density = Kg/m³

Therefore the C.G.S unit of density=g/cm³

The area of the sheet is = length × breadth

                                        =(3.12×5.21) cm²

                                       =16.2552 cm²

Again given that the thickness of the sheet  is 2.360 mm =0.2360 cm

Therefore the volume of the sheet is =(16.2552 cm²×0.2360 cm)

                                                             =3.8362272 cm³

Given that the mass of the sheet of iridium is 87.2 g.

Density =\frac{87.2 g}{3.8362272 cm^3}

             =22.73 g/cm³

Therefore the density of the sheet of iridium is 22.73 g/cm³.

5 0
3 years ago
In a(n) ____, the particles form a regular, repeating pattern.
Effectus [21]
For the answer to the question above, asking what is t<span>he particles form a regular, repeating pattern.

The answer to this question is the last one among the given choices which is </span><span>D.) crystalline solid

I hope my answer helped you. Feel free to ask more questions. Have a nice day!</span>
4 0
3 years ago
4. The density of lead is 11.3 g/cm, Determine the mass of 4.25 cm of lead, (18.09)
VARVARA [1.3K]

Answer:

48.03grams

Explanation:

Density of a substance is calculated as follows:

Density (g/cm³) = mass (g) / volume (cm³)

Based on the information given in this particular question:

Density of lead (Pb) = 11.3 g/cm³

Volume of lead (Pb) = 4.25 cm³

Density = m/V

11.3 = mass/4.25

Mass = 48.025

= 48.03grams.

6 0
3 years ago
Suppose that a bar magnet is suspended by a string a few millimeters above another bar magnet. If the north pole of the bottom m
OLga [1]
The pole varies in position on a yearly basis due to secular variation (or drift in Earth's magnetic field). Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
7 0
3 years ago
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