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mina [271]
3 years ago
6

A pure substance containing only one kind of ____________. an element is always uniform all the way through (homogeneous). an el

ement _____________ be separated into simpler materials (except during nuclear reactions). over 100 existing elements are listed and classified on the ____________________.
Chemistry
1 answer:
Anuta_ua [19.1K]3 years ago
8 0
1. A pure substance containing only one kind of atom.

When a substance has more than one kind of atoms, it would be called a compound. A pure substance can be made out of an element or compound as long as there is only one kind of them, but this question seems to ask about elements. 

2. An element is always uniform all the way through (homogeneous).
An element cannot be separated into simpler materials (except during nuclear reactions).

An element is the simplest form of material that can't be separated. The example would be oxygen(O2) or hydrogen(H2). An element doesn't mean it contains 1 atom because many of the stable structure made of 2 or more atoms. Normally, you cant separate O2 into two oxygen atoms.

<span>3. Over 100 existing elements are listed and classified on the periodic table.
The periodic table used to classify element and make it easier to understand. The classification based on the atomic number and the electron configuration of the elements.
The element in the same column could have similar traits so that they can be put into a group.</span>
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Distinguish between temperature and thermal energy
MissTica

Answer:

<u>The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecules and thermal energy is the total kinetic energy of all particles in a given substance.</u> Convection occurs when energy is transferred while the mass of a substance moves. The temperature is measured in Celsius, Kelvin, and Fahrenheit. The temperature does not depend on the quantity of the substance – it is related to the average kinetic energy of the particles. The thermal energy depends on the quantity of the substance – it is related to the total kinetic energy of the particles.

7 0
3 years ago
Assuming the following materials will not mix,show how the materials would "Stack up" in a graduated cylinder.
mihalych1998 [28]

<u>Answer:</u>

Density is mass per unit volume.

Its formula is  

Density = Mass / Volume

Its units can be kg/L  or kg/(dm^3) or g/mL or g/(cm^3)

Density of various substances are given. The more denser substance goes to the bottom of the graduated cylinder.  

Air on the top then comes  Wood followed by  Corn oil followed by  Ice and then  Water followed by  Glycerin then  Rubber then  Corn syrup and at last  Steel at the bottom  which will more denser than all the substances mentioned above.

The staking up of the substances is in the order mentioned below in the tabular column

4 0
3 years ago
A mixture of pure agcl and pure agbr is found to contain 60.94% ag by mass. what are the mass percents of cl and br in the mixtu
Annette [7]
First step is to calculate the mass of Ag in each compound separately:
From the periodic table: 
molar mass of Ag is 107.87 gm
molar mass of Cl is 35.45 gm
molar mass of Br is 79.9 gm
For AgCl, mass % of Ag = [107.87/143.32] x 100 = 75.26%
For AgBr, mass % of Ag = [107.87/187.77] x 100 = 57.45 %

Second step is to calculate the mass % of each compound in the mixture:
Assume mass % of AgCl is y and that of AgBr is (1-y) as the total percentage is 100% or 1
0.6094 = 0.7526 y + 0.5745 (1-y)
y = 0.8716
This means that the mixture is almost 87% AgCl and 13% AgBr
The mass % of chlorine and bromine together is (100%-60.94%) which is 39.06%
mass % of chlorine = (1-0.6094)(0.8716) x 100 = 34.044%
mass % of bromine = 39.04 - 34.044 = 5.056%
7 0
3 years ago
How many moles of sulfur will be needed to react with 5.00 grams of aluminum?
Pachacha [2.7K]

Answer:

9584738373848838e7e8e

6 0
2 years ago
You will need 384,000 gallons of liquid hydrogen for fuel. Convert to Liters.
Bingel [31]

Answer:

1455360 liters

Explanation:

If there are 3.79 liters in 1 gallon

Do 384,000 × 3.79

Which is 1455360

7 0
2 years ago
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