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Anna71 [15]
3 years ago
7

Definition: A compound composed of two elements that share valence electrons

Chemistry
1 answer:
Evgen [1.6K]3 years ago
3 0

Answer:

Explanation:

Binary compound

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What is the measurement 111.009 mm rounded off to four significant digits? a. 111 mm b. 111.0 mm c. 111.01 mm d. 110 mm Please s
faltersainse [42]
Four significant figures would be B. Because 0's before the decimal are not important, but 0's after the decimal are.
3 0
3 years ago
Is it possible to find density and volume of a substance with just the mass?
tensa zangetsu [6.8K]

Even though an atom may be smaller than another atom, it might have more mass. The mass of atoms, their size, and how they are arranged determine the density of a substance. Density equals the mass of the object divided by its volume; D = m/v. Objects with the same mass but different volume have different densities.

7 0
3 years ago
Please help, once again. Can't seem to get this...
sveta [45]
In one H₂O molecule, there are two hydrogen atoms along with one oxygen atom. So for every 1 oxygen atom (of which there are 2 of in an oxygen gas molecule) there needs to be 2 hydrogen atoms per oxygen( which in the equation of 2H2 +O2–> 2H2, that 2 H2 is broken down into 4 hydrogen atoms which means 2 hydrogen atoms have to bond to 1 oxygen atom and with 4 hydrogen atoms, there will be 2 atoms of oxygen which creates 2 molecules of water.

So to solve the question,
10.5g/2=5.25g of oxygen required to fully react with hydrogen to make water
4 0
3 years ago
When diagramming an atom, the electron shells ____________ the nucleus must be filled first?
Nonamiya [84]

Concept: According to the basic concept of the electronic configuration of the element, the electron can be filled first in those shell which has least energy or (n +l) value. Here, n is the principal quantum number on shell and l is the azimuthal quantum number.

Since, the first shell has least value of energy in any atom. So, it should be filled first.

Hence, the correct statement can be written as;

When diagramming an atom, the electron shells _nearest to _ the nucleus must be filled first.

4 0
3 years ago
Which of the following is a sign a chemical reaction has occurred? A liquid changes to a solid when cooled. A liquid forms bubbl
3241004551 [841]

The best answer is, “Two clear liquids combine and turn cloudy.”

When water freezes form a liquid to a solid. That’s a physical change.

When water boils, it forms bubbles. That’s a physical change.

When you mix ethanol and water, they form a clear solution. That’s a physical change.

3 0
3 years ago
Read 2 more answers
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