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kogti [31]
3 years ago
13

Glass or concrete has the better sound reflector?​

Chemistry
1 answer:
puteri [66]3 years ago
3 0

Answer:

Glass

Explanation:  it has its atoms tightly bonded with each other

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2 years ago
What is the mass in grams of 3x10 atoms of helium
Zepler [3.9K]

Answer:

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Explanation:

What is the total mass of $$3.01 x 10^23$$ atoms of helium gas?

✓ Well $$"Avogadro's number"$$ of helium atoms has a mass of $$4.0*g$$. Explanation: And $$"Avogadro's number"$$

3 0
3 years ago
Which of the following is the definition of an open physical system? A. a system that can be affected by the outside environment
sergey [27]

Answer:

A. a system that can be affected by the outside environment, by an exchange of matter or energy

5 0
3 years ago
Write the names and symbols for four elements in each of the following categories: (a) nonmetal, (b) metal, (c)metalloid.
Over [174]

Explanation:

Non-metals are the species that are electron deficient and they are able to accept one or more electrons from a donor atom in order to complete their octet.

For  example, carbon (C), nitrogen (N), chlorine, (Cl), phosphorus (P) etc are all non-metals.

Metals are the species that contain more number of electrons in their valence shell and in order to attain stability they easily lose an electron.

For example, sodium (Na), lithium (Li), Beryllium (Be), Magnesium (Mg) etc are all metals.

Metalloids are the species that show properties of both metals and non-metals.

For example, Boron (B), Antimony (Sb), Silicon (Si) and Germanium (Ge) etc are metalloids.

5 0
3 years ago
the diagram shows light striking a pane of glass . some of the light is reflected , and some of the light is transmitted. the le
GrogVix [38]
When light crosses any barrier 
3 0
3 years ago
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