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Alika [10]
3 years ago
7

What is a substance?

Chemistry
2 answers:
love history [14]3 years ago
4 0
The proper definition would be B. A mixture that can be separated.
hjlf3 years ago
3 0

Answer: The correct answer would be A: a uniform mixture that can’t be separated

Explanation: Google's definition is: "a particular kind of matter with uniform properties."

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Please Help!!<br><br> How does alpha decay change the nucleus of radioactive atom.
cluponka [151]

Answer:

When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number 2 less than the starting atom.

Explanation:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number 2 less than the starting atom.

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  + energy

5 0
3 years ago
What is the empirical formula for<br> C12H10O
rjkz [21]

Answer:

Hope this helps

molar mass: 170.21 g/mol

Explanation:

If it did plzz mark brainliest

7 0
3 years ago
How many grams of calcium phosphate are theoretically produced if we start with 552.2 grams of Ca(NO3)2 and 285.4 grams of Li3PO
Sedbober [7]
<span>molecular weight of Ca(NO3)2 --> 164 Ca=40 N=14 O=16 molecular weight of Li3PO4 --> 115.8 molecular weight of LiNO3 --> 68.9 Ca3(PO4)2 produced ---> 310.2 g/mol molecular weight Hence the answer would be 310.2 g/mol of calcium phosphate will be produced</span>
7 0
3 years ago
J.J. Thomson discovered the electron by noticing that: A. molecules with the same atoms exhibited the same chemical properties.
Slav-nsk [51]

J.J. Thomson discovered the electron by noticing that a beam of particles could be influenced by an electric or magnetic force and is denoted as option B.

<h3>What is an Electron?</h3>

This is referred to a subatomic particle which has a negative charge present and is involved in chemical reactions.

J.J. Thomson noticed that cathode rays were negatively charged due to deflection by magnetic and electric forces which signifies the presence of a negative particle.

Read more about J.J. Thomson here brainly.com/question/15361325

#SPJ1

5 0
2 years ago
What are the advantages to star topology?
Stella [2.4K]

Answer:A star topology is designed with each node (like workstations, printers, laptops, servers etc.) connected directly to a central device called as a network switch. Each workstation has a cable that goes from its network card to a network switch.

Most popular and widely used LAN technology Ethernet currently operates in Star Topology.

Explanation:

7 0
3 years ago
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