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Scrat [10]
3 years ago
14

In the science lab, Sika combines two substances and determines that a chemical change has taken place. What

Chemistry
1 answer:
Lerok [7]3 years ago
4 0

Answer:

Evidence of chemical change is color change, smell,new matter created, gas created or heat or light being created.

Explanation:

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PLEASE HELP- CHEMISTRY QUIZ
jonny [76]

Answer:

•Li2S is at a low melting point

•NCL3 is a covalent bond

Explanation:

Just some notes to help you:))

Covalent Bonds: A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons

5 0
3 years ago
Which formula contains two nonmetals
VLD [36.1K]

Answer:

Nonmetal + Nonmetal —> covalent compound (usually)

Explanation:

Covalent compounds are formed when two nonmetals react with each other.

7 0
3 years ago
if you could place a piece of solid silver into a container of liquid silver, would it float or sink? Explain your answer
olga55 [171]
Liquid silver is less dense than solid silver, so the solid silver would sink.
5 0
3 years ago
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When hydrogen gas is bubbled into 2-butyne, the product is
kolbaska11 [484]

Answer:

On treatement of 2 -with hydrogen gas and lindlar catalyst, the major product obtained is cis-2butene.

3 0
2 years ago
Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. What type of matter is it? A. soluti
drek231 [11]
The answer is <span>B. element.

An element is composed of only one kind of atom and cannot be separated into simpler substances. Oxygen (O) is the element.
A compound is a substance composed </span><span>of two or more <em>different </em>atoms chemically bonded to one another, for example, water (H</span>₂<span>O) consists of 2 atoms of hydrogen (H) and 1 atom of oxygen (O), so it is the compound.
A mixture consists of two or more substances that are not chemically combined. Solutions and colloids are mixtures.</span>
8 0
3 years ago
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