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Ugo [173]
3 years ago
9

Hydrogen and oxygen combining to form water is an example of a physical change.

Chemistry
1 answer:
amid [387]3 years ago
7 0
In a physical change, the makeup of matter is changed. Evaporation occurs when liquid water changes into a gas. ... Combining hydrogen and oxygen to make water is a physical change.
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Of the molecules below, the bond in __________ is the most polar. hbr hi hcl hf
Black_prince [1.1K]
<span>There's a trend in electronegativity. The bottom left of periodic table is the lowest (0.7) and the upper right is the highest (4.0). The most polar is the greatest difference in electronegavity. hbr- 1~ , hi- 0.5~ ,hcl - 1.3~ , hf-1.8 so,hf is the answer</span>
7 0
3 years ago
Some compounds are described as binary compounds what does this mean
zubka84 [21]

Answer:

It means these compounds are only made up of two elements.

Explanation:

Binary compounds:

The compounds which are made up of the atoms of only two elements are called binary compounds.

For example:

The following compounds are binary:

HCl

H₂O

NH₃

HCl is binary because it is composed of only hydrogen and chlorine. Ammonia is also binary compound because it is made up of only two elements nitrogen and hydrogen.

water is also binary because it is also made up of only two elements hydrogen and oxygen.

While all polyatomic compounds are not binary. for example,

H₂SO₄

It is made up of hydrogen, sulfur and oxygen. There are three elements are present in this compound. So, it is not binary compound.

4 0
3 years ago
Which one of the following properties is NOT a chemical property? (5 points)
telo118 [61]

Answer:

a

Explanation:

Density is a physical property.

8 0
3 years ago
HELP AGAIN PLSS:
murzikaleks [220]
This is true


Because when water evaporates molecules break and separate into different atoms
4 0
2 years ago
A neutral atom always contains an equal number of
STALIN [3.7K]

Answer: protons and electrons

Explanation: In a neutral atom there are always equal numbers of protons and electrons.

8 0
2 years ago
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