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Misha Larkins [42]
3 years ago
15

Which sample is a pure substance?

Chemistry
2 answers:
jeka57 [31]3 years ago
7 0

The correct answer is: A. a test tube of zinc oxide

Sunny_sXe [5.5K]3 years ago
6 0
A test tube of zinc oxide
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An object becomes electrically charged when:
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An object becomes electrically charged when <em>electrons</em><em> </em><em>are</em><em> </em><em>transferred</em><em> </em><em>to</em><em> </em><em>it</em>

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An iron loses electrons. State the type of charge it will end up with
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Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet. In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic

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2 years ago
when two amino acid monomers are positioned so that the carboxyl group of one is adjacent to the amino group of the other, they
zalisa [80]

They can be joined through a Peptide bond

The amino acids serve as the foundation for proteins. Water is produced when the amino acids are linked to form a lengthy chain of acids via amino and carboxyl. The main protein is made up of these long chain amino acids.

When the carboxyl group of one molecule combines with the amino group of the other molecule, a molecule of water is released, and a peptide bond is created between the two molecules (H2O). This condensation event, sometimes referred to as a dehydration synthesis reaction, typically takes place between amino acids.

<h3>What is a Peptide bond ?</h3>

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Learn more about Peptide bond here:

brainly.com/question/11559138

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1 year ago
Which of the following diatomic gases has the shortest bond between its two atoms?
Sunny_sXe [5.5K]
The correct answer is D. N2
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What observations can you make about this group of people? Name one inference you can make from your observations.
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What group of people ay?

Maybe look at their differences in appearance: height, size, weight, skin color, clothing choice?

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3 years ago
Read 2 more answers
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