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Aleksandr-060686 [28]
3 years ago
6

Human diseases such as tetanus, syphilis, typhoid, and cholera are caused by small cells that lack a nucleus. These cells can en

ter the human body and cause disease. Which common name is associated with these cells?
A) antibody
B) bacteria
C) toxin
D) virus
Chemistry
2 answers:
olga nikolaevna [1]3 years ago
7 0

Answer: B. Bacteria

Explanation:

blondinia [14]3 years ago
6 0
The answer would B.

Bacteria do not have a nucleus and are prokaryotes (single-celled organisms that don't have a distinct nucleus with a membrane)
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A 23.6 ml of slat water has a mass of 26.47 grams. calculate its density.
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The density is 1.12161 g/ml

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A 133.8-gram sample of bronze was 10.3% tin by mass. Determine the total mass of tin in the sample.
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How does density relate to the cold and warm air masses?
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3 0
2 years ago
Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope
morpeh [17]

<u>Answer:</u>

<u>For a:</u> The isotopic representation of iodine is _{53}^{131}\textrm{I}

<u>For b:</u> The isotopic representation of cesium is _{55}^{137}\textrm{Cs}

<u>For c:</u> The isotopic representation of strontium is _{38}^{52}\textrm{Sr}

<u>Explanation:</u>

The isotopic representation of an atom is: _Z^A\textrm{X}

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

  • <u>For a:</u>

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is _{53}^{131}\textrm{I}

  • <u>For b:</u>

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is _{55}^{137}\textrm{Cs}

  • <u>For c:</u>

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is _{38}^{52}\textrm{Sr}

3 0
3 years ago
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