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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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Identify the correct charge of each atomic particle
MA_775_DIABLO [31]

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

There are 3 sub-atomic particles present in an atom. They are: Electrons, protons and neutrons.

  1. <u>Electrons:</u> They are negatively charged particles and are present around the nucleus in the orbits.
  2. <u>Protons:</u> They are positively charged particles and are present inside the nucleus of an atom.
  3. <u>Neutrons:</u> They are neutral particles which means they do not carry any charge. They are present in the nucleus of an atom.

Hence, the correct answer is Option B.

7 0
3 years ago
Read 2 more answers
Rust is formed by the interaction of iron and oxygen. When rust formed on an iron nail with a mass of 100 g, the mass of the rus
DanielleElmas [232]

Answer: The correct option is A.

Explanation: Moles of Iron nail can be calculated by using the formula:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}       ...(1)

Given mass of iron nail = 100 g

Molar mass of iron = 56 g/mol

\text{Number of moles}=\frac{100g}{56g/mol}

Number of moles of iron nail = 1.79 moles

The chemical equation for the formation of rust if given by:

4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)

By Stoichiometry of the reaction,

4 moles of iron reacts with 3 moles of oxygen gas to produce 2 moles of rust.

So, 1.79 moles of iron will react with = \frac{3}{4}\times 1.79 = 1.3425 moles of oxygen gas.

For oxygen gas,

Molar mass = 32 g/mol

Mass of oxygen can be calculated by using equation 1, we get

1.3425mol=\frac{\text{Given mass}}{32g/mol}

Mass of oxygen gas = 43 grams

Hence, the correct option is a.

6 0
3 years ago
Two elements that become bonded together after a chemical reaction are known as a
Margaret [11]

Answer:compound

Explanation:

5 0
3 years ago
The reactants in a chemical equation have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms. In order to follow the conservat
Anon25 [30]

Answer:

The same amount of atoms (3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms).

Explanation:

According to the law of conservation of mass, when a chemical reaction takes place there is no synthesis or degradation of matter, that is, <em>matter can be neither created nor destroyed</em>. It can only be transformed.

Therefore, in a <u>chemical reaction the atoms are conserved</u>. That means that the elements that in definite proportions are forming a compound, will reorganize to form new compounds, and <u>the amount and type of atoms of the products will be the same as the reactants</u>.

In summary, if the reactants in a chemical equation have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms, the products of the chemical equation will have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms as well.

8 0
3 years ago
The mineral stibnite, antimony(III) sulfide, is treated with hydrochloric acid to give antimony(III) chloride and hydrogen sulfi
jeka94
The balanced chemical reaction is written as:

Sb2S3 + 6HCl = 6SbCl<span>3 + 3H2S

We are given the amount of </span><span>antimony(III) sulfide to be used in the reaction. This is amount will be used for the calculations. We do as follows:

2.85 g Sb2S3  ( 1 mol / </span><span>339.715 g ) ( 6 mol SbCl3 / 1 mol Sb2S3 ) (</span> 228.13 g / mol ) = 11.48 g SbCl3
5 0
3 years ago
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