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marysya [2.9K]
2 years ago
12

Multiple Choice Questions 1. Which of the following statement best describes an atom? A. Protons and electrons are grouped toget

her in a random pattern. B. Protons and electrons are grouped together in an alternating pattern C. A core of protons and neutrons surrounded by electrons. D. A core of electrons and neutrons surrounded by protons. 2. Table 5.10 shows the atomic mass of four stable isotopes of an element X. 119​

Chemistry
2 answers:
OverLord2011 [107]2 years ago
6 0
The answer is C. Here check out this diagram of an atom.

Arturiano [62]2 years ago
5 0

Answer:

C is Correct

Explanation:

Protons and Neutrons make up the Nucleus while Electrons surround the nucleus in circular orbits with continuous rotation.

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Answer : The number of iron atoms present in each red blood cell are, 1.077\times 10^9

Explanation :

First we have to calculate the moles of iron.

\text{Moles of iron}=\frac{\text{Mass of iron}}{\text{Molar mass of iron}}=\frac{2.90g}{55.85g/mole}=0.0519moles

Now we have to calculate the number of iron atoms.

As, 1 mole of iron contains 6.022\times 10^{23} number of iron atoms

So, 0.0519 mole of iron contains 0.0519\times 6.022\times 10^{23}=3.125\times 10^{22} number of iron atoms

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Number of iron atoms are present in each red blood cell = \frac{\text{Number of iron atoms}}{\text{Total number of red blood cells}}

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Therefore, the number of iron atoms present in each red blood cell are, 1.077\times 10^9

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Can someone help me with my science it’s super hard :(
Lunna [17]

Answer: here is a description of what they look like since I cannot see the diagram.

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