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frez [133]
3 years ago
11

An atom of iron has the atomic number 26 and a mass number of 56. how many protons plus neutrons are in the nucleus?

Chemistry
2 answers:
mojhsa [17]3 years ago
4 0
<span>iron has 26 protons and 30 neutrons are in the nucleus</span>
sergeinik [125]3 years ago
3 0
Hello there,

The answer will be 56 because 30 plus 26 equals 56.

Hope I helped :)
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Which of these elements have the same number of valance electrons
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Both carbon and lead belong to Group IV elements, and thus they have the same number of valence electrons. 
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What is the name of the ionic compund formed from lithium and bromine?
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Lithium Bromine (LiBr) is formed from them....
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18.
Leno4ka [110]

Answer:

It helps the body remove heat through sweating.

Explanation:

When the weather is hot, the body tries to keep cool by sweating. The high specific heat capacity means that the body doesn't have to lose much water to stay cool.

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One mole of a metallic oxide reacts with one mole of hydrogen to produce two moles of the pure metal
kenny6666 [7]

Answer:

Lithium oxide, Li₂O.  

Explanation:

Hello!  

In this case, according to the given amounts, it is possible to write down the chemical reaction as shown below:

M_2O+H_2\rightarrow 2M+H_2O  

Which means that the metallic oxide has the following formula: M₂O. Next, we can set up the following proportional factors according to the chemical reaction:

5.00gM_2O*\frac{1molM_2O}{(2*X+16)gM_2O}*\frac{2molM}{1molM_2O}*\frac{XgM}{1molM}=2.32gM  

Thus, we perform the operations in order to obtain:

\frac{10X}{(2X+16)}=2.32  

So we solve for x as shown below:

10X=2.32(2X+16)\\\\10X=4.64X+37.12\\\\X=\frac{37.12}{10-4.64}\\\\X= 6.93g/mol  

Whose molar mass corresponds to lithium, and therefore, the metallic oxide is lithium oxide, Li₂O.  

Best regards!

8 0
3 years ago
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