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Masja [62]
3 years ago
12

Please help fast please!!!

Chemistry
1 answer:
Natali [406]3 years ago
5 0

Answer:

welcome to the picture

Explanation:

ok let get it ok finish

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What mass of ni has as many atoms as there are n atoms in 63.0 g of no2?
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Answer : The mass of Ni is, 80.346 g

Solution :

First we have to calculate the number of moles.

\text{Moles of }NO_2=\frac{\text{Mass of }NO_2}{\text{Molar mass of }NO_2}=\frac{63g}{46g/mole}=1.369moles

Now we have to calculate the number of atoms of NO_2

As 1 moles NO_2 contains 6.022\times 10^{23} number of molecules

So, 1.369 moles NO_2 contains 1.369\times 6.022\times 10^{23} number of molecules

One NO_2 molecule has one nitrogen atom then 1.369\times 6.022\times 10^{23} number of molecules of NO_2 will contain 1.369\times 6.022\times 10^{23} number of nitrogen atoms

As per question number of Ni atoms is equal to the number of nitrogen atoms

Number of Ni atoms=1.369\times 6.022\times 10^{23} atoms

Number of moles = \frac{1.369\times 6.022\times 10^{23}}{6.022\times 10^{23}}=1.369moles

Mass of Nickel = Moles\times \text{Molecular mass}}

Molecular mass of Nickel = 58.69 g/mol

Mass of nickel = 1.369mol\times 58.69g/mol=80.346grams

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2 years ago
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Answer the questions about the characteristics of the elements in group 1 (the alkali metals). What happens when the elements in
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Answer:

See explanation

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The elements in group form univalent positive ions and element in group 17 form univalent negative ions. Hence, when a group 1 element reacts with a group 17 element, a compound of the sort MX is formed. Hence, when a group 1 element reacts with bromine, a salt is formed with the general formula MBr.

Elements of group 1 are highly electro positive metals. They react with water to form the metal hydroxide and release hydrogen gas. Hence, when group 1 elements react with water, hydrogen gas is released.

A group 1 element forms a univalent positive ion while a group 16 element forms a divalent negative ion. Hence, when a groups 1 element reacts with oxygen, the compound formed must have the general formula M2O.

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According to the law of conservation of matter, atoms cannot be created or destroyed during a chemical reaction. what do you thi
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