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egoroff_w [7]
3 years ago
6

How many valence electrons does “Na” (atomic number 11) have?

Chemistry
1 answer:
BigorU [14]3 years ago
8 0

Answer:

Sodium has 11 valence electrons

Explanation:

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Determine the number of representative particles in each of the following:
tia_tia [17]

Answer:

(a) 0.294 mol silver = 1.770 * 10^{23}  

(b) 8.98 * 10-3 mol sodium chloride - 5.407 *10^{23}  

(c) 23.3 mol carbon dioxide  = 1.403 * 10^{25}

(d) 0.310 mol nitrogen (N2) = 1.866 * 10^{23}

Explanation:

In one mole there are 6.022 * 10^{23} atoms/molecules

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(b) 8.98 * 10-3 mol sodium chloride - 5.407 *10^{23}  

(c) 23.3 mol carbon dioxide  = 23.3 * 6.022 * 10^{23} = 1.403 * 10^{25}

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If the molar mass of x (hco3) is 162 g/mol, determine the relative atomic mass of x.
Anastasy [175]

The relative atomic mass of x is 101 u.

Molar mass is calculated by adding the atomic mass of all the elements in a compound.

Molar mass of x(HCO₃) =162 g/mol

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Atomic mass of O = 16 g/mol

Therefore, molar mass of x(HCO₃) will be

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2. The molecules gains energy,which enable them to move faster and collide with the right energy for a reaction to take place.

3. The average kinetic motion of molecules in a solution can be measured by measuring the temperature. Temperature is a measure of the average kinetic energy of molecules in a solution.

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4 years ago
What are substances composed of 2 or more different atoms that are united by bonds of any type?
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A molecule consists of two or more atoms united by a bond


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