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ahrayia [7]
3 years ago
15

The atomic number for chlorine is 17 give the electron configuration for a neutral atom of chlorine

Chemistry
1 answer:
Firdavs [7]3 years ago
3 0
17 is the electron configuration for a neutral atom of chlorine.
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In an experiment, a student dissolves 56.3g of MgCl2 in 0.12kg of solvent. What is the molality of this solution? Show your work
Kazeer [188]

<u>Answer:</u> The molality of magnesium chloride is 4.93 m

<u>Explanation:</u>

To calculate the molality of solution, we use the equation:

Molality=\frac{m_{solute}}{M_{solute}\times W_{solvent}\text{ in kg}}

Where,

m_{solute} = Given mass of solute (MgCl_2) = 56.3 g

M_{solute} = Molar mass of solute (MgCl_2) = 95.2 g/mol

W_{solvent} = Mass of solvent = 0.12 kg

Putting values in above equation, we get:

\text{Molality of }MgCl_2=\frac{56.3}{95.2\times 0.12}\\\\\text{Molality of }MgCl_2=4.93m

Hence, the molality of magnesium chloride is 4.93 m

7 0
3 years ago
This rock should be classified as
garri49 [273]
B an extrusive igneous rock
4 0
3 years ago
Read 2 more answers
How can energy from the Sun be used to heat water? What
worty [1.4K]

Answer:

Water is heated as it travels through flat, glazed panels known as solar collectors, which are normally situated on the roof of the building. The heated water is then stored in an insulated storage tank.

4 0
3 years ago
When baking soda and vinegar are mixed together bubbles form and the vinegar and baking soda are changed into new chemicals. Is
seropon [69]

Answer:

Its a chemical change.

Explanation:

When baking soda and vinegar are mixed bubbles formed and new product is formed by both reactant. So its a chemical change because in a chemical change new substances are formed.

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) -------------------------------------> 2H 2O  (l)

4 0
3 years ago
If 35.50 cm3 of a NaOH solution are required for the complete neutralization of a 25.00cm3 sample of 0.200mol dm-3 H2SO4, what i
Morgarella [4.7K]
In this question, you are given the NaOH volume but asked for concentration. 
Don't forget that for every 1 mol of NaOH there will be 1 mol OH- ion, but for every 1 mol of H2SO4 there will be 2 mol of H- ion.
To neutralize you need the same amount of OH- and H+, so the equation should be:

OH-= H+
<span>35.50cm3 * x*1= 25cm3* 0.2mol/dm3 *2
</span>x= 10/35.5 mol/dm3= 0.2816/dm3
6 0
3 years ago
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