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Mariulka [41]
4 years ago
14

Please help me with chemistry!

Chemistry
1 answer:
Helga [31]4 years ago
5 0

Br₂ (l) + 2 NaI (s) → 2 NaBr (s) + I₂ (s)

Explanation:

Reacting bromide (Br₂) with sodium iodine (NaI) will produce sodium bromide (NaBr) and iodine (I₂).

To balance the equation the number of atoms of each element entering the  reaction have to be equal to the number of atoms of each element leaving the reaction, in order to conserve the mass.

Br₂ (l) + 2 NaI (s) → 2 NaBr (s) + I₂ (s)

where:

l - liquid

s - solid

This is a single replacement reaction because an element in a compound is replaced by another element. Generally a single replacement reaction is represented as: A + BC → AC + B

Learn more about:

types of chemical reactions

brainly.com/question/10105284

balancing chemical equations

brainly.com/question/13908054

#learnwithBrainly

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Read the given expression.
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The variable X is the effective nuclear charge, and it remains constant down a group.

Discussion:

The effective nuclear charge is referred to as the actual amount of positive (nuclear) charge experienced by an electron in a polyelectronic atom.

The effective nuclear charge experienced by an electron is otherwise called the core charge.

It is mathematically evaluated as the difference in the atomic number and the core electrons. and since elements in the same group have equal number of Valence electrons, the effective nuclear charge is constant down the group.

Read more on effective nuclear charge:

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3 years ago
Electrons are attracted to the nucleus of the atom by_______ force​
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Answer:

Electrons are attracted to the nucleus of the atom by electrostatic force.

4 0
3 years ago
The most common oxygen is an atom with 8 protons and 8 neutrons what is the mass of this isotope ​
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3 years ago
How many grams of cuno3 will be required to make 1.00 l of 0.420 m solution?
7nadin3 [17]

Answer:

The answer to your question is:  52.92 g of CuNO₃

Explanation:

Data

grams of CuNO₃ = ?

volume = 1 l

concentration = 0.420 M

MW of  CuNO₃ = 64 + 14 + 3(16) = 126 g

Formula

Molarity = moles / volume

moles = Molarity x volume

moles = 0.420 x 1

moles = 0.420 moles

                                    1 mol of CuNO₃  -------------------  126 g of CuNO₃

                                  0.420 moles CuNO₃ -------------    x

                                    x = (0.420 x 126) / 1

                                    x = 52.92 g of CuNO₃

3 0
3 years ago
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