In the Reaction: 2 Na + Cl₂ → 2 NaCl

question 102

Multiple Choice

In the reaction: 2 Na + Cl₂ → 2 NaCl, if 46.0 g of sodium react, what is the first step necessary in determining how much sodium chloride can form?

• A)Computing the number of atoms of sodium
• B)Computing the number of moles of chlorine
• C)Computing the number of grams of chlorine
• D)Computing the number of moles of sodium

Identify the components associated with tear production and eye movement.

Understand the role of the iris and pupil in controlling light entry into the eye.

Recognize the symptoms and appropriate responses to common eye problems.

Identify key structures of the ear and their functions in hearing and balance.

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Definitions:

Isotope

Variants of an element that contain the same number of protons but different numbers of neutrons in their nuclei.

Neutrons

Subatomic particles, found in the nucleus of an atom, that have no electrical charge and a mass slightly larger than that of protons.

Element

A substance that cannot be broken down into simpler substances by chemical means and is made up of atoms all with the same number of protons.

Isotope

Variants of a particular chemical element which differ in neutron number, and consequently in mass, but not in electrical charge.