Isotopes are the atoms of the same element with same atomic number but different mass number isotopes of same element have same chemical properties due to same number of electrons atomic number of an atom is the number of electrons protons in it and mass number is the sum of protons
Answer:Flouride it creates enamel.
Explanation:
enamel (that's the tooth's hard outer surface) more resistant to acids produced by the bacteria living on the teeth and gums.
Mass of Magnesium bromide : 5.76 g
<h3>Further explanation</h3>
Complete question
<em>What mass of Magnesium bromide is formed when 1.00 g of magnesium reacts with 5.00 g of bromine?</em>
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Reaction
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mol Mg

mol Br₂

Limiting reactants : Br₂(smaller)
mol MgBr₂ = mol Br₂=0.0313
mass MgBr₂ :

Answer: The new volume is 95.45 mL.
Explanation:
Given:
= 45.0 mL,
= 0.98 atm
= 2.1 atm,
= ?
According to Boyle's law, at constant temperature the pressure of a gas is inversely proportional to its volume.
Therefore, formula used to calculate the new volume is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the new volume is 95.45 mL.