If you start with 5.5 grams of sodium fluoride, how many grams of magnesium fluoride will be produced in the reaction #Mg + 2NaF -> MgF_2 + 2Na#?

Answer 1

There will be 4.1 g of #"MgF"_2# produced.

5.5 grams of sodium fluoride in mass

#"moles" = "mass"/"molar mass"#
#"moles" = "5.5 g"/"(22.99 + 18.998) g/mole"#
#"moles" = 5.5/41.998 "moles"#
#"moles" = "0.13096 moles of NaF"#
For every 2 moles of #"NaF"#, there is 1 mole of #"MgF"_2#.
Using this knowledge, we can determine the amount of moles of #"MgF"_2#.
#"0.13096 moles of NaF"/2 = "moles of MgF"_2#
#"moles of MgF"_2 = "0.06548 moles"#

This will now be converted to grams.

#"moles" = "mass"/"molar mass"#
#"0.06548 moles" = "mass"/"(24.305+2(18.998)) g/mole"#
#0.06548 = "mass"/"62.301 g"#
#"mass of MgF"_2 = "4.1 grams"#
Therefore, there will be 4.1 grams of #"MgF"_2# produced.
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Answer 2

To find out how many grams of magnesium fluoride (MgF_2) will be produced from 5.5 grams of sodium fluoride (NaF), we'll first need to calculate the molar masses of NaF and MgF_2 using the atomic masses of the elements involved (Na = 22.99 g/mol, F = 19.00 g/mol, Mg = 24.31 g/mol).

  • Molar mass of NaF: 22.99 g/mol (Na) + 19.00 g/mol (F) = 41.99 g/mol
  • Molar mass of MgF_2: 24.31 g/mol (Mg) + 2(19.00 g/mol (F)) = 62.31 g/mol

Given 5.5 grams of NaF:

  1. First, calculate the moles of NaF: [ \text{Moles of NaF} = \frac{5.5 , \text{grams}}{41.99 , \text{g/mol}} ]

[ \text{Moles of NaF} = 0.131 , \text{moles} ]

Since the reaction shows that 2 moles of NaF react with Mg to produce 1 mole of MgF_2, the moles of MgF_2 produced will be half the moles of NaF.

  1. Calculate the moles of MgF_2 produced: [ \text{Moles of MgF}_2 = 0.131 / 2 = 0.0655 , \text{moles} ]

  2. Finally, calculate the mass of MgF_2 produced: [ \text{Mass of MgF}_2 = 0.0655 , \text{moles} \times 62.31 , \text{g/mol} ]

[ \text{Mass of MgF}_2 = 4.08 , \text{grams} ]

Therefore, 4.08 grams of magnesium fluoride will be produced.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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