Chemistry, 05.10.2019 16:20, devinluck100

Tin reacts with fluorine to form two different compounds, a and b. compound a contains 38.5 g of tin for each 12.3 g of fluorine. compound b contains 56.5 g of tin for each 36.2 g of fluorine. what is the lowest whole-number mass ratio of tin that combines with a given mass of fluorine?

Answers: 2

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Answers

Tin to Fluorine mass ratios:
1) For compound A:
38.5/12.3
= 3.13
2) For compound B:
56.5/36.2
= 1.56
The lowest whole number mass ratio is 2. It cannot be 1 because it is less than that required for compound B.

answered: hannah396

In compound A, the mass ratio of Tin to Fluorine is 1 : 2

In compound B, the mass ratio of Tin to Fluorine is 1 : 4

Explanation: For the reaction of Tin and Fluorine, the reaction follows:

$Sn+F_2\rightarrow A+B$

To calculate the mass ratio, we simply find the mole ratio and for that we need to find the moles of Tin and fluorine respectively for each compound and then divide it by the lowest number of moles.

Molar mass Tin = 118.71g/mol

Molar mass Fluorine = 19g/mol

Formula to calculate the moles is:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$

For Compound A:

Given mass of Tin = 38.5 g

Moles of Tin = $\frac{38.5g}{118.71g/mol}=0.324mol$

Given mass of Fluorine = 12.3 g

Moles of Fluorine = $\frac{12.3g}{19g/mol}=0.647mol$

Mole ratio of Tin is = $\frac{0.324}{0.324}=1$

Mole ratio of Fluorine = $\frac{0.647}{0.324}=1.99\approx 2$

Mass ratio of Tin and fluorine is 1 : 2. The compound formed is SnF_2

For Compound B:

Given mass of Tin = 56.5 g

Moles of Tin = $\frac{56.5g}{118.71g/mol}=0.475mol$

Given mass of Fluorine = 36.2 g

Moles of Fluorine = $\frac{36.2g}{19g/mol}=1.905mol$

Mole ratio of Tin is = $\frac{0.475}{0.475}=1$

Mole ratio of Fluorine = $\frac{1.905}{0.475}=4.01\approx 4$

Mass ratio of Tin and fluorine is 1 : 24 The compound formed is SnF_4

answered: Guest

they both have a y in them

answered: Guest

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.