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3 years ago

How many grams of sulfur are in 3.54 g of H2S?

Chemistry

1 answer:

ira [324]3 years ago

5 0

Answer:

3.329 g

Explanation:

First you need to determine the molar mass of H2S which is 34.1 g/mol.

With that we know that to find the moles of H2S we just divide the mass of sample with the molar mass.

3.54 g / 34.1 g/mol = 0.103812317 mol of H2S

This means that there is also 0.103812317 mol of sulfur since there is 1 mole of sulfur per 1 mole of H2S.

The molar mass of sulfur is 32.065 g/mol and to find the mass of sulfur you need to multiply the molar mass with the moles of the compound.

0.103812317 mol * 32.065 g/mol = 3.329 g of sulfur

Let me know if you get something else or if something is unclear in the comments so that we can figure it out.

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Calculate the empirical formula of a compound that is 42.9% Carbon and 57.1% Oxygen.

Marrrta [24]

Answer:

CO.

Explanation:

Assuming the given percentages are by mass, we can solve this problem via imagining we have 100 g of the compound, if that were the case we would have:

42.9 g of C

57.1 g of O

Now we convert those masses into moles, using the elements' respective molar masses:

42.9 g of C ÷ 12 g/mol = 3.57 mol C

57.1 g of O ÷ 16 g/mol = 3.58 mol O

As the number of C moles and O moles is roughly the same, the empirical formula for the compound is CO.

4 0

3 years ago

What mass of water is needed to raise the temperature by 15 degrees C using 165 Joules of energy

Lady bird [3.3K]

Mass of the water is 2.63 g.

Explanation:

Mass of the water, m = ? g

Temperature, ΔT = 15 °C

Heat absorbed, q = 165 J

Specific heat capacity, c = 4.18 J / g °C

q = m × c × ΔT

Now, we have to find the mass of the water by rewriting the above equation as,

m = $$\frac{q}{c\times dT }$

Now Plugin the above values in the equation as,

m = $$\frac{165}{4.18\times15}$

= 2.63 g

So the mass of the water is found as 2.63 g.

8 0

3 years ago

Read 2 more answers

Chemical weathering ____. a. is caused by freezing and thawing b. breaks apart rocks by physical processes c. occurs when chemic

Sonja [21]

C) Occurs when chemical reactions dissolve or change the minerals in rocks...... Hope it helps, have a nice day :)

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3 years ago

What are steps to solving stoichiomerty problems?

Arada [10]

Balance the equation.
Convert units of a given substance to moles.
Using the mole ratio, calculate the moles of substance yielded by the reaction.
Convert moles of wanted substance to desired units.

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3 years ago

When measuring a melting point why is it necessary to raise the temperature?

diamong [38]

To find when a substance melts

8 0

4 years ago