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3 years ago

A compound is 2% H, 32.7% S, and 65.3% O by mass. What is the subscript on the O in the empirical formula for this compound?

1 answer:

4 0

Since all of those percents add up to 100, you can just directly convert that to grams. So now you can use 2 grams H, 32.7 grams S, and 65.3 grams O. Use that info and convert that to moles for an answer of 2mol H, 1mol S, and 4mol O. In every empirical question you need to divide each quantity of moles by the lowest number. In this case, that number is one, so they stay the same, but it's important to remember that step. You're final chemical formula would be H2SO4 and the answer to your question would be that the subscript for oxygen is 4. Hope this helped!

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3 years ago

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3 years ago

NH₄NO₃ → N₂O + 2H₂O When 45.70 g of NH₄NO₃ decomposes, what mass of each product is formed?

Anna007 [38]

Answer: 25.13 g of $N_2O$ and 20.56 g of $H_2O$ will be produced from 45.70 g of $NH_4NO_3$

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} NH_4NO_3=\frac{45.70g}{80.04g/mol}=0.571moles$

The balanced chemical equation is:

$NH_4NO_3\rightarrow N_2O+2H_2O$

According to stoichiometry :

1 mole of $NH_4NO_3$ produce = 1 mole of $N_2O$

Thus 0.571 moles of $NH_4NO_3$ will require= $\frac{1}{1}\times 0.571=0.571moles$ of $N_2O$

Mass of $N_2O=moles\times {\text {Molar mass}}=0.571moles\times 44.01g/mol=25.13g$

1 mole of $NH_4NO_3$ produce = 2 moles of $H_2O$

Thus 0.571 moles of $NH_4NO_3$ will require= $\frac{2}{1}\times 0.571=1.142moles$ of $H_2O$

Mass of $H_2O=moles\times {\text {Molar mass}}=1.142moles\times 18g/mol=20.56g$

Thus 25.13 g of $N_2O$ and 20.56 g of $H_2O$ will be produced from 45.70 g of $NH_4NO_3$

5 0

3 years ago

Is water an insulator or conducter of electricity

algol13

Answer:

Conductor

Explanation:

Electricity travels through water quickly.

6 0

2 years ago

Classify the following compounds as having covalent or ionic bonds.

maw [93]

Answer:

Ionic -

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

Covalent -

sulfur trioxide , phosphorus trichloride

Explanation:

Covalent bond -

Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.

It is the bond which is generally occurs within non metals as they share electrons to complete their octet.

The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .

Ionic bond -

It refers to the type of bond between two atoms , where the difference between the electronegativity is very high ( more than 1.7 ) .

Most of the salts are ionic in nature , and as soon as dissolved in water , dissociates into its respective ions .

Hence , from the question ,

The ionic bonds are -

barium chloride , potassium iodide , aluminum sulfide , strontium iodide .

And the covalent bonds are -

sulfur trioxide , phosphorus trichloride

6 0

4 years ago