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3 years ago

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a compound is 21.20% nitrogen,6.06% hydrogen, 24,30% sulfur, and 48.45% oxygen. write the empirical formula and name the compoun

d

1 answer:

IRISSAK [1]3 years ago

4 0

The numbers may be off by a few, if you worked it out, since my periodic table is for AP chemistry. Hope this helps!!!

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Select the correct answer.

muminat

Answer:- B. 4.65 g.

Solution:- The given balanced equation is:

$2AgNO_3(aq)+Na_2S(aq)\rightarrow Ag_2S(s)+2NaNO_3(aq)$

It asks to calculate the mass of silver sulfide formed by when 0.0150 liters of 2.50 M of silver nitrate are used.

Moles of silver nitrate are calculated on multiplying it's liters by its molarity and then on multiplying by mol ratio, the moles of silver sulfide are calculated. These moles are multiplied by the molar mass to convert to the grams.

Molar mass of $Ag_2S$ = 2(107.87)+32.06 = 247.8 g per mol

The dimensional set up for the complete problem is:

$0.0150L(\frac{2.50molAgNO_3}{1L})(\frac{1molAg_2S}{2molAgNO_3})(\frac{247.8gAg_2S}{1molAg_2S})$

= $4.65gAg_2S$

So, the correct choice is B. 4.65 g.

7 0

3 years ago

I NEED HELP WITH ASAP!!

ivann1987 [24]

C. <span>High temperatures make the gas molecules move more quickly.
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6 0

2 years ago

I NEED THIS ASAP!!! Why is it important to know if a substance produced by chemical industry is pure?

ratelena [41]

Answer:High-purity chemicals are all-the-more important during the manufacturing process because chemicals are often used in bulk. ... In plastics, for example, an impure chemical substrate can produce an end-product that's too brittle to use. In pharmaceuticals, one impure component can render a drug dangerous

Explanation:

6 0

2 years ago

Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mi

12345 [234]

Answer:

The increasing order of masses of molecule ions:

118 g/mol(75.8%) , 120 g/mol(24.2%)

Explanation:

Chlorine occurs as 35-Cl (75.8%) and 37-Cl (24.2%).

Atomic mass of 35-Cl = 35 g/mol

Atomic mass of 37-Cl = 37 g/mol

Mass of Chlorocyclohexane in which 35-cl is present as a chlorine atom: $C_6H_{11}Cl$

$=6\times 12 g/mol+11\times 1 g/mol+1\times 35 g/mol=118 g/mol$

Mass of Chlorocyclohexane in which 37-Cl is present as a chlorine atom: $C_6H_{11}Cl$

$=6\times 12 g/mol+11\times 1 g/mol+1\times 37 g/mol=120 g/mol$

The increasing order of masses of molecule ions:

118 g/mol(75.8%) < 120 g/mol(24.2%)

5 0

2 years ago

A florist prepares a solution of nitrogen-phosphorus fertilizer by dissolving 5.66 g of NH4NO3 and 4.42 g of (NH4)3PO4 in enough

motikmotik

Answer:

0.00725 M

Explanation:

Considering for $NH_4NO_3$

Mass = 5.66 g

Molar mass of $NH_4NO_3$ = 80.043 g/mol

Moles = Mass taken / Molar mass

So,

<u>Moles = 5.66 / 80.043 moles = 0.0707 moles</u>

$NH_4NO_3$ will dissociate as:

$NH_4NO_3\rightarrow NH_4^++NO_3^-$

Thus 1 mole of $NH_4NO_3$ yields 1 mole of ammonium ions. So,

<u>Ammonium ions furnished by $NH_4NO_3$ = 1 × 0.0707 moles = 0.0707 moles</u>

Considering for $(NH_4)_3PO_4$

Mass = 4.42 g

Molar mass of $(NH_4)_3PO_4$ = 149.09 g/mol

Moles = Mass taken / Molar mass

So,

Moles = 4.42 / 149.09 moles = 0.0296 moles

$(NH_4)_3PO_4$ will dissociate as:

$(NH_4)_3PO_4\rightarrow 3NH_4^++PO_4^{3-}$

Thus 1 mole of $NH_4NO_3$ yields 3 moles of ammonium ions. So,

<u>Ammonium ions furnished by $(NH_4)_3PO_4$ = 3 × 0.0296 moles = 0.0888 moles</u>

<u>Total moles of the ammonium ions = 0.0707 + 0.0888 moles = 0.1595 moles</u>

Given that:

Volume = 22.0 L

So, Molarity of the $NH_4^+$ is:

<u>Molarity = Moles / Volume = 0.1595 / 22 M = 0.00725 M</u>

8 0

3 years ago