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4 years ago

Write the formula for the polyatomic ion in fe(hco3)3. express your answer as an ion.

Chemistry

1 answer:

Juliette [100K]4 years ago

6 0

Ions can be atomic or molecular. If an atom contains either positive or negative charge it said to be atomic cation or atomic anion.

When a molecule carry positive or negative charge it is called as polyatomic cation or polyatomic anion. Generally charged or ionized molecules are called as polyatomic ions.

In given question Fe(HCO₃)₃ ionizes as follow,

Fe(HCO₃)₃ → Fe³⁺ + 3 HCO₃⁻

The Ions produced are Fe³⁺ and HCO₃⁻. Fe³⁺ is said to be atomic (Ferric) ion and HCO₃⁻ (Bicarbonate) is polyatomic ion or molecular ion.

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How is the climate near the equator different from the climate near the poles? What causes this difference.

LUCKY_DIMON [66]

The climate near the equator is hot and dry, think of the Sahara desert. The climate near the north and south poles is very cold for almost the whole year.

One of the reasons for this is that as the earth orbits the sun the sun's rays are most intense for regions near the equator. Depending on the time of year, the sun's rays can be very weak near the poles, and if you are close enough to the poles there are days in deep winter when the sun does not even rise over the horizon!

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3 years ago

Read 2 more answers

Caffeine is a compound found in some natural coffees and teas and in some colas. a. Determine the empirical formula for caffeine

andrey2020 [161]

Answer: The molecular formula will be $C_8N_4H_{10}O_2$

Explanation:

Mass of C= 49.47 g

Mass of N = 28.85 g

Mass of O = 16.48 g

Mass of H = 5.20 g

Step 1 : convert given masses into moles.

Moles of C = $\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{49.47g}{12g/mole}=4.12moles$

Moles of N = $\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{28.85g}{14g/mole}=2.06moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{16.48g}{16g/mole}=1.03moles$

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{5.20g}{1g/mole}=5.20moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = $\frac{4.12}{1.03}=4$

For N = $\frac{2.06}{1.03}=2$

For O = $\frac{1.03}{1.03}=1$

For H = $\frac{5.20}{1.03}=5$

The ratio of C : N: O: H = 4: 2: 1: 5

Hence the empirical formula is $C_4N_2OH_5$

The empirical weight of $C_4N_2OH_5$ = 4(12)+2(14)+1(16)+5(1)= 97 g.

The molecular weight = 194.19 g/mole

Now we have to calculate the molecular formula.

$n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{194.19}{97}=2$

The molecular formula will be = $2\times C_4N_2H_5O=C_8N_4H_{10}O_2$

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3 years ago

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4 years ago

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Vlad1618 [11]

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4 years ago

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attashe74 [19]

Answer:

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I hope it's helpful!

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3 years ago