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Mariana [72]
3 years ago
9

How many moles of each element are in one mole of Sr(HCO3)2?

Chemistry
2 answers:
Alla [95]3 years ago
7 0
Sr = 1 mol
H = C = 2 mol each
O = 6 mol
Alchen [17]3 years ago
6 0

Explanation:

Since it is given that the compound Sr(HCO_{3})_{2} is one mole.

So, the elements present in it are strontium, hydrogen, carbon and oxygen.

Therefore, moles of elements present in Sr(HCO_{3})_{2} are as follows.

Number of strontium atom is 1.

Number of hydrogen atoms are 2.

Number of carbon atoms are 2.

Number of oxygen atoms are 3 \times 2 = 6.

Thus, we can conclude that there is 1 mole of Sr element, 2 mole of H element, 2 mole of carbon atom, and 6 moles of oxygen atom.

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Find the weight of HNO_3 present in 20ml, 0.30 N
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Answer:

mass of HNO₃ = 0.378 g

Explanation:

Normality = Molarity * number of equivalents

Molarity = Normality/number of equivalents

normality of HNO₃ = 0.30 N, Volume = 20 mL

HNO₃ ionizes in the following way:

HNO₃(aq) ----> H⁺ + NO₃⁻

Therefore, number of equivalents for HNO₃ is 1

molarity of HNO₃ = 0.30/1 =0.30 mol/dm³

Using the formula, molarity = number of moles/volume in liters

number of moles = molarity * volume

Number of moles of HNO₃ = 0.30 mol/dm³ * 20ml * 1 dm³ /1000 mL

number of moles = 0.006 moles

From the formula, mass = number of moles * molar mass

molar mass of HNO₃ = 63.0 g/mol

mass = 0.006 * 63

mass of HNO₃ = 0.378 g

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3 years ago
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Whats the donar mass

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Iridium has two naturally occurring isotopes, Iridium-191 and Iridium-193. If the average atomic mass of orodum s 192.217, what
Lina20 [59]

Answer:

The percent isotopic abundance of Ir-193 is 60.85 %

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Explanation:

we know there are two naturally occurring isotopes of iridium, Ir-191 and Ir-193

First of all we will set the fraction for both isotopes

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we will use the following equation,

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now we will calculate the abundance of Ir-191.

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Answer:

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