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charle [14.2K]
3 years ago
13

Molecular mass of potassium hydrogen carbonate (KHCO3)

Chemistry
1 answer:
adelina 88 [10]3 years ago
7 0

Answer:

100gmol⁻¹

Explanation:

Problem: To calculate the molecular mass of

KHCO₃

Solution

The molar mass of a substance is defined as the number of grams per mole of that substance.

To determine the molar mass of this compound we find:

> the component atomic masses

>we express it in gmol⁻¹

From the periodic table, the atomic masses of the elements in the given compound are:

K = 39g

H = 1g

C = 12g

O = 16g

Now let's add these numbers together:

KHCO₃ = [39 + 1 + 12 + (16x3)]

= 39 +13 +48

= 100g

Molar mass of KHCO₃ = 100gmol⁻¹

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We have the following data:

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we calculate the moles found in 645 L of O2:

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n = P*V/R*T

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Answer:

Element A = Oxygen

Element H =

Element B = Aluminum

Element J = Magnesium

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Explanation:

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Element Q  is Francium because it has the largest radius and lowest ionization  energy of any element

Element F  is Antimony. It is a member of Nitrogen family  and has the second highest ionization energy level in family .

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Answer:

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Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

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Answer:

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