All categories

3 years ago

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

You might be interested in

PLEASE HELP ASAP

nevsk [136]

Answer:

perchlorate as fuel. A possible reaction is

3Al (s) + 3NH4ClO4 (s) = Al2O3 (s) + AlCl3 (s) + 3NO (g) 6H2O (g)

5 0

3 years ago

Name the element described in each of the following:

musickatia [10]

Period 4 transition element that forms 2+ ion with a half‐filled d sub level is Manganese (Mn)

What is the half-filled d sub-level?

Transition metals are an interesting and challenging group of elements. They have perplexing patterns of electron distribution that don’t always follow the electron-filling rules. Predicting how they will form ions is also not always obvious.

Transition metals belong to the d block, meaning that the d sublevel of electrons is in the process of being filled with up to ten electrons. Many transition metals cannot lose enough electrons to attain a noble-gas electron configuration. In addition, the majority of transition metals are capable of adopting ions with different charges. Iron, which forms either the Fe2+ or Fe3+ ions, loses electrons as shown below.

Some transition metals that have relatively few d electrons may attain a noble-gas electron configuration. Scandium is an example. Others may attain configurations with a full d sublevel, such as zinc and copper.

to know more about half-filled d sub-level

brainly.com/question/24780241

#SPJ4

6 0

2 years ago

BRAINLIEST TO FIRST CORRECT ANSWER! :)

olasank [31]

Answer:

The answer is option 3.

Explanation:

Option 3 shows a balanced equation.

7 0

3 years ago

The little dipper is located in:

tamaranim1 [39]

The little dipper is located in Ursa Minor you would also get a clue because... Minor and little

8 0

3 years ago

Find the pH of a 0.100 molar H2C6O6 solution with ka, where KA is equal 8.0×10–5

lubasha [3.4K]

The pH of the solution is 2.54.

Explanation:

pH is the measure of acidity of the solution and Ka is the dissociation constant. Dissociation constant is the measure of concentration of hydrogen ion donated to the solution.

The solution of C₆H₂O₆ will get dissociated as C₆HO₆ and H+ ions. So the molar concentration of 0.1 M is present at the initial stage. Lets consider that the concentration of hydrogen ion released as x and the same amount of the base ion will also be released.

So the dissociation constant Kₐ can be written as the ratio of concentration of products to the concentration of reactants. As the concentration of reactants is given as 0.1 M and the concentration of products is considered as x for both hydrogen and base ion. Then the

$K_{a}=\frac{[H^{+}][HB] }{[reactant]}$

[HB] is the concentration of base.

$8 * 10^{-5} =\frac{x^{2} }{0.1}\\\\\\x^{2} = 8 * 10^{-5}*0.1$

$x^{2} = 0.08 * 10^{-4}\\ \\x = 0.283*10^{-2}$

Then

$pH = - log [x] = - log [ 0.283 * 10^{-2}]\\ \\pH = 2 + 0.548 = 2.54$

So the pH of the solution is 2.54.

4 0

3 years ago