2 years ago

I'm so confused. If anyone could help me that would be amazing!

Chemistry

1 answer:

pantera1 [17]2 years ago

7 0

Well that depends on what you need help on, fist of all :)

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A sample of an ionic compound that is often used as a dough conditioner is analyzed and found to contain 4.628 g of potassium, 9

Roman55 [17]

Answer:

The empirical formula of the compound is = $KBrO_3$

The name of the compound is potassium bromate.

Explanation:

Mass of potassium = 4.628 g

Moles of potassium = $\frac{4.628 g}{39 g/mol}=0.1187 mol$

Mass of bromine = 9.457 g

Moles of bromine = $\frac{9.457 g}{80 g/mol}=0.1182 mol$

Mass of oxygen = 5.681 g

Moles of oxygen = $\frac{5.681 g}{16 g/mol}0.3551$

For empirical formula of the compound, divide the least number of moles from all the moles of elements present in the compound:

Potassium :

$\frac{0.1187 mol}{0.1182 mol}=1.0$

Bromine;

$\frac{0.1182 mol}{0.1182 mol}=1.0$

Oxygen ;

$\frac{0.3551 mol}{0.1182 mol}=3.0$

The empirical formula of the compound is = $KBrO_3$

The name of the compound is potassium bromate.

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3 years ago

Look at the element in group 12, period 4. Hover your mouse over the element to see more about it. Then fill in the following in

Svetlanka [38]

Answer:

name: zinc

symbol: Zn

atomic number: 30

number of protons: 30

atomic weight: 65.38 atomic mass units

I hope this helps!

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2 years ago

The following neutral atoms each have 8 places for electrons in their outermost shells.

Lunna [17]

C. ne with 8 valenc3 electrons

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2 years ago

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Why is it important to know what temperature scale is being used in a given situation?

Arisa [49]

It depends, for example, it is quite important to know the Kelvin scale (i.e 0 degrees Celsius is 273 K and -273 degrees Celsius is 0 K ) when dealing gases. But I don't know other situations where you would need to know other temperature scales.

Hope this helps and also if you are using Fahrenheit 1 Fahrenheit is -17.22 degrees Celsius

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3 years ago

What is the acronym for ribonucleic acid?

Masteriza [31]

The acronym is RNA. Ribo Nucleic Acid

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