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Elina [12.6K]
3 years ago
12

Running for presindentr

Chemistry
1 answer:
irina1246 [14]3 years ago
6 0

Answer:

ok will do

Explanation:

moo

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Crime scene investigators keep a wide variety of compounds on hand to help with identifying unknown substances they find in the
almond37 [142]

The powder could be acetaminophen, analgesic  having chemical formula C_{17}H_{21}NO_{4}

<h3>What is an empirical formula?</h3>

A chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule.

We are given:

Percentage of C = 67.31 %

Percentage of H = 6.978 %

Percentage of N = 4.617 %

Percentage of O = 21.10 %

Let the mass of the compound be 100 g. So, the percentages given are taken as mass.

Mass of C = 67.31 g

Mass of H = 6.978 g

Mass of N = 4.617 g

Mass of O = 21.10 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of carbon = \frac{mass}{molar \;mass}

Moles of carbon =\frac{67.31g}{12g/mole}

=5.60 moles

Moles of hydrogen = \frac{mass}{molar \;mass}

Moles of hydrogen = \frac{6.978 g}{1 g/mole}

=6.978 moles

Moles of nitrogen =\frac{mass}{molar \;mass}

Moles of nitrogen = \frac{4.617  g}{14 g/mole}

=0.329 moles

Moles of oxygen =\frac{mass}{molar \;mass}

Moles of oxygen =\frac{21.10 g}{16 g/mole}

=1.31 moles

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.329 moles.

We get the ratio of C : H : N : O = 17 : 21 : 1 : 4

The empirical formula for the given compound is C_{17}H_{21}NO_{4}.

Learn more about the empirical formula here:

brainly.com/question/14044066

#SPJ1

3 0
2 years ago
A substance might freeze when thermal energy is ______ the substance.
maxonik [38]
I think it’s “Removed from”
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How does mercury negatively affect human health?
tekilochka [14]

Answer:

The inhalation of mercury vapour can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fata

Explanation:

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Which element has the smallest mass on the periodic table? *<br> O<br> H<br> Pb<br> He<br> Mg
Norma-Jean [14]

Answer:

That should be Hydrogen.

So The second option Is legit!

5 0
3 years ago
Can anyone help me?
fomenos

its C it has soo much PH

8 0
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