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4 years ago

What is the empirical formula of a compound containing carbon, hydrogen, and oxygen in the ratio 14:42:84? C14H42O84

Chemistry

2 answers:

Arada [10]4 years ago

8 0

The answer is CH₃O₆

An empirical formula is the simplest ratio. So, let's simplify the ratio

14 : 42 : 84

All numbers are divisible by 14, therefore:

14 : 42 : 84 = (14/14) : (42/14) : (84:14) = 1 : 3 : 6

So, it contains 1 C-atom, 3 H-atoms, and 6 O-atoms

kati45 [8]4 years ago

6 0

C:H:O = 14:42:84 = 7:21:42 = 1:3:6

CH₃O₆

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Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope

morpeh [17]

Answer:

For a: The isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b: The isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c: The isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

Explanation:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

For a:

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b:

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c:

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

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3 years ago

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Ivanshal [37]

The correct answer is: [A]: "points with the same elevation" .
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3 years ago

How many grams (g) are in 0.250 moles of copper?

MissTica

Answer:

15.89grams

Explanation:

The mass of a substance can be calculated from it's mole value by using the formula:

mole = mass/molar mass

According to this question, there are 0.250 moles of copper. Hence, the mass of copper can be calculated as follows:

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3 years ago

Drag each label to the correct location on the chart. Classify each reaction as endothermic or exothermic.

fomenos

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