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Aleks [24]
2 years ago
13

What is the empirical formula of these molecules? Down below. Show your work.

Chemistry
1 answer:
kaheart [24]2 years ago
4 0

censures hydrogen Oxygen

Answer:

v

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Match the following terms and definitions.
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5 0
3 years ago
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Summarize Mendeleev and Moseley's contributions to the history of the periodic table.
timofeeve [1]

Answer:  According to Moseley, similar properties recur periodically when elements are arranged according to increasing atomic number. Atomic numbers, NOT weights, determine the factor of chemical properties.

Mendeleev realized that the physical and chemical properties of elements were related to their atomic mass in a "periodic" way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table

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3 years ago
a 150.0 ml sample of an aqueous solution at 25°c contains 20.0 mg of an unknown nonelectrolyte compound. if the solution has an
Nostrana [21]

The molar mass of the unknown compound is <u>223.2 g/mol.</u>

<u />

Solution:

Molarity =  \frac{Weight}{molecularweight}  * \frac{1000}{Volume (ml)}

4.54*10^{-4} = \frac{0.0152g}{molecularweight} * \frac{1000}{150.ml}

Molecular weight =<u> 223.2 g/mol</u>

<u />

The main difference between the two is that molar mass refers to the mass of one mole of a particular substance. Molecular weight is the mass of a molecule of a particular substance. Although the definitions and units of molar mass and molecular weight are different, the values ​​are the same.

The formula mass of a molecule is the sum of the atomic weights of the atoms in that molecular formula. The molecular weight of a molecule is the average mass calculated by adding the atomic weights of the atoms in the molecular formula. Molecular weight is the mass of a single molecule, specifically the mass of material required to make a single mole.

Learn more about Molecular weight here:-brainly.com/question/26388921

#SPJ4

3 0
2 years ago
(a) How many moles of CO2 contain 2.42 ✕ 1024 molecules?
Vikki [24]
Don’t currently have a calculator with me but just use Avogadros constant (A) 6.02x10^24, in the equation n=N/A. Lower case n being the number of mol and upper case being the number of molecules (given).
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3 years ago
Is grinding glass physical or a chemical change
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Chemical...........................
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