What is an empirical formula

2 answers:

8 0

A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.

zlopas [31]2 years ago

6 0

An empirical shows the simplest ratio among atoms in a compound .

<h2>More information</h2>

an empirical formula is the simplest formula for a compound .For example, H2O2 can be reduced to a simpler formula.
Determining a Molecular Formula from an Empirical Formula The empirical formula for a compound is P 2 O 5 . Its experimental molar mass is 284 g/mol.
For example, the empirical formula of benzene (C5H5) is Qj, - because the mole ratio of carbon am'hydrogen is 1:1.

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One beaker contains 19.93 mL, another contains 14.0 mL and a third contains 10.6 mL. What is the total volume of the three beake

Juli2301 [7.4K]

Answer:

$\large \boxed{\text{44.5 mL}}$

Explanation:

When adding or subtracting values, you must round your answer to the same "place" as the measurement with its last significant figure furthest to the left.

That is, you round off to the same number of decimal places as the measurement with the fewest decimal places.

$\begin{array}{r|r}19.9& \text{3 mL}\\14.0&\text{mL}\\10.6&\text{mL} \\\mathbf{44.5} &\textbf{3 mL}\\\end{array}$

The measurements of 14.0 and 10.6 have one digit after the decimal point, so you round the sum to have only one digit to the right of the decimal.

The number to be dropped (3) is less than 5, so you drop it.

$\text{The total volume of the three beakers is $\large \boxed{\textbf{44.5 mL}}$}$

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Answer:

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2 years ago

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dusya [7]

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The density of sodium is 968 g/cm3. Suppose you need 250 gm of sodium for an experiment. Which volume of sodium do you need? a 2

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Density = 968 g/cm³

mass = 250 g

Volume = ?

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D = m / V

968 = 250 / V

V = 250 / 968 => 0.26 cm³

Answer C

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2 years ago