All categories

3 years ago

Determine the empirical and molecular formula for a compound containing 26.1

Chemistry

1 answer:

kobusy [5.1K]3 years ago

5 0

determing that the compoumd formed is in 100%

therefore, 26.1 +4.3+69.6 = 100%

hence no need of adding O molecule

finding the numbr of moles of each element

no. of moles of C= given mass÷molar mass

=26.1÷12

=2.1 mol

no. of moles of H = given mass÷molar mass

=4.3÷1

=4.3 mol

no of moles of O =given mass÷molar mass

=69.6÷16

=4.3

the simplest whole nber of the element in the unknown compoumd is 1:2:2 of C:H:O

HENCE, the empirical formula is CH2O2

empirical formula mass of CH2O2 IS

=(12)+(2×1)+(16×2)

12+2+32

46 G/MOL

N= molar mass of the compoumd ÷ emporical mass of the compoumd

N= 138÷46

N=3

molecular formula =N×empirical formula

=3 ×CH2O2

C3H6O6 is the molecular formula

(tartonic acid)

hope it helped u!

You might be interested in

How many grams of c6h12o6 are in 1. 90 x 1022 molecules of c6h12o6? the molar mass of c6h12o6 is 180. 0 g/mol. avogadro's number

d1i1m1o1n [39]

5.6 × 10⁻³ g/mol of C₆H₁₂O₆ are in 1. 90 x 10²² molecules.

The mass per unit amount of a certain chemical entity is known as the molar mass (symbol M, SI unit kgmol1). The chemical entity in question should always be identified in accordance with the mole definition.

The number of atoms present in 1 mole of hydrogen is equal to 6.02 × 10²³ known as Avogadro’s number (NA).

The units of molar mass follow its definition; grams per mole. Mathematically, the defining equation of molar mass is

Molar mass = mass/mole = g/mol

180g/mol glucose has = 6.02 × 10²³

x g/mol glucose has = 1.90 × 10 ²²

To find x;

$x = \frac{180.0 * 1.90 * 10^2^2}{6.02 * 10^2^3}$

x = 5.6 × 10⁻³ g/mol

Therefore, 5.6 × 10⁻³ g/mol of C₆H₁₂O₆ are in 1. 90 x 10²² molecules.

Learn more about molar mass here:

brainly.com/question/837939

#SPJ4

5 0

2 years ago

How many molecules of ethane ( C2H6) are present in 0.197g of C2H6?

Brut [27]

Answer:

3.945 x 10²¹ molecules

Explanation:

Firstly, we need to calculate the no. of moles using the relation:

n = mass/molar mass = (0.197 g)/(30.07 g/mol) = 6.55 x 10⁻³ mol.

It is known that every 1.0 mol of a molecule contains Avogadro's number of molecules (NA = 6.022 x 10²³).

∴ 0.197 g of C₂H₆ will contain = (6.55 x 10⁻³ mol)(6.022 x 10²³) = 3.945 x 10²¹ molecules.

4 0

3 years ago

Read 2 more answers

Do ionic compounds or covalent compounds conduct electricity

Liula [17]

None because Covalent compounds don’t conduct electricity because they are formed between the non metal atoms by sharing of electrons. The Covalent compounds haves no free electrons and also no ions and hence they do not conduct electricity. That is why they do not conduct electricity.

4 0

3 years ago

When the equation ZnS+O ZnO+SO isbalanced the coefficientof O is 1, 5, 3,or2

Flauer [41]

ZnS + O --> ZnO + SO

Okay so first you have to count up the number of elements on each side of the equation. Your objective is to have the same number of each element on both sides.

Left Side:
Zn - 1
S - 1
O - 1

Right Side:
Zn - 1
S - 1
O - 2

Since there are two oxygens on the right side, you have to add a coefficient of 2 to the oxygen on the left side. The coefficient tells us that that element or molecule is being multiplied by the value of coefficient. Since we're adding a coefficient of 2 to the oxygen on the left side, there are now 2 oxygens on that side. Because that is the same amount of oxygen as on the right, the equation is now balanced.

Your final equation should look like this: ZnS + 2O --> ZnO + SO

In conclusion, the answer is 2.

3 0

3 years ago

Read 2 more answers

What mass of carbon dioxide is produced from the complete combustion of 5.30x10-3 g of methane

Alenkinab [10]

0.0159 g of carbon dioxide

6 0

3 years ago

Read 2 more answers