MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Empirical & Molecular Formula

The ratio of ...

Question

The ratio of the mass of C-12 atom to that of an atom of element $X$ (whose atomicity is four) is 1 : 9. Themolecular mass of element $X$ is

A

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B

$M o l e c u l a r m a s s = \frac{w e i g h t o f m o l e c u l e}{w e i g h t o f \frac{1}{12} t h p a r t o f C - 12 a t o m}$

Mass of element X $= 9 \times 12 \times 4 = 432$

Suggest Corrections

thumbs-up

21

Similar questions

Isotopes are the atoms of the same element; they have the same atomic number but different mass numbers. Isotopes have a different number of neutrons in their nucleus. If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m: n, then average atomic mass will

\frac{m \times a + n \times b}{m + n}

Different isotopes of the same element have the same position in the periodic table. The elements which have single isotope are called monoisotopic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature.

Answer the following questions:

The ratio of the mass of

^{12} C

atom to that of an atom of element= X (whose atomicity is four) is 1:9. The molecular mass element X is:

Q. Why any atom of an element is divided by 1/12th of carbon atom to find out the atomic mass of that same element

1) A sample of element X contents 100 atoms with a mass of 12. 00 u an 10 atoms with mass of 14. 00 u calculate the average atomic mass of element x.

Q. _____________________ is the number times one atom of an element is heavier than

1 / 12

the mass of an atom of carbon (

C^{12}

m

atoms of element

X

weigh 15 g and
4

m

atoms of element

Y

(atomic mass = 30) weigh 45 g, then the atomic mass of the element

X

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Percentage Composition and Molecular Formula

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Empirical & Molecular Formula

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon